python Use in pip When installing the module , appear ：Fatal error in launcher resolvent 
I have encountered this problem , Worried for a long time , A lot of reference , The final discovery is The problem of environment variables . Too many bad environment variables are set .
terms of settlement ：
1. see pip Whether the path of the command is repeated ：cmd command ：where pip, There are indeed multiple paths as follows 
2. Copy environment variables path To txt in , Remove unwanted correlation paths , preservation , Reopen the console , Reuse pip Installation
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Click edit
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Choose , Just keep one
After operation , Click OK all the way , Be sure to click OK , Otherwise it won't work .
Enter again cmd Input pip Just fine 
