pycharm安装第三方库时报错: Try to run this command from the system terminal. Make sure that you use the correct version of 'pip' installed for your Python interpreter located at

安装第三方库，提示：

Try to run this command from the system terminal. Make sure that you use the correct version of 'pip' installed for your Python interpreter located at 'D:\Programming\Python_Virtaul_Env\Python_Study\newvenv\Scripts\python.exe'.

原因和解决办法

1.pycharm里安装的pip与电脑中按照的pip版本不一致

 1）setting->project-project Interprete->查看pip的版本为19.2， 

     在cmd中查看： pip list  -->安装的pip版本为21.3.1

   解决方法1：setting->project-project Interpreter->点击pip->右侧找到pip的版本选21.3.1，安装完成。

  解决方法2：使用方法1，可能还是提示无法安装，这时可以尝试先卸载，然后再安装

python3-m pip install --upgrade pip --force-reinstall

python -m pip uninstall pip

pycharm Terminal 中执行:

先下载：
https://bootstrap.pypa.io/get-pip.py然后切换到对应目录，
再执行：python get-pip.py
检查安装的版本，在cmd或 pycharm Terminal 中执行:
>>pip --version

 【https://www.cnblogs.com/yaradish/p/10632246.html】

  解决方法3：尝试 切换下载源可能会解决问题

                     https://mirrors.aliyun.com/pypi/simple/

                    https://pypi.tuna.tsinghua.edu.cn/simple/

  解决方法4：

将对应虚拟环境\Lib\site-packages\目录下的pip文件夹删除，

然后重新安装，或者从python的安装目录拷贝一份过来，包括：pip文件夹和setup文件夹

  D:\Programs\Python\Python38-32\Lib\site-packages

 

  

  解决方法5：直接使用命令行安装

pip install --trusted-host pypi.tuna.tsinghua.edu.cn -i https://pypi.tuna.tsinghua.edu.cn/simple  flask

或者使用执行如下python脚本，调用命令行来安装

#coding:utf-8
import os
pipName = input("请输入pip名字:")
cmdstr = ("pip install "+ pipName +" -i http://pypi.douban.com/simple/ --trusted-host pypi.douban.com")
information = os.popen(cmdstr)
re = information.read()
print(re)

# cmd函数
def popen(cmd, mode="r", buffering=-1):
    if not isinstance(cmd, str):
        raise TypeError("invalid cmd type (%s, expected string)" % type(cmd))
    if mode not in ("r", "w"):
        raise ValueError("invalid mode %r" % mode)
    if buffering == 0 or buffering is None:
        raise ValueError("popen() does not support unbuffered streams")
    import subprocess, io
    if mode == "r":
        proc = subprocess.Popen(cmd,
                                shell=True,
                                stdout=subprocess.PIPE,
                                bufsize=buffering)
        return os._wrap_close(io.TextIOWrapper(proc.stdout), proc)
    else:
        proc = subprocess.Popen(cmd,
                                shell=True,
                                stdin=subprocess.PIPE,
                                bufsize=buffering)
        return os._wrap_close(io.TextIOWrapper(proc.stdin), proc)