Repository: scipy/scipy

Issue:
scipy.constants outdated: CODATA 2014 are now available
The official CODATA recommendations have been updated recently:
http://physics.nist.gov/cuu/Constants/index.html

The values in scipy should be probably updated to use the newer values.



Discussion:
Indeed, good point @hansharhoff . PR welcome.


Resolving patch:
diff --git a/scipy/constants/__init__.py b/scipy/constants/__init__.py
--- a/scipy/constants/__init__.py
+++ b/scipy/constants/__init__.py
@@ -59,7 +59,7 @@
 ------------------
 
 In addition to the above variables, :mod:`scipy.constants` also contains the
-2010 CODATA recommended values [CODATA2010]_ database containing more physical
+2014 CODATA recommended values [CODATA2014]_ database containing more physical
 constants.
 
 .. autosummary::
@@ -311,8 +311,8 @@
 References
 ==========
 
-.. [CODATA2010] CODATA Recommended Values of the Fundamental
-   Physical Constants 2010.
+.. [CODATA2014] CODATA Recommended Values of the Fundamental
+   Physical Constants 2014.
 
    http://physics.nist.gov/cuu/Constants/index.html
 
diff --git a/scipy/constants/codata.py b/scipy/constants/codata.py
--- a/scipy/constants/codata.py
+++ b/scipy/constants/codata.py
@@ -1,18 +1,19 @@
 # Compiled by Charles Harris, dated October 3, 2002
 # updated to 2002 values by BasSw, 2006
 # Updated to 2006 values by Vincent Davis June 2010
+# Updated to 2014 values by Joseph Booker, 2015
 
 """
 Fundamental Physical Constants
 ------------------------------
 
 These constants are taken from CODATA Recommended Values of the Fundamental
-Physical Constants 2010.
+Physical Constants 2014.
 
 Object
 ------
 physical_constants : dict
-    A dictionary containing physical constants. Keys are the names of physical 
+    A dictionary containing physical constants. Keys are the names of physical
     constants, values are tuples (value, units, precision).
 
 Functions
@@ -29,20 +30,21 @@
 Source
 ------
 The values of the constants provided at this site are recommended for
-international use by CODATA and are the latest available. Termed the "2010
+international use by CODATA and are the latest available. Termed the "2014
 CODATA recommended values," they are generally recognized worldwide for use in
-all fields of science and technology. The values became available on 2 June
-2011 and replaced the 2006 CODATA set. They are based on all of the data
-available through 31 December 2010. The 2010 adjustment was carried out under
-the auspices of the CODATA Task Group on Fundamental Constants. See References
-for an introduction to the constants for non-experts.
+all fields of science and technology. The values became available on 25 June
+2015 and replaced the 2010 CODATA set. They are based on all of the data
+available through 31 December 2014. The 2014 adjustment was carried out under
+the auspices of the CODATA Task Group on Fundamental Constants. Also available
+is an introduction to the constants for non-experts at
+http://physics.nist.gov/cuu/Constants/introduction.html
 
 References
 ----------
 Theoretical and experimental publications relevant to the fundamental constants
-and closely related precision measurements published since the mid 1980s, but 
-also including many older papers of particular interest, some of which date back 
-to the 1800s. To search bibliography visit
+and closely related precision measurements published since the mid 1980s, but
+also including many older papers of particular interest, some of which date
+back to the 1800s. To search bibliography visit
 
 http://physics.nist.gov/cuu/Constants/
 
@@ -59,11 +61,11 @@
 Source:  http://physics.nist.gov/cuu/Constants/index.html
 
 The values of the constants provided at the above site are recommended for
-international use by CODATA and are the latest available. Termed the "2006 
-CODATA recommended values", they are generally recognized worldwide for use 
-in all fields of science and technology. The values became available in March 
-2007 and replaced the 2002 CODATA set. They are based on all of the data 
-available through 31 December 2006. The 2006 adjustment was carried out under 
+international use by CODATA and are the latest available. Termed the "2006
+CODATA recommended values", they are generally recognized worldwide for use
+in all fields of science and technology. The values became available in March
+2007 and replaced the 2002 CODATA set. They are based on all of the data
+available through 31 December 2006. The 2006 adjustment was carried out under
 the auspices of the CODATA Task Group on Fundamental Constants.
 """
 
@@ -800,6 +802,343 @@
 Wien frequency displacement law constant               5.878 9254 e10        0.000 0053 e10        Hz K^-1
 Wien wavelength displacement law constant              2.897 7721 e-3        0.000 0026 e-3        m K"""
 
