ModuleNotFoundError: No module named ‘pytest‘

stay pycharm The running program reported an error ,ModuleNotFoundError: No module named ‘pytest’
Search the , It turned out to be a naming problem ,py The file is named test_xxx.py, Should be test_ The first file will call pytest Module start , Then the lack of some statements or parameters in the file results in .
Solution ：
Change file name to test1_xx.py And it's going to work .