pycharm 使用pip3更新插件已经更新时报错

修改文件路径：C:Program FilesJetBrainsPyCharm 2017.2helperspackaging_tool.py

添加修改的内容：

# 添加
import pip._internal as pip_new


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

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