+txt2014 = """\
+{220} lattice spacing of silicon                       192.015 5714 e-12     0.000 0032 e-12       m
+alpha particle-electron mass ratio                     7294.299 541 36       0.000 000 24
+alpha particle mass                                    6.644 657 230 e-27    0.000 000 082 e-27    kg
+alpha particle mass energy equivalent                  5.971 920 097 e-10    0.000 000 073 e-10    J
+alpha particle mass energy equivalent in MeV           3727.379 378          0.000 023             MeV
+alpha particle mass in u                               4.001 506 179 127     0.000 000 000 063     u
+alpha particle molar mass                              4.001 506 179 127 e-3 0.000 000 000 063 e-3 kg mol^-1
+alpha particle-proton mass ratio                       3.972 599 689 07      0.000 000 000 36
+Angstrom star                                          1.000 014 95 e-10     0.000 000 90 e-10     m
+atomic mass constant                                   1.660 539 040 e-27    0.000 000 020 e-27    kg
+atomic mass constant energy equivalent                 1.492 418 062 e-10    0.000 000 018 e-10    J
+atomic mass constant energy equivalent in MeV          931.494 0954          0.000 0057            MeV
+atomic mass unit-electron volt relationship            931.494 0954 e6       0.000 0057 e6         eV
+atomic mass unit-hartree relationship                  3.423 177 6902 e7     0.000 000 0016 e7     E_h
+atomic mass unit-hertz relationship                    2.252 342 7206 e23    0.000 000 0010 e23    Hz
+atomic mass unit-inverse meter relationship            7.513 006 6166 e14    0.000 000 0034 e14    m^-1
+atomic mass unit-joule relationship                    1.492 418 062 e-10    0.000 000 018 e-10    J
+atomic mass unit-kelvin relationship                   1.080 954 38 e13      0.000 000 62 e13      K
+atomic mass unit-kilogram relationship                 1.660 539 040 e-27    0.000 000 020 e-27    kg
+atomic unit of 1st hyperpolarizability                 3.206 361 329 e-53    0.000 000 020 e-53    C^3 m^3 J^-2
+atomic unit of 2nd hyperpolarizability                 6.235 380 085 e-65    0.000 000 077 e-65    C^4 m^4 J^-3
+atomic unit of action                                  1.054 571 800 e-34    0.000 000 013 e-34    J s
+atomic unit of charge                                  1.602 176 6208 e-19   0.000 000 0098 e-19   C
+atomic unit of charge density                          1.081 202 3770 e12    0.000 000 0067 e12    C m^-3
+atomic unit of current                                 6.623 618 183 e-3     0.000 000 041 e-3     A
+atomic unit of electric dipole mom.                    8.478 353 552 e-30    0.000 000 052 e-30    C m
+atomic unit of electric field                          5.142 206 707 e11     0.000 000 032 e11     V m^-1
+atomic unit of electric field gradient                 9.717 362 356 e21     0.000 000 060 e21     V m^-2
+atomic unit of electric polarizability                 1.648 777 2731 e-41   0.000 000 0011 e-41   C^2 m^2 J^-1
+atomic unit of electric potential                      27.211 386 02         0.000 000 17          V
+atomic unit of electric quadrupole mom.                4.486 551 484 e-40    0.000 000 028 e-40    C m^2
+atomic unit of energy                                  4.359 744 650 e-18    0.000 000 054 e-18    J
+atomic unit of force                                   8.238 723 36 e-8      0.000 000 10 e-8      N
+atomic unit of length                                  0.529 177 210 67 e-10 0.000 000 000 12 e-10 m
+atomic unit of mag. dipole mom.                        1.854 801 999 e-23    0.000 000 011 e-23    J T^-1
+atomic unit of mag. flux density                       2.350 517 550 e5      0.000 000 014 e5      T
+atomic unit of magnetizability                         7.891 036 5886 e-29   0.000 000 0090 e-29   J T^-2
+atomic unit of mass                                    9.109 383 56 e-31     0.000 000 11 e-31     kg
+atomic unit of mom.um                                  1.992 851 882 e-24    0.000 000 024 e-24    kg m s^-1
+atomic unit of permittivity                            1.112 650 056... e-10 (exact)               F m^-1
+atomic unit of time                                    2.418 884 326509e-17  0.000 000 000014e-17  s
+atomic unit of velocity                                2.187 691 262 77 e6   0.000 000 000 50 e6   m s^-1
+Avogadro constant                                      6.022 140 857 e23     0.000 000 074 e23     mol^-1
+Bohr magneton                                          927.400 9994 e-26     0.000 0057 e-26       J T^-1
+Bohr magneton in eV/T                                  5.788 381 8012 e-5    0.000 000 0026 e-5    eV T^-1
+Bohr magneton in Hz/T                                  13.996 245 042 e9     0.000 000 086 e9      Hz T^-1
+Bohr magneton in inverse meters per tesla              46.686 448 14         0.000 000 29          m^-1 T^-1
+Bohr magneton in K/T                                   0.671 714 05          0.000 000 39          K T^-1
+Bohr radius                                            0.529 177 210 67 e-10 0.000 000 000 12 e-10 m
+Boltzmann constant                                     1.380 648 52 e-23     0.000 000 79 e-23     J K^-1
+Boltzmann constant in eV/K                             8.617 3303 e-5        0.000 0050 e-5        eV K^-1
+Boltzmann constant in Hz/K                             2.083 6612 e10        0.000 0012 e10        Hz K^-1
+Boltzmann constant in inverse meters per kelvin        69.503 457            0.000 040             m^-1 K^-1
+characteristic impedance of vacuum                     376.730 313 461...    (exact)               ohm
