setup.py
def is_requirement(line):
    """
    Return True if the requirement line is a package requirement;
    that is, it is not blank, a comment, a URL, or an included file.
    """
    return line and not line.startswith(('-r', '#', '-e', 'git+', '-c'))

    Return True if the requirement line is a package requirement;
    that is, it is not blank, a comment, a URL, or an included file.
    
Return True if the requirement line is a package requirement;
that is, it is not blank, a comment, a URL, or an included file.
Return True if the requirement line is a package requirement ; that is it is not blank a comment a URL or an included file .
def is_requirement(line):
    return line and not line.startswith(('-r', '#', '-e', 'git+', '-c'))
def is_requirement ( line ) : return line and not line . startswith ( ( '-r' , '#' , '-e' , 'git+' , '-c' ) )
Return True if the requirement line is a package requirement;
that is, it is not blank, a comment, a URL, or an included file.
Return True if the requirement line is a package requirement ; that is it is not blank a comment a URL or an included file .
"""
    Return True if the requirement line is a package requirement;
    that is, it is not blank, a comment, a URL, or an included file.
    """
line