関連ワード:  pip install python 2.7    pip install python 2    pip install python 2.7 linux    pip install python 2.7 windows    pip install python 2 instead of 3    pip install python 2.7 windows 7    pip install python 2.6    pip install python 2.7 18    pip install python 2captcha    pip install python 2.7 mac