+classical electron radius                              2.817 940 3227 e-15   0.000 000 0019 e-15   m
+Compton wavelength                                     2.426 310 2367 e-12   0.000 000 0011 e-12   m
+Compton wavelength over 2 pi                           386.159 267 64 e-15   0.000 000 18 e-15     m
+conductance quantum                                    7.748 091 7310 e-5    0.000 000 0018 e-5    S
+conventional value of Josephson constant               483 597.9 e9          (exact)               Hz V^-1
+conventional value of von Klitzing constant            25 812.807            (exact)               ohm
+Cu x unit                                              1.002 076 97 e-13     0.000 000 28 e-13     m
+deuteron-electron mag. mom. ratio                      -4.664 345 535 e-4    0.000 000 026 e-4
+deuteron-electron mass ratio                           3670.482 967 85       0.000 000 13
+deuteron g factor                                      0.857 438 2311        0.000 000 0048
+deuteron mag. mom.                                     0.433 073 5040 e-26   0.000 000 0036 e-26   J T^-1
+deuteron mag. mom. to Bohr magneton ratio              0.466 975 4554 e-3    0.000 000 0026 e-3
+deuteron mag. mom. to nuclear magneton ratio           0.857 438 2311        0.000 000 0048
+deuteron mass                                          3.343 583 719 e-27    0.000 000 041 e-27    kg
+deuteron mass energy equivalent                        3.005 063 183 e-10    0.000 000 037 e-10    J
+deuteron mass energy equivalent in MeV                 1875.612 928          0.000 012             MeV
+deuteron mass in u                                     2.013 553 212 745     0.000 000 000 040     u
+deuteron molar mass                                    2.013 553 212 745 e-3 0.000 000 000 040 e-3 kg mol^-1
+deuteron-neutron mag. mom. ratio                       -0.448 206 52         0.000 000 11
+deuteron-proton mag. mom. ratio                        0.307 012 2077        0.000 000 0015
+deuteron-proton mass ratio                             1.999 007 500 87      0.000 000 000 19
+deuteron rms charge radius                             2.1413 e-15           0.0025 e-15           m
+electric constant                                      8.854 187 817... e-12 (exact)               F m^-1
+electron charge to mass quotient                       -1.758 820 024 e11    0.000 000 011 e11     C kg^-1
+electron-deuteron mag. mom. ratio                      -2143.923 499         0.000 012
+electron-deuteron mass ratio                           2.724 437 107 484 e-4 0.000 000 000 096 e-4
+electron g factor                                      -2.002 319 304 361 82 0.000 000 000 000 52
+electron gyromag. ratio                                1.760 859 644 e11     0.000 000 011 e11     s^-1 T^-1
+electron gyromag. ratio over 2 pi                      28 024.951 64         0.000 17              MHz T^-1
+electron-helion mass ratio                             1.819 543 074 854 e-4 0.000 000 000 088 e-4
+electron mag. mom.                                     -928.476 4620 e-26    0.000 0057 e-26       J T^-1
+electron mag. mom. anomaly                             1.159 652 180 91 e-3  0.000 000 000 26 e-3
+electron mag. mom. to Bohr magneton ratio              -1.001 159 652 180 91 0.000 000 000 000 26
+electron mag. mom. to nuclear magneton ratio           -1838.281 972 34      0.000 000 17
+electron mass                                          9.109 383 56 e-31     0.000 000 11 e-31     kg
+electron mass energy equivalent                        8.187 105 65 e-14     0.000 000 10 e-14     J
+electron mass energy equivalent in MeV                 0.510 998 9461        0.000 000 0031        MeV
+electron mass in u                                     5.485 799 090 70 e-4  0.000 000 000 16 e-4  u
+electron molar mass                                    5.485 799 090 70 e-7  0.000 000 000 16 e-7  kg mol^-1
+electron-muon mag. mom. ratio                          206.766 9880          0.000 0046
+electron-muon mass ratio                               4.836 331 70 e-3      0.000 000 11 e-3
+electron-neutron mag. mom. ratio                       960.920 50            0.000 23
+electron-neutron mass ratio                            5.438 673 4428 e-4    0.000 000 0027 e-4
+electron-proton mag. mom. ratio                        -658.210 6866         0.000 0020
+electron-proton mass ratio                             5.446 170 213 52 e-4  0.000 000 000 52 e-4
+electron-tau mass ratio                                2.875 92 e-4          0.000 26 e-4
+electron to alpha particle mass ratio                  1.370 933 554 798 e-4 0.000 000 000 045 e-4
+electron to shielded helion mag. mom. ratio            864.058 257           0.000 010
+electron to shielded proton mag. mom. ratio            -658.227 5971         0.000 0072
+electron-triton mass ratio                             1.819 200 062 203 e-4 0.000 000 000 084 e-4
+electron volt                                          1.602 176 6208 e-19   0.000 000 0098 e-19   J
+electron volt-atomic mass unit relationship            1.073 544 1105 e-9    0.000 000 0066 e-9    u
+electron volt-hartree relationship                     3.674 932 248 e-2     0.000 000 023 e-2     E_h
+electron volt-hertz relationship                       2.417 989 262 e14     0.000 000 015 e14     Hz
+electron volt-inverse meter relationship               8.065 544 005 e5      0.000 000 050 e5      m^-1
+electron volt-joule relationship                       1.602 176 6208 e-19   0.000 000 0098 e-19   J
+electron volt-kelvin relationship                      1.160 452 21 e4       0.000 000 67 e4       K
