ModuleNotFoundError：即使在Pycharm中安装了pip请求之后，也没有名为“ requests”的模块

以前，“ requests”库在工作，但是我想做一个项目并安装一些库，并且库中包括“ requests == 2.22.0”。安装库之后，我发现在PyCharm上出现错误：

Traceback (most recent call last):
  File "C:/Users/User/Desktop/python/projects/youtube downloader.py", line 5, in <module>
    import requests
ModuleNotFoundError: No module named 'requests'

当我尝试再次使用pip安装请求时，不断出现这些错误，我也尝试卸载请求，然后重新安装：

C:\Users\User>pip3 install requests
Requirement already satisfied: requests in c:\users\muffin\anaconda3\lib\site-packages (2.21.0)
Requirement already satisfied: chardet<3.1.0,>=3.0.2 in c:\users\User\appdata\roaming\python\python37\site-packages (from requests) (3.0.4)
Requirement already satisfied: idna<2.9,>=2.5 in c:\users\User\appdata\roaming\python\python37\site-packages (from requests) (2.8)
Requirement already satisfied: urllib3<1.25,>=1.21.1 in c:\users\User\appdata\roaming\python\python37\site-packages (from requests) (1.24.1)
Requirement already satisfied: certifi>=2017.4.17 in c:\users\User\appdata\roaming\python\python37\site-packages (from requests) (2018.11.29)

C:\Users\User>pip install requests
Requirement already satisfied: requests in c:\users\muffin\anaconda3\lib\site-packages (2.21.0)
Requirement already satisfied: idna<2.9,>=2.5 in c:\users\User\appdata\roaming\python\python37\site-packages (from requests) (2.8)
Requirement already satisfied: chardet<3.1.0,>=3.0.2 in c:\users\User\appdata\roaming\python\python37\site-packages (from requests) (3.0.4)
Requirement already satisfied: urllib3<1.25,>=1.21.1 in c:\users\User\appdata\roaming\python\python37\site-packages (from requests) (1.24.1)
Requirement already satisfied: certifi>=2017.4.17 in c:\users\User\appdata\roaming\python\python37\site-packages (from requests) (2018.11.29)

我注意到我有两个？我的计算机中有python，但是我从来不知道该如何处理两个python（我将Ananconda用于Jupiter Notebook和PyCharm），并且我认为这可能是为什么pip无法按预期工作的问题。 。 或不。我很迷茫。

++因此，我在Jupiter笔记本中发现，我可以毫无问题地导入请求库，所以我认为我需要在其他路径下下载该库。

有人可以帮忙吗？提前非常感谢您。