Issue on importing Python Library

Background

• I am on MacOS 10.14.5.
• I currently cannot import any Python third-party Library from anywhere (including VSCode, Pycharm and terminal).

Detail

• For example, I have been using pip3 install pandas to download the Python Library:

pip3 list

Package           Version 
----------------- --------
astroid           2.2.5   
beautifulsoup4    4.7.1   
certifi           2019.3.9
chardet           3.0.4   
idna              2.8     
isort             4.3.16  
lazy-object-proxy 1.3.1   
mccabe            0.6.1   
numpy             1.16.4  
panda             0.3.1   
pandas            0.25.0  

• However, I just cannot import it:

python3

Python 3.7.2 (v3.7.2:9a3ffc0492, Dec 24 2018, 02:44:43) 
[Clang 6.0 (clang-600.0.57)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import pandas
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'pandas

• (Same problem exists in any other editor)

• Also, when I am trying to install Libraries by Pycharm, it reports:

  Collecting pandas

  Could not install packages due to an EnvironmentError: Missing dependencies for SOCKS support.

• However, even after turning off the proxy, the problem still exists.

If there is any other operations needed for diagnosis, please tell me! Thanks for helping!