+electron volt-kilogram relationship                    1.782 661 907 e-36    0.000 000 011 e-36    kg
+elementary charge                                      1.602 176 6208 e-19   0.000 000 0098 e-19   C
+elementary charge over h                               2.417 989 262 e14     0.000 000 015 e14     A J^-1
+Faraday constant                                       96 485.332 89         0.000 59              C mol^-1
+Faraday constant for conventional electric current     96 485.3251           0.0012                C_90 mol^-1
+Fermi coupling constant                                1.166 3787 e-5        0.000 0006 e-5        GeV^-2
+fine-structure constant                                7.297 352 5664 e-3    0.000 000 0017 e-3
+first radiation constant                               3.741 771 790 e-16    0.000 000 046 e-16    W m^2
+first radiation constant for spectral radiance         1.191 042 953 e-16    0.000 000 015 e-16    W m^2 sr^-1
+hartree-atomic mass unit relationship                  2.921 262 3197 e-8    0.000 000 0013 e-8    u
+hartree-electron volt relationship                     27.211 386 02         0.000 000 17          eV
+Hartree energy                                         4.359 744 650 e-18    0.000 000 054 e-18    J
+Hartree energy in eV                                   27.211 386 02         0.000 000 17          eV
+hartree-hertz relationship                             6.579 683 920 711 e15 0.000 000 000 039 e15 Hz
+hartree-inverse meter relationship                     2.194 746 313 702 e7  0.000 000 000 013 e7  m^-1
+hartree-joule relationship                             4.359 744 650 e-18    0.000 000 054 e-18    J
+hartree-kelvin relationship                            3.157 7513 e5         0.000 0018 e5         K
+hartree-kilogram relationship                          4.850 870 129 e-35    0.000 000 060 e-35    kg
+helion-electron mass ratio                             5495.885 279 22       0.000 000 27
+helion g factor                                        -4.255 250 616        0.000 000 050
+helion mag. mom.                                       -1.074 617 522 e-26   0.000 000 014 e-26    J T^-1
+helion mag. mom. to Bohr magneton ratio                -1.158 740 958 e-3    0.000 000 014 e-3
+helion mag. mom. to nuclear magneton ratio             -2.127 625 308        0.000 000 025
+helion mass                                            5.006 412 700 e-27    0.000 000 062 e-27    kg
+helion mass energy equivalent                          4.499 539 341 e-10    0.000 000 055 e-10    J
+helion mass energy equivalent in MeV                   2808.391 586          0.000 017             MeV
+helion mass in u                                       3.014 932 246 73      0.000 000 000 12      u
+helion molar mass                                      3.014 932 246 73 e-3  0.000 000 000 12 e-3  kg mol^-1
+helion-proton mass ratio                               2.993 152 670 46      0.000 000 000 29
+hertz-atomic mass unit relationship                    4.439 821 6616 e-24   0.000 000 0020 e-24   u
+hertz-electron volt relationship                       4.135 667 662 e-15    0.000 000 025 e-15    eV
+hertz-hartree relationship                             1.5198298460088 e-16  0.0000000000090e-16   E_h
+hertz-inverse meter relationship                       3.335 640 951... e-9  (exact)               m^-1
+hertz-joule relationship                               6.626 070 040 e-34    0.000 000 081 e-34    J
+hertz-kelvin relationship                              4.799 2447 e-11       0.000 0028 e-11       K
+hertz-kilogram relationship                            7.372 497 201 e-51    0.000 000 091 e-51    kg
+inverse fine-structure constant                        137.035 999 139       0.000 000 031
+inverse meter-atomic mass unit relationship            1.331 025 049 00 e-15 0.000 000 000 61 e-15 u
+inverse meter-electron volt relationship               1.239 841 9739 e-6    0.000 000 0076 e-6    eV
+inverse meter-hartree relationship                     4.556 335 252 767 e-8 0.000 000 000 027 e-8 E_h
+inverse meter-hertz relationship                       299 792 458           (exact)               Hz
+inverse meter-joule relationship                       1.986 445 824 e-25    0.000 000 024 e-25    J
+inverse meter-kelvin relationship                      1.438 777 36 e-2      0.000 000 83 e-2      K
+inverse meter-kilogram relationship                    2.210 219 057 e-42    0.000 000 027 e-42    kg
+inverse of conductance quantum                         12 906.403 7278       0.000 0029            ohm
+Josephson constant                                     483 597.8525 e9       0.0030 e9             Hz V^-1
+joule-atomic mass unit relationship                    6.700 535 363 e9      0.000 000 082 e9      u
+joule-electron volt relationship                       6.241 509 126 e18     0.000 000 038 e18     eV
+joule-hartree relationship                             2.293 712 317 e17     0.000 000 028 e17     E_h
+joule-hertz relationship                               1.509 190 205 e33     0.000 000 019 e33     Hz
+joule-inverse meter relationship                       5.034 116 651 e24     0.000 000 062 e24     m^-1
+joule-kelvin relationship                              7.242 9731 e22        0.000 0042 e22        K
+joule-kilogram relationship                            1.112 650 056... e-17 (exact)               kg
+kelvin-atomic mass unit relationship                   9.251 0842 e-14       0.000 0053 e-14       u
+kelvin-electron volt relationship                      8.617 3303 e-5        0.000 0050 e-5        eV
+kelvin-hartree relationship                            3.166 8105 e-6        0.000 0018 e-6        E_h
