Running hashin with Python versions >= 3.10 raises PackageError('No releases can be found....')

[vishnuwazoku]

The issue seems to stem from this piece of code.

def expand_python_version(version):
    if not re.match(r"^\d\.\d$", version):
        return [version]

The above regular expression assumes the minor version number can have only a single digit. Therefore the result will be incorrect for Python versions >= 3.10.

We probably want to change it to

    if not re.match(r"^\d\.\d*\d$", version)

[hartwork]

For a reproducer:

FROM python:3.10
RUN pip3 install hashin \
        && \
    touch requirements.txt \
        && \
    hashin -r requirements.txt -p 3.10 hashin

It takes:

• a) calling function expand_python_version from third party Python code or
• b) use of argument -p PYTHON_VERSION on the command line