Problem description

• Many times you use pycharm Use habits , Everything is ready , But it ignores many path problems , Occasionally need to work with other environments 、 When the platform interacts , For example, I wrote a C# Program to call python Excuse for , Equivalent to terminal Start by transmitting parameters , This time will show a variety of No module problem

terms of settlement

• The reason is , Because the external environment is calling python At the interface , Go to your program to find each module, But if these module Has not been added to the environment variable , Then you won't find , Therefore, it is recommended to use the following statements in each used py At the beginning of the file

sys.path.append(os.path.dirname(os.path.abspath(__file__)) + '/../')

• This operation can add the entire upper level directory of the current file to the environment variable , In this way, you can easily call all the files under the upper directory
• If you have many levels of directories , The current directory is in a deep location , Then you can change this command a little , In short, include all the files and directories you want to use , Such as can be

sys.path.append(os.path.dirname(os.path.abspath(__file__)) + '/../../')

• Of course, if you just want to call all directories under the current folder , Then you can use it

sys.path.append(os.path.dirname(os.path.abspath(__file__)) + './')

summary

• A lot of times terminal Run appears no module The errors are probably caused by the fact that the current folder has no environment variables
• Try the above command , Add the following path to the environment variable as much as possible , That is, it can be called at will