解决Python安装库时出现的Requirement already satisfied问题_python requirement already satisfied:

uirement already satisfied的问题当我们用pip install + 库名时，出现了下面

Requirement already satisfied WARNING: Ignoring invalid distribution -ip 的问题

对于这样的问题，解决办法就是在 pip install 后加 - -target=你所要添加的库文件地址(注意：target前为两个-，并且没有空格) 再加 库名
一般来说地址就是错误提示后的这串地址 

示例代码：

pip install --target=d:\python\lib\site-packages Django

pip install --target=h:\users\29187\appdata\local\programs\python\python37\lib\site-packages requests

如果还有问题 可以备份改文件夹下 d:\python\lib\site-packages波浪线开头的文件夹，然后删除

~ip-20.2.dist-info 备份删除
~ip  备份删除

假如继续输出：Collecting xlwt
  Using cached xlwt-1.3.0-py2.py3-none-any.whl (99 kB)
Installing collected packages: xlwt
Successfully installed xlwt-1.3.0
WARNING: Target directory d:\anaconda\lib\site-packages\xlwt already exists. Specify --upgrade to force replacement.
WARNING: Target directory d:\anaconda\lib\site-packages\xlwt-1.3.0.dist-info already exists. Specify --upgrade to force replacement.

解决办法：在原本代码的末端加上“ --upgrade”，注

输入：pip install --target=d:\anaconda\lib\site-packages xlwt --upgrade