解决pip升级问题

pip show pip 出现以下问题

• WARNING: pip is being invoked by an old script wrapper. This will fail in a future version of pip. Please see
  https://github.com/pypa/pip/issues/5599 for advice on fixing the
  underlying issue. To avoid this problem you can invoke Python with
  ‘-m pip’ instead of running pip directly

直接删除

• python -m pip uninstall pip

更新

• pip install --upgrade pip