Convert regexes of type str to list (#831)

* convert regexes of type str to list

* > tests added
> updated changelog.rst

Author: unique1o1

changelog.rst

@@ -8,8 +8,8 @@ Changelog
 
 2021-xx-xx • `full history <https://github.com/gorakhargosh/watchdog/compare/v2.1.4...master>`__
 
--
-- Thanks to our beloved contributors: @
+- convert regexes of type str to list. (`#831 <https://github.com/gorakhargosh/watchdog/pull/831>`_)
+- Thanks to our beloved contributors: @unique1o1
 
 2.1.4
 ~~~~~

src/watchdog/events.py

@@ -418,6 +418,8 @@ def __init__(self, regexes=None, ignore_regexes=None,
 
         if regexes is None:
             regexes = [r".*"]
+        elif isinstance(regexes, str):
+            regexes = [regexes]
         if ignore_regexes is None:
             ignore_regexes = []
         if case_sensitive:

tests/test_regex_matching_event_handler.py

@@ -35,6 +35,7 @@
 path_1 = '/path/xyz'
 path_2 = '/path/abc'
 g_allowed_regexes = [r".*\.py", r".*\.txt"]
+g_allowed_str_regexes = r".*\.py"
 g_ignore_regexes = [r".*\.pyc"]
 
 
@@ -186,6 +187,12 @@ def test_regexes():
     assert [r.pattern for r in handler1.regexes] == g_allowed_regexes
 
 
+def test_str_regexes():
+    handler1 = RegexMatchingEventHandler(g_allowed_str_regexes,
+                                         g_ignore_regexes, True)
+    assert [r.pattern for r in handler1.regexes] == [g_allowed_str_regexes]
+
+
 def test_logging_event_handler_dispatch():
 
     class _TestableEventHandler(LoggingEventHandler):