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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def check_requires_python(requires_python):
 # type: (Optional[str]) -> bool """ Check if the python version in use match the `requires_python` specifier. Returns `True` if the version of python in use matches the requirement. Returns `False` if the version of python in use does not matches the requirement. Raises an InvalidSpecifier if `requires_python` have an invalid format. """

    if requires_python is None:
        # The package provides no information
        return True
    requires_python_specifier = specifiers.SpecifierSet(requires_python)

    # We only use major.minor.micro
    python_version = version.parse('{0}.{1}.{2}'.format(*sys.version_info[:3]))
    return python_version in requires_python_specifier