noseplugin.py 文件源码

def _require(options, file_config):
    if not(options.require or
           (file_config.has_section('require') and
            file_config.items('require'))):
        return

    try:
        import pkg_resources
    except ImportError:
        raise RuntimeError("setuptools is required for version requirements")

    cmdline = []
    for requirement in options.require:
        pkg_resources.require(requirement)
        cmdline.append(re.split('\s*(<!>=)', requirement, 1)[0])

    if file_config.has_section('require'):
        for label, requirement in file_config.items('require'):
            if not label == db_label or label.startswith('%s.' % db_label):
                continue
            seen = [c for c in cmdline if requirement.startswith(c)]
            if seen:
                continue
            pkg_resources.require(requirement)