+kelvin-hertz relationship                              2.083 6612 e10        0.000 0012 e10        Hz
+kelvin-inverse meter relationship                      69.503 457            0.000 040             m^-1
+kelvin-joule relationship                              1.380 648 52 e-23     0.000 000 79 e-23     J
+kelvin-kilogram relationship                           1.536 178 65 e-40     0.000 000 88 e-40     kg
+kilogram-atomic mass unit relationship                 6.022 140 857 e26     0.000 000 074 e26     u
+kilogram-electron volt relationship                    5.609 588 650 e35     0.000 000 034 e35     eV
+kilogram-hartree relationship                          2.061 485 823 e34     0.000 000 025 e34     E_h
+kilogram-hertz relationship                            1.356 392 512 e50     0.000 000 017 e50     Hz
+kilogram-inverse meter relationship                    4.524 438 411 e41     0.000 000 056 e41     m^-1
+kilogram-joule relationship                            8.987 551 787... e16  (exact)               J
+kilogram-kelvin relationship                           6.509 6595 e39        0.000 0037 e39        K
+lattice parameter of silicon                           543.102 0504 e-12     0.000 0089 e-12       m
+Loschmidt constant (273.15 K, 100 kPa)                 2.651 6467 e25        0.000 0015 e25        m^-3
+Loschmidt constant (273.15 K, 101.325 kPa)             2.686 7811 e25        0.000 0015 e25        m^-3
+mag. constant                                          12.566 370 614... e-7 (exact)               N A^-2
+mag. flux quantum                                      2.067 833 831 e-15    0.000 000 013 e-15    Wb
+molar gas constant                                     8.314 4598            0.000 0048            J mol^-1 K^-1
+molar mass constant                                    1 e-3                 (exact)               kg mol^-1
+molar mass of carbon-12                                12 e-3                (exact)               kg mol^-1
+molar Planck constant                                  3.990 312 7110 e-10   0.000 000 0018 e-10   J s mol^-1
+molar Planck constant times c                          0.119 626 565 582     0.000 000 000 054     J m mol^-1
+molar volume of ideal gas (273.15 K, 100 kPa)          22.710 947 e-3        0.000 013 e-3         m^3 mol^-1
+molar volume of ideal gas (273.15 K, 101.325 kPa)      22.413 962 e-3        0.000 013 e-3         m^3 mol^-1
+molar volume of silicon                                12.058 832 14 e-6     0.000 000 61 e-6      m^3 mol^-1
+Mo x unit                                              1.002 099 52 e-13     0.000 000 53 e-13     m
+muon Compton wavelength                                11.734 441 11 e-15    0.000 000 26 e-15     m
+muon Compton wavelength over 2 pi                      1.867 594 308 e-15    0.000 000 042 e-15    m
+muon-electron mass ratio                               206.768 2826          0.000 0046
+muon g factor                                          -2.002 331 8418       0.000 000 0013
+muon mag. mom.                                         -4.490 448 26 e-26    0.000 000 10 e-26     J T^-1
+muon mag. mom. anomaly                                 1.165 920 89 e-3      0.000 000 63 e-3
+muon mag. mom. to Bohr magneton ratio                  -4.841 970 48 e-3     0.000 000 11 e-3
+muon mag. mom. to nuclear magneton ratio               -8.890 597 05         0.000 000 20
+muon mass                                              1.883 531 594 e-28    0.000 000 048 e-28    kg
+muon mass energy equivalent                            1.692 833 774 e-11    0.000 000 043 e-11    J
+muon mass energy equivalent in MeV                     105.658 3745          0.000 0024            MeV
+muon mass in u                                         0.113 428 9257        0.000 000 0025        u
+muon molar mass                                        0.113 428 9257 e-3    0.000 000 0025 e-3    kg mol^-1
+muon-neutron mass ratio                                0.112 454 5167        0.000 000 0025
+muon-proton mag. mom. ratio                            -3.183 345 142        0.000 000 071
+muon-proton mass ratio                                 0.112 609 5262        0.000 000 0025
+muon-tau mass ratio                                    5.946 49 e-2          0.000 54 e-2
+natural unit of action                                 1.054 571 800 e-34    0.000 000 013 e-34    J s
+natural unit of action in eV s                         6.582 119 514 e-16    0.000 000 040 e-16    eV s
+natural unit of energy                                 8.187 105 65 e-14     0.000 000 10 e-14     J
+natural unit of energy in MeV                          0.510 998 9461        0.000 000 0031        MeV
+natural unit of length                                 386.159 267 64 e-15   0.000 000 18 e-15     m
+natural unit of mass                                   9.109 383 56 e-31     0.000 000 11 e-31     kg
+natural unit of mom.um                                 2.730 924 488 e-22    0.000 000 034 e-22    kg m s^-1
+natural unit of mom.um in MeV/c                        0.510 998 9461        0.000 000 0031        MeV/c
+natural unit of time                                   1.288 088 667 12 e-21 0.000 000 000 58 e-21 s
+natural unit of velocity                               299 792 458           (exact)               m s^-1
+neutron Compton wavelength                             1.319 590 904 81 e-15 0.000 000 000 88 e-15 m
+neutron Compton wavelength over 2 pi                   0.210 019 415 36 e-15 0.000 000 000 14 e-15 m
+neutron-electron mag. mom. ratio                       1.040 668 82 e-3      0.000 000 25 e-3
+neutron-electron mass ratio                            1838.683 661 58       0.000 000 90
