solved issue with importing from local files (#163)

* solved issue with importing from files in same directory begin marked as missing dependencies

deptry/import_parser.py

@@ -13,7 +13,8 @@
 class ImportParser:
     """
     Class to scan Python files or Python code for import statements. Scanning is done by creating the abstract syntax tree
-    and extracting all nodes that contain import statements.
+    and extracting all nodes that contain import statements. For each file, imports from files in the same directory as the file that is being
+    scanned are excluded.
     """
 
     def __init__(self) -> None:
@@ -29,6 +30,7 @@ def get_imported_modules_for_list_of_files(self, list_of_files: List[Path]) -> L
         return unique_modules
 
     def get_imported_modules_from_file(self, path_to_file: Path) -> List[str]:
+        logging.debug(f"Scanning {path_to_file}...")
         try:
             if str(path_to_file).endswith(".ipynb"):
                 modules = self._get_imported_modules_from_ipynb(path_to_file)
@@ -39,6 +41,7 @@ def get_imported_modules_from_file(self, path_to_file: Path) -> List[str]:
         except AttributeError as e:
             logging.warning(f"Warning: Parsing imports for file {str(path_to_file)} failed.")
             raise (e)
+        modules = self._remove_local_file_imports(modules, path_to_file)
         return modules
 
     def get_imported_modules_from_str(self, file_str: str) -> List[str]:
@@ -122,3 +125,26 @@ def _filter_exceptions(modules: List[str]) -> List[str]:
     def _get_file_encoding(file_name: Union[str, Path]) -> str:
         with open(file_name, "rb") as f:
             return chardet.detect(f.read())["encoding"]
+
+    @staticmethod
+    def _remove_local_file_imports(modules: List[str], path_to_file: Path) -> List[str]:
+        """
+        This omits imported modules from .py files in the same directory from the list of modules. consider the following directory:
+
+        dir
+         - foo.py
+         - bar.py
+
+        In this case, if foo.py any imports from bar.py such as 'from bar import x', we do not want 'bar'
+        to be included in the list of module that foo imports from.
+        """
+        current_directory = path_to_file.parent
+        py_files_in_same_dir = [p.stem for p in current_directory.iterdir() if p.is_file() and p.suffix == ".py"]
+        local_files_imported = list(set(modules) & set(py_files_in_same_dir))
+        if len(local_files_imported) > 0:
+            logging.debug(
+                f"Imports {local_files_imported} found to be imports from local .py files. Removing them from the list"
+                " of imported modules."
+            )
+            return [module for module in modules if module not in py_files_in_same_dir]
+        return modules

tests/test_import_parser.py

@@ -129,6 +129,17 @@ def test_import_parser_file_encodings(tmp_path):
         assert set(imported_modules) == {"foo"}
 
 
+def test_remove_local_file_imports(tmp_path):
+    with run_within_dir(tmp_path):
+        with open("foo.py", "w", encoding="utf-8") as f:
+            f.write("import hobbes\nimport bar\nfrom bar import x")
+        with open("bar.py", "w", encoding="utf-8") as f:
+            f.write("def x():\tprint('hello')")
+
+        imported_modules = ImportParser().get_imported_modules_from_file(Path("foo.py"))
+        assert imported_modules == ["hobbes"]
+
+
 def test_import_parser_file_encodings_warning(tmp_path, caplog):
     with run_within_dir(tmp_path):
         with open("file1.py", "w", encoding="utf-8") as f: