Collection of Python operation problems (long-term update): pycharm can be run, and the terminal reports an error and cannot find the package it created;

1. PyCharm Can run , But running at the terminal py Code hinting ModuleNotFoundError: No module named ‘xxx‘ resolvent

（1） reason
because PyCharm Start the interpreter （Interpreter） When It will not only be imported into environment variables sys.path Discovered modules , It will also import modules under the current working directory . When you are in IDLE When starting the interpreter in , The current working directory is the project directory , Can smoothly call modules in the same project ;

But when you When starting from the command line , The current working directory is the directory where you started the interpreter （ namely python Installation directory ）, If the location is not the project directory , Then the modules in the project directory will not be found .

（2） solve
Add ：

import sys
sys.path.append(" Project absolute path ") # Ensure that when the terminal is running , Can be retrieved to the directory