+neutron g factor                                       -3.826 085 45         0.000 000 90
+neutron gyromag. ratio                                 1.832 471 72 e8       0.000 000 43 e8       s^-1 T^-1
+neutron gyromag. ratio over 2 pi                       29.164 6933           0.000 0069            MHz T^-1
+neutron mag. mom.                                      -0.966 236 50 e-26    0.000 000 23 e-26     J T^-1
+neutron mag. mom. to Bohr magneton ratio               -1.041 875 63 e-3     0.000 000 25 e-3
+neutron mag. mom. to nuclear magneton ratio            -1.913 042 73         0.000 000 45
+neutron mass                                           1.674 927 471 e-27    0.000 000 021 e-27    kg
+neutron mass energy equivalent                         1.505 349 739 e-10    0.000 000 019 e-10    J
+neutron mass energy equivalent in MeV                  939.565 4133          0.000 0058            MeV
+neutron mass in u                                      1.008 664 915 88      0.000 000 000 49      u
+neutron molar mass                                     1.008 664 915 88 e-3  0.000 000 000 49 e-3  kg mol^-1
+neutron-muon mass ratio                                8.892 484 08          0.000 000 20
+neutron-proton mag. mom. ratio                         -0.684 979 34         0.000 000 16
+neutron-proton mass difference                         2.305 573 77 e-30     0.000 000 85 e-30
+neutron-proton mass difference energy equivalent       2.072 146 37 e-13     0.000 000 76 e-13
+neutron-proton mass difference energy equivalent in MeV 1.293 332 05         0.000 000 48
+neutron-proton mass difference in u                    0.001 388 449 00      0.000 000 000 51
+neutron-proton mass ratio                              1.001 378 418 98      0.000 000 000 51
+neutron-tau mass ratio                                 0.528 790             0.000 048
+neutron to shielded proton mag. mom. ratio             -0.684 996 94         0.000 000 16
+Newtonian constant of gravitation                      6.674 08 e-11         0.000 31 e-11         m^3 kg^-1 s^-2
+Newtonian constant of gravitation over h-bar c         6.708 61 e-39         0.000 31 e-39         (GeV/c^2)^-2
+nuclear magneton                                       5.050 783 699 e-27    0.000 000 031 e-27    J T^-1
+nuclear magneton in eV/T                               3.152 451 2550 e-8    0.000 000 0015 e-8    eV T^-1
+nuclear magneton in inverse meters per tesla           2.542 623 432 e-2     0.000 000 016 e-2     m^-1 T^-1
+nuclear magneton in K/T                                3.658 2690 e-4        0.000 0021 e-4        K T^-1
+nuclear magneton in MHz/T                              7.622 593 285         0.000 000 047         MHz T^-1
+Planck constant                                        6.626 070 040 e-34    0.000 000 081 e-34    J s
+Planck constant in eV s                                4.135 667 662 e-15    0.000 000 025 e-15    eV s
+Planck constant over 2 pi                              1.054 571 800 e-34    0.000 000 013 e-34    J s
+Planck constant over 2 pi in eV s                      6.582 119 514 e-16    0.000 000 040 e-16    eV s
+Planck constant over 2 pi times c in MeV fm            197.326 9788          0.000 0012            MeV fm
+Planck length                                          1.616 229 e-35        0.000 038 e-35        m
+Planck mass                                            2.176 470 e-8         0.000 051 e-8         kg
+Planck mass energy equivalent in GeV                   1.220 910 e19         0.000 029 e19         GeV
+Planck temperature                                     1.416 808 e32         0.000 033 e32         K
+Planck time                                            5.391 16 e-44         0.000 13 e-44         s
+proton charge to mass quotient                         9.578 833 226 e7      0.000 000 059 e7      C kg^-1
+proton Compton wavelength                              1.321 409 853 96 e-15 0.000 000 000 61 e-15 m
+proton Compton wavelength over 2 pi                    0.210 308910109e-15   0.000 000 000097e-15  m
+proton-electron mass ratio                             1836.152 673 89       0.000 000 17
+proton g factor                                        5.585 694 702         0.000 000 017
+proton gyromag. ratio                                  2.675 221 900 e8      0.000 000 018 e8      s^-1 T^-1
+proton gyromag. ratio over 2 pi                        42.577 478 92         0.000 000 29          MHz T^-1
+proton mag. mom.                                       1.410 606 7873 e-26   0.000 000 0097 e-26   J T^-1
+proton mag. mom. to Bohr magneton ratio                1.521 032 2053 e-3    0.000 000 0046 e-3
+proton mag. mom. to nuclear magneton ratio             2.792 847 3508        0.000 000 0085
+proton mag. shielding correction                       25.691 e-6            0.011 e-6
+proton mass                                            1.672 621 898 e-27    0.000 000 021 e-27    kg
+proton mass energy equivalent                          1.503 277 593 e-10    0.000 000 018 e-10    J
+proton mass energy equivalent in MeV                   938.272 0813          0.000 0058            MeV
+proton mass in u                                       1.007 276 466 879     0.000 000 000 091     u
+proton molar mass                                      1.007 276 466 879 e-3 0.000 000 000 091 e-3 kg mol^-1
+proton-muon mass ratio                                 8.880 243 38          0.000 000 20
+proton-neutron mag. mom. ratio                         -1.459 898 05         0.000 000 34
+proton-neutron mass ratio                              0.998 623 478 44      0.000 000 000 51
