semvec/pypi-packages huggingface dataset:
intec-units 0.0.5
Physical units library
License: MIT
Requires Python: >=3.4

#### Standard physical units are imported from ``intec.units.si``


```python
from intec.units.si import METER, MILLIMETER, NANOMETER, AMPERE, VOLT, OHM
```

#### A ```Quantity``` is created by multiplying a number (the magnitude) and a ``Unit``


```python
d = 1550*NANOMETER
print(d)
```

    1550.000000 nm



```python
d
```




    LengthQuantity( 1.5500000000e+03, nm )



#### Quantities of the same physical dimension can be added or substracted


```python
1*METER + 5*MILLIMETER
```




    LengthQuantity( 1.0050000000e+00, m )



#### The resulting quantity gets the unit of the first term.


```python
print(5*MILLIMETER + 1*METER)
```

    1005.000000 mm



```python
1*METER + 1*AMPERE
```


    ---------------------------------------------------------------------------

    TypeError                                 Traceback (most recent call last)

    <ipython-input-6-26114287a935> in <module>
    ----> 1 1*METER + 1*AMPERE


    TypeError: Cannot convert unit [A] to unit [m]


#### Quantities of the same physical dimension can be compared


```python
p = 1*VOLT*2*AMPERE
print(p)
```

    2.000000 V.A



```python
from intec.units.si import WATT, MILLIWATT, DBM
p == 2*WATT
```




    True




```python
3*VOLT/AMPERE > 2*OHM
```




    True



#### Use the ``to`` member function to convert a quantity to a related unit.


```python
print(p.to(MILLIWATT))
print(p.to(DBM))
```

    2000.000000 mW
    33.010300 dBm



```python
from intec.units.si import METER, KILOMETER, SECOND
from intec.units.extra import HOUR
speed = 10*METER/SECOND
print(speed.to(KILOMETER/HOUR))
```

    36.000000 km/h


#### Use the member ```magnitude``` or ```m``` to retrieve the numerical value of a quantity


```python
speed.magnitude
```




    10.0




```python
speed.m
```




    10.0



#### Use the member ```unit``` or ```u``` to retrieve the unit of a quantity


```python
speed.unit
```




    Unit( 'm/s' [m/s] )




```python
speed.u
```




    Unit( 'm/s' [m/s] )



#### For (wave)lengths there is a convenience function to convert to frequency.


```python
from intec.units.si import NANOMETER,HERTZ
λ = 1550*NANOMETER
λ.to_frequency()
```




    FrequencyQuantity( 1.9341448903e+02, THz )




```python
λ.to_frequency(HERTZ)
```




    FrequencyQuantity( 1.9341448903e+14, Hz )



#### For photonic experiments, use ```intec.units.photonic``` to import all common units in one fell swoop


```python
from intec.units.photonic import *
```

```
from .si import METER, MILLIMETER, MICROMETER, NANOMETER, PICOMETER, FEMTOMETER
from .si import WATT, MILLIWATT, MICROWATT, DBM
from .si import VOLT, MILLIVOLT, MICROVOLT
from .si import AMPERE, MILLIAMPERE, MICROAMPERE
from .si import HERTZ, KILOHERTZ, MEGAHERTZ, GIGAHERTZ, TERAHERTZ
from .si import SECOND, MILLISECOND, MICROSECOND
from .si import KELVIN, CELCIUS
```


```python

```