PIP command -fatal error in launcher: unable to create process using How to resolve the error after migrating the virtual environment?

Catalog

One 、 background

Two 、 Problem solving log / Search history

3、 ... and 、“ This exception is caused by the migration environment ” Solutions

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One 、 background

python edition 3.8.

Because the author just started to learn python Do not understand the virtual environment , So the virtual environment is installed in a temporary folder . Now? , I want to package the virtual environment that has downloaded a large number of package libraries into another official folder , But after cutting and pasting , It is found that even if the virtual environment is activated , It doesn't work pip Instructions . See the following code for details , The environment is Windows Of cmd Black window .

(venv) D:\Program Files\python\venv38\py-cv-learning\Scripts>pip list

 Here is the error log ：
Fatal error in launcher: Unable to create process using '"D:\BaiduNetdiskDownload\pycharm\venv\Scripts\python.exe"  "D:\Program Files\python\venv38\py-cv-learning\Scripts\pip.exe" list': ???????????

The contents in parentheses before the path from above are venv（ This is the name of the folder where I put the virtual environment ）, It can also be seen that , This problem is probably caused by the old parameters not being changed in time due to my violent migration environment .  If the virtual environment is activated normally , The contents in brackets should be py-cv-learning.

Two 、 Problem solving log / Search history

Search online 【Fatal error in launcher: Unable to create process using】, The solution for most tutorials is as follows ：

（1） If the path contains Chinese , Change it ; especially Windows The system pays special attention to this problem .

（2） Update pip, Use command 【python -m pip install --upgrade】. If it is the latest version , You need to use the forced installation command 【python -m pip install --upgrade --force-reinstall pip】.

（3）repair once , I don't know the specific method , I guess it's the following picture , But it seems that this method can only repair the system python Environment ？？ I don't know very well , I hope the wise readers can point out .

（4） The next article  https://blog.csdn.net/m0_50796573/article/details/112697889 , The prompt may be an error caused by the migration environment , The specific reason is that pip.exe The file actually contains the absolute path left by the original virtual environment , It's no use opening it with Notepad , Because this file is a hexadecimal file , It cannot be viewed and modified normally in a natural language well known to humans . Then , The author recommended software 【HEdit】 To make changes , You need to use it 【 The telescope 】 function .

3、 ... and 、“ This exception is caused by the migration environment ” Solutions

Because in the second part of this article （4） The method given in the article in is more complicated , I changed my mind again .

Baidu search 【 Directly copy virtual environment files pip error 】, Get articles 「https://blog.csdn.net/qq_29941979/article/details/121524270」, This method is good , I just tried , Sure enough ！ But I'm not like him , my pip The version is the latest , But I didn't update it after installing the lower version , Instead, you use the command directly 【python -m pip install --upgrade --force-reinstall pip】, One time forced uninstall and then install the latest version .

Here are the specific steps ：

        step （1）： Put it in a virtual environment script Under folder activate Document and activate.dat The absolute address of the old virtual environment in the file is changed to the new address . For example, my old address is the circled part below , Change to new address 【D:\Program Files\python\venv38\py-cv-learning】. Be careful , This part of the two files , Very similar ！

          step （2）： Activate the virtual environment in the new address , Then use the command 【python -m pip install --upgrade --force-reinstall pip】.

          step （3）： Last , Check to see if the problem is solved successfully , Operation instruction 【pip -V】, Found normal call to pip Version and absolute address of , Successfully solved ！！！