Python uses view the current module search path

Functional explanation

The following is aboutDetailed explanation:

1. use：
   • Determines the search order of the Python interpreter when importing modules.
   • It helps you organize your code and ensure that modules can be imported correctly.
2. composition：
   • It usually consists of the following parts:
     • The directory where the current script is located.
     • The directory where PYTHONPATH (environment variable) is set.
     • The default library path when installing Python (for example:lib//site-packages）。
3. Check：
   • You can view it in the Python interpreter through the following codeContent:

import sys
print()

• Revise：
  • You can modifyTo add or delete search paths, for example:

import sys
('/path/to/your/module')

1. • Note: ModifyThe operation should be done with caution, as this may affect the import of modules.
2. Things to note：
   • When you are importing a module, it is likely that it is because the path where the module is located is not.middle.
   • In some cases, it is recommended to use absolute import rather than relative import to prevent path problems.
3. Example：
   Suppose you have the following file structure:

project/
├── 
└── my_module/
    └── my_module.py

exist, you want to importmy_module.py. ifproject/Not here, you will encounter an import error. In this case, you can modify：

import sys
('/path/to/project')
import my_module.my_module

Anyway, understandIt is very important for module import and Python project organization. Correct configurationIt can help you manage your code and dependencies more effectively.

Operation example

Here are the steps to view and operate:

Check

First, you need to import Python's sys module because it is part of the sys module.
You can then view the current module search path by printing.

Here is a simple example:

import sys
# Print the current module search pathprint()

After running this code, you will see the output current list, which contains the directory where the Python interpreter looks for modules.

Revise

If you want to add or modify the search path of a module, you can directly modify the list. For example, add a new directory to the search path:

import sys
# Add a new directory to the search pathnew_directory = '/path/to/your/module'
if new_directory not in :
    (new_directory)
# Print again to view the modified pathprint()

Things to note

Modification will affect all module search operations in the current Python process, so it needs to be done with caution.

The added directory must be a valid Python module directory (i.e., a directory containing the __init__.py file, or in Python 3.3 and above, it can be a directory containing the __init__.pyi file).

When using third-party libraries or modules, make sure their installation location is included, otherwise the Python interpreter will not be able to find and import these modules.

Through the above method, you can easily view and modify Python's module search path.

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