+proton rms charge radius                               0.8751 e-15           0.0061 e-15           m
+proton-tau mass ratio                                  0.528 063             0.000 048
+quantum of circulation                                 3.636 947 5486 e-4    0.000 000 0017 e-4    m^2 s^-1
+quantum of circulation times 2                         7.273 895 0972 e-4    0.000 000 0033 e-4    m^2 s^-1
+Rydberg constant                                       10 973 731.568 508    0.000 065             m^-1
+Rydberg constant times c in Hz                         3.289 841 960 355 e15 0.000 000 000 019 e15 Hz
+Rydberg constant times hc in eV                        13.605 693 009        0.000 000 084         eV
+Rydberg constant times hc in J                         2.179 872 325 e-18    0.000 000 027 e-18    J
+Sackur-Tetrode constant (1 K, 100 kPa)                 -1.151 7084           0.000 0014
+Sackur-Tetrode constant (1 K, 101.325 kPa)             -1.164 8714           0.000 0014
+second radiation constant                              1.438 777 36 e-2      0.000 000 83 e-2      m K
+shielded helion gyromag. ratio                         2.037 894 585 e8      0.000 000 027 e8      s^-1 T^-1
+shielded helion gyromag. ratio over 2 pi               32.434 099 66         0.000 000 43          MHz T^-1
+shielded helion mag. mom.                              -1.074 553 080 e-26   0.000 000 014 e-26    J T^-1
+shielded helion mag. mom. to Bohr magneton ratio       -1.158 671 471 e-3    0.000 000 014 e-3
+shielded helion mag. mom. to nuclear magneton ratio    -2.127 497 720        0.000 000 025
+shielded helion to proton mag. mom. ratio              -0.761 766 5603       0.000 000 0092
+shielded helion to shielded proton mag. mom. ratio     -0.761 786 1313       0.000 000 0033
+shielded proton gyromag. ratio                         2.675 153 171 e8      0.000 000 033 e8      s^-1 T^-1
+shielded proton gyromag. ratio over 2 pi               42.576 385 07         0.000 000 53          MHz T^-1
+shielded proton mag. mom.                              1.410 570 547 e-26    0.000 000 018 e-26    J T^-1
+shielded proton mag. mom. to Bohr magneton ratio       1.520 993 128 e-3     0.000 000 017 e-3
+shielded proton mag. mom. to nuclear magneton ratio    2.792 775 600         0.000 000 030
+speed of light in vacuum                               299 792 458           (exact)               m s^-1
+standard acceleration of gravity                       9.806 65              (exact)               m s^-2
+standard atmosphere                                    101 325               (exact)               Pa
+standard-state pressure                                100 000               (exact)               Pa
+Stefan-Boltzmann constant                              5.670 367 e-8         0.000 013 e-8         W m^-2 K^-4
+tau Compton wavelength                                 0.697 787 e-15        0.000 063 e-15        m
+tau Compton wavelength over 2 pi                       0.111 056 e-15        0.000 010 e-15        m
+tau-electron mass ratio                                3477.15               0.31
+tau mass                                               3.167 47 e-27         0.000 29 e-27         kg
+tau mass energy equivalent                             2.846 78 e-10         0.000 26 e-10         J
+tau mass energy equivalent in MeV                      1776.82               0.16                  MeV
+tau mass in u                                          1.907 49              0.000 17              u
+tau molar mass                                         1.907 49 e-3          0.000 17 e-3          kg mol^-1
+tau-muon mass ratio                                    16.8167               0.0015
+tau-neutron mass ratio                                 1.891 11              0.000 17
+tau-proton mass ratio                                  1.893 72              0.000 17
+Thomson cross section                                  0.665 245 871 58 e-28 0.000 000 000 91 e-28 m^2
+triton-electron mass ratio                             5496.921 535 88       0.000 000 26
+triton g factor                                        5.957 924 920         0.000 000 028
+triton mag. mom.                                       1.504 609 503 e-26    0.000 000 012 e-26    J T^-1
+triton mag. mom. to Bohr magneton ratio                1.622 393 6616 e-3    0.000 000 0076 e-3
+triton mag. mom. to nuclear magneton ratio             2.978 962 460         0.000 000 014
+triton mass                                            5.007 356 665 e-27    0.000 000 062 e-27    kg
+triton mass energy equivalent                          4.500 387 735 e-10    0.000 000 055 e-10    J
+triton mass energy equivalent in MeV                   2808.921 112          0.000 017             MeV
+triton mass in u                                       3.015 500 716 32      0.000 000 000 11      u
+triton molar mass                                      3.015 500 716 32 e-3  0.000 000 000 11 e-3  kg mol^-1
+triton-proton mass ratio                               2.993 717 033 48      0.000 000 000 22
+unified atomic mass unit                               1.660 539 040 e-27    0.000 000 020 e-27    kg
+von Klitzing constant                                  25 812.807 4555       0.000 0059            ohm
+weak mixing angle                                      0.2223                0.0021
+Wien frequency displacement law constant               5.878 9238 e10        0.000 0034 e10        Hz K^-1
+Wien wavelength displacement law constant              2.897 7729 e-3        0.000 0017 e-3        m K"""
+
 # -----------------------------------------------------------------------------
 
