Created
September 30, 2022 07:34
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Get an imported module's qualified name by its file path.
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| _path2modname = {} | |
| def Filepath2ModuleName(filepath): | |
| ''' Get an imported module's qualified name by its file path. | |
| Return `None` if the module is not found or is not imported. | |
| ## Usage | |
| ``` python | |
| from pkg import mod | |
| mod_name = Filepath2ModuleName("./pkg/mod.py") | |
| assert(mod_name == mod.__name__) | |
| assert(mod_name == "pkg.mod") | |
| ``` | |
| ## Implementation | |
| Just iterate each module in `sys.modules`. | |
| So the module must have been imported. | |
| A memo var `_path2modname` is used to avoid duplicate searching. | |
| ''' | |
| name: str = _path2modname.get(filepath, None) | |
| if not name is None: | |
| return name | |
| import os.path | |
| import sys | |
| name: str = None | |
| for k_name, mod in sys.modules.items(): | |
| k_path = getattr(mod, "__file__", None) | |
| if k_path is None: | |
| continue | |
| if os.path.samefile(mod.__file__, filepath): | |
| name = k_name | |
| break | |
| if not name is None: | |
| _path2modname[filepath] = name | |
| return name |
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