[Python] ImportError: cannot import name HashMissing

不知道為什麼 virtualEnv 爛掉了, 只要執行 pip 就會出現 ImportError: cannot import name HashMissing

假設 virtural env 的名稱為 ve, 就砍掉重鍊吧

rm -r ve/lib/python2.7/site-packages/{pip,setuptools} ve/lib/python2.7/site-packages/setuptools-* ve/lib/python2.7/site-packages/pip-*
virtualenv ve
source ve/bin/activate
pip install -U pip setuptools

https://stackoverflow.com/questions/43047336/how-to-solve-hashmissing-using-pip-in-python-2-7