solve VERSION.txt bug

[b4thesunrise]

Description

change .gitignore file
add back version,txt

Motivation and Context

#731

solve the problem of install qlib with pip install .

How Has This Been Tested?

• Pass the test by running: pytest qlib/tests/test_all_pipeline.py under upper directory of qlib.
• If you are adding a new feature, test on your own test scripts.

Screenshots of Test Results (if appropriate):

1. Pipeline test:
2. Your own tests:

Types of changes

• Fix bugs
• Add new feature
• Update documentation

[zhupr]

@b4thesunrise Hi,
When installing from source (python setup.py develop/install) will automatically copy src/VERSION.txt to src/qlib: https://github.com/microsoft/qlib/blob/main/setup.py#L20

[zhupr]

@b4thesunrise Hi,
pip install <source> will not execute the copyfile in setup.py.
Can you help to change the "version" of qlib to something like "pip", refer to: https://github.com/pypa/pip/blob/main/setup.py#L28

[b4thesunrise]

@b4thesunrise Hi, pip install <source> will not execute the copyfile in setup.py. Can you help to change the "version" of qlib to something like "pip", refer to: https://github.com/pypa/pip/blob/main/setup.py#L28

Hi! I am willing to offer help, so the problem is pip install <source> will cause the error of the lack of version.txt since the copy, so we want to get the version with function like get version in pip instead of use copyfile?

[zhupr]

@b4thesunrise Hi, pip install <source> will not execute the copyfile in setup.py. Can you help to change the "version" of qlib to something like "pip", refer to: https://github.com/pypa/pip/blob/main/setup.py#L28

Hi! I am willing to offer help, so the problem is pip install <source> will cause the error of the lack of version.txt since the copy, so we want to get the version with function like get version in pip instead of use copyfile?

Yes, you need to implement a get_version function to get the version from qlib/__init__.py

[b4thesunrise]

@b4thesunrise Hi, pip install <source> will not execute the copyfile in setup.py. Can you help to change the "version" of qlib to something like "pip", refer to: https://github.com/pypa/pip/blob/main/setup.py#L28

Hi! I am willing to offer help, so the problem is pip install <source> will cause the error of the lack of version.txt since the copy, so we want to get the version with function like get version in pip instead of use copyfile?

Yes, you need to implement a get_version function to get the version from qlib/__init__.py

got it, will work on it

[b4thesunrise]

have already followed the style of pypi and use black format, please give a review :)
I tried pip install . and run qlib again, the version.txt bug not occured on my machine then.

[you-n-g]

@b4thesunrise It looks great!
Thanks so much for your contribution.
Welcome to become Qlib's contributor!!

[b4thesunrise]

@b4thesunrise It looks great! Thanks so much for your contribution. Welcome to become Qlib's contributor!!

Thanks! My pleasure!