add support for .pyw files

Now, pipreqs will also scan imports in .pyw files by default.

pipreqs/pipreqs.py

@@ -52,7 +52,7 @@ from yarg.exceptions import HTTPError
 from pipreqs import __version__
 
 REGEXP = [re.compile(r"^import (.+)$"), re.compile(r"^from ((?!\.+).*?) import (?:.*)$")]
-
+DEFAULT_EXTENSIONS = [".py", ".pyw"]
 
 scan_noteboooks = False
 
@@ -126,7 +126,7 @@ def get_all_imports(path, encoding="utf-8", extra_ignore_dirs=None, follow_links
         dirs[:] = [d for d in dirs if d not in ignore_dirs]
 
         candidates.append(os.path.basename(root))
-        py_files = [file for file in files if file_ext_is_allowed(file, [".py"])]
+        py_files = [file for file in files if file_ext_is_allowed(file, DEFAULT_EXTENSIONS)]
         candidates.extend([os.path.splitext(filename)[0] for filename in py_files])
 
         files = [fn for fn in files if file_ext_is_allowed(fn, extensions)]
@@ -172,11 +172,11 @@ def get_all_imports(path, encoding="utf-8", extra_ignore_dirs=None, follow_links
 
 
 def get_file_extensions():
-    return [".py", ".ipynb"] if scan_noteboooks else [".py"]
+    return DEFAULT_EXTENSIONS + [".ipynb"] if scan_noteboooks else DEFAULT_EXTENSIONS
 
 
 def read_file_content(file_name: str, encoding="utf-8"):
-    if file_ext_is_allowed(file_name, [".py"]):
+    if file_ext_is_allowed(file_name, DEFAULT_EXTENSIONS):
         with open(file_name, "r", encoding=encoding) as f:
             contents = f.read()
     elif file_ext_is_allowed(file_name, [".ipynb"]) and scan_noteboooks:

tests/_data_pyw/py.py

@@ -0,0 +1,5 @@
+import airflow
+import numpy
+
+airflow
+numpy

tests/_data_pyw/pyw.pyw

@@ -0,0 +1,3 @@
+import matplotlib
+import pandas
+import tensorflow

tests/test_pipreqs.py

@@ -629,6 +629,45 @@ class TestPipreqs(unittest.TestCase):
         assert os.path.exists(notebook_requirement_path) == 1
         assert os.path.getsize(notebook_requirement_path) == 1    # file only has a "\n", meaning it's empty
 
+    def test_pipreqs_get_imports_from_pyw_file(self):
+        pyw_test_dirpath = os.path.join(os.path.dirname(__file__), "_data_pyw")
+        requirements_path = os.path.join(pyw_test_dirpath, "requirements.txt")
+
+        pipreqs.init(
+            {
+                "<path>": pyw_test_dirpath,
+                "--savepath": None,
+                "--print": False,
+                "--use-local": None,
+                "--force": True,
+                "--proxy": None,
+                "--pypi-server": None,
+                "--diff": None,
+                "--clean": None,
+                "--mode": None,
+            }
+        )
+
+        self.assertTrue(os.path.exists(requirements_path))
+
+        expected_imports = [
+            "airflow",
+            "matplotlib",
+            "numpy",
+            "pandas",
+            "tensorflow",
+        ]
+
+        with open(requirements_path, "r") as f:
+            imports_data = f.read().lower()
+            for _import in expected_imports:
+                self.assertTrue(
+                    _import.lower() in imports_data,
+                    f"'{_import}' import was expected but not found.",
+                )
+
+        os.remove(requirements_path)
+
     def mock_scan_notebooks(self):
         pipreqs.scan_noteboooks = Mock(return_value=True)
         pipreqs.handle_scan_noteboooks()