pip（或setuptools，distribution等…）能否列出每个已安装软件包使用的许可证？

pip（或setuptools，distribution等…）能否列出每个已安装软件包使用的许可证？

您可以使用

pkg_resources

：

import pkg_resourcesdef get_pkg_license(pkgname):    """    Given a package reference (as from requirements.txt),    return license listed in package metadata.    NOTE: This function does no error checking and is for    demonstration purposes only.    """    pkgs = pkg_resources.require(pkgname)    pkg = pkgs[0]    for line in pkg.get_metadata_lines('PKG-INFO'):        (k, v) = line.split(': ', 1)        if k == "License": return v    return None

使用示例：

>>> get_pkg_license('mercurial')'GNU GPLv2+'>>> get_pkg_license('pytz')'MIT'>>> get_pkg_license('django')'UNKNOWN'