 physical_constants = {}
@@ -821,12 +1160,15 @@ def parse_constants(d):
 _physical_constants_2002 = parse_constants(txt2002)
 _physical_constants_2006 = parse_constants(txt2006)
 _physical_constants_2010 = parse_constants(txt2010)
+_physical_constants_2014 = parse_constants(txt2014)
+
 
 physical_constants.update(_physical_constants_2002)
 physical_constants.update(_physical_constants_2006)
 physical_constants.update(_physical_constants_2010)
-_current_constants = _physical_constants_2010
-_current_codata = "CODATA 2010"
+physical_constants.update(_physical_constants_2014)
+_current_constants = _physical_constants_2014
+_current_codata = "CODATA 2014"
 
 # check obsolete values
 _obsolete_constants = {}
@@ -876,9 +1218,9 @@ def value(key):
 
     Examples
     --------
-    >>> from scipy.constants import codata
-    >>> codata.value('elementary charge')
-        1.602176487e-019
+    >>> from scipy import constants
+    >>> constants.value(u'elementary charge')
+        1.6021766208e-19
 
     """
     _check_obsolete(key)
@@ -906,8 +1248,8 @@ def unit(key):
 
     Examples
     --------
-    >>> from scipy.constants import codata
-    >>> codata.unit(u'proton mass')
+    >>> from scipy import constants
+    >>> constants.unit(u'proton mass')
     'kg'
 
     """
@@ -936,9 +1278,9 @@ def precision(key):
 
     Examples
     --------
-    >>> from scipy.constants import codata
-    >>> codata.precision(u'proton mass')
-    4.96226989798e-08
+    >>> from scipy import constants
+    >>> constants.precision(u'proton mass')
+    1.2555138746605121e-08
 
     """
     _check_obsolete(key)
@@ -947,7 +1289,7 @@ def precision(key):
 
 def find(sub=None, disp=False):
     """
-    Return list of codata.physical_constant keys containing a given string.
+    Return list of physical_constant keys containing a given string.
 
     Parameters
     ----------


Test patch: