Package: segpy
Segpy is open source software created by Sixty North and licensed under the GNU Affero General Public License.Alternative commercial license terms are available from Sixty North AS if you wish to redistribute Segpy as
part of a proprietary closed source product or deliver software software-as-a-service (SaaS) using Segpy as part
of a proprietary closed source service.StatusBuild status:InstallationThesegpypackage is available on the Python Package Index (PyPI):The package supports Python 3 only. To install:$ pip install segpyWhat is Segpy?The SEG-Y file format is one of several standards developed by the Society of Exploration Geophysicists for storing
geophysical seismic data. It is an open standard, and is controlled by the SEG Technical Standards Committee, a
non-profit organization.This project aims to implement an open SEG-Y module in Python 3 for transporting seismic data between SEG-Y files and
Python data structures in pure Python.Basic UsageHere’s a short example which converts non-standard little-endian SEG-Y to standard big-endian SEG-Y:from segpy.reader import create_reader
from segpy.writer import write_segy

with open('seismic_little.sgy', 'rb') as segy_in_file:
    # The seg_y_dataset is a lazy-reader, so keep the file open throughout.
    seg_y_dataset = create_reader(segy_in_file, endian='<')  # Non-standard Rev 1 little-endian
    print(seg_y_dataset.num_traces())
    # Write the seg_y_dataset out to another file, in big-endian format
    with open('seismic_big.sgy', 'wb') as segy_out_file:
        write_segy(segy_out_file, seg_y_dataset, endian='>')  #  Standard Rev 1 big-endianThecreate_reader()function createsDatasetwhich lazily fetches traces from the file, which is why the
file must stay open for read for the duration of use of this dataset.  We override the default endian paramers, to
specify that the SEG-Y file we’re reading is in non-standard little-endian byte order.  On the last line of the
example we write theDatasetout to a different file, this time with standard compliant big-endian byte order.
Note that the input file must remain open as thewrite_segy()will only request one trace at a time from the
input dataset. This means overal memory usage is very low, and the program can handle arbitrarily large SEG-Y files.ContributingThe easiest way to contribute is to use Segpy submit reports for defects or any other issues you come across. Please
seeCONTRIBUTING.rstfor more details.DevelopmentSegpy was created by – and to meet the needs of – Sixty North.  If you require additional features, improved
performance, portability to earlier versions of Python, or specific defects fixed (such defects are marked ‘unfunded’
in the GitHub issue tracker) Sixty North’s experiencedSegpymaintainers may be available to perform
funded development work.  Enquire with Sixty North athttp://sixty-north.com.Segpy VersionsSegpy 2.0 is a complete re-imagining of a SEG-Y reader in Python 3 and represents a complete break from any and all older
versions of Segpy.  No attempt has been made to maintain API compatibility with earlier versions of Segpy and no code is
shared across versions.  Although earlier versions of Segpy were open source, they were never ‘released’ as such.
Earlier versions of Segpy are deprecated and completely unsupported.DevelopmentDeployment$ pip install -e .[dev]
$ bumpversion minor
$ python setup.py sdist bdist_wheel
$ twine upload –config-file <path>/sixty-north.pypirc dist/*
$ git push origin