Python2.7安裝ipython報錯解決

一、問題描述

使用pip安裝ipython pip install ipython，出現報錯

Using cached https://mirrors.aliyun.com/pypi/packages/71/bd/042e63027bea950da4e6f5545eb59b973868da854ab30a18128d3b884104/decorator-5.0.2.tar.gz (33 kB)
ERROR: Command errored out with exit status 1:
   command: /root/.pyenv/versions/2.7.17/bin/python2.7 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-Wp57Mm/decorator/setup.py'"'"';     __file__='"'"'/tmp/pip-install-Wp57Mm/decorator/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-pip-egg-info-kyIsC3
       cwd: /tmp/pip-install-Wp57Mm/decorator/
  Complete output (8 lines):
  Traceback (most recent call last):
    File "<string>", line 1, in <module>
    File "/tmp/pip-install-Wp57Mm/decorator/setup.py", line 4, in <module>
      exec(open('src/decorator.py').read(), dic)  # extract the __version__
    File "<string>", line 162
      print('Error in generated code:', file=sys.stderr)
                                            ^
  SyntaxError: invalid syntax
  ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

二、問題解決

按照網上搜索辦法，pip install --upgrade setuptools && python -m pip install --upgrade pip，升級setuptools和pip，依舊報錯。
嘗試下載ipython的whl包，本地安裝，下載地址https://www.lfd.uci.edu/~gohlke/pythonlibs/，下載完成，執行pip install ipython-5.8.0-py2-none-any.whl，依舊報錯。
然后仔細檢查報錯，發現錯誤發生前在Using cached https://mirrors.aliyun.com/pypi/packages/71/bd/042e63027bea950da4e6f5545eb59b973868da854ab30a18128d3b884104/decorator- 5.0.2.tar.gz (33 kB)，於是嘗試手動下載decorator‑4.4.1‑py2.py3‑none‑any.whl包到本地。
然后手動執行，pip install decorator-4.4.1-py2.py3-none-any.whl，再安裝ipython，pip install ipython-5.8.0-py2-none-any.whl，ok，問題解決。