Pycharm 报AttributeError: module 'pip' has no attribute 'main'

      最近升级了pip，再建Django项目得时候，Pycharm报AttributeError: module 'pip' has no attribute 'main'的错误，如图：

解决办法：根据提示找到pycharm安装目录下的\helpers\packaging_tool.py，打开找到以下代码

def do_install(pkgs):
    try:
        import pip
    except ImportError:
        error_no_pip()
    return pip.main(['install'] + pkgs)


def do_uninstall(pkgs):
    try:
        import pip
    except ImportError:
        error_no_pip()
    return pip.main(['uninstall', '-y'] + pkgs)

并替换成以下代码保存：

def do_install(pkgs):
    try:
        #import pip
        try:
            from pip._internal import main
        except Exception:
            from pip import main
    except ImportError:
        error_no_pip()
    #return pip.main(['install'] + pkgs)
    return main(['install'] + pkgs)


def do_uninstall(pkgs):
    try:
        #import pip
        try:
            from pip._internal import main
        except Exception:
            from pip import main
    except ImportError:
        error_no_pip()
    #return pip.main(['uninstall', '-y'] + pkgs)
    return main(['uninstall', '-y'] + pkgs)