更新pip之后，Pycharm安装package出现报错：module 'pip' has no attribute'main'
找到安装目录下 helpers/packaging_tool.py文件，找到如下代码：
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)
修改为如下，保存即可。
def do_install(pkgs):
try:
# import pip
try:
from pip._internal importmain
except Exception:
from pip import main
except ImportError:
error_no_pip()
return main(['install'] + pkgs)
def do_uninstall(pkgs):
try:
# import pip
try:
from pip._internal importmain
except Exception:
from pip import main
except ImportError:
error_no_pip()
return main(['uninstall', '-y'] +pkgs)