Fix 'W605 invalid escape sequence' errors from pycodestyle

common/lib/calc/calc/tests/test_calc.py

@@ -537,13 +537,13 @@ class EvaluatorTest(unittest.TestCase):
         """
         variables = {'R1': 2.0, 'R3': 4.0}
 
-        with self.assertRaisesRegexp(calc.UndefinedVariable, 'QWSEKO'):
+        with self.assertRaisesRegexp(calc.UndefinedVariable, r'QWSEKO'):
             calc.evaluator({}, {}, "5+7*QWSEKO")
-        with self.assertRaisesRegexp(calc.UndefinedVariable, 'r2'):
+        with self.assertRaisesRegexp(calc.UndefinedVariable, r'r2'):
             calc.evaluator({'r1': 5}, {}, "r1+r2")
-        with self.assertRaisesRegexp(calc.UndefinedVariable, 'r1, r3'):
+        with self.assertRaisesRegexp(calc.UndefinedVariable, r'r1, r3'):
             calc.evaluator(variables, {}, "r1*r3", case_sensitive=True)
-        with self.assertRaisesRegexp(calc.UndefinedVariable, 'did you forget to use \*'):
+        with self.assertRaisesRegexp(calc.UndefinedVariable, r'did you forget to use \*'):
             calc.evaluator(variables, {}, "R1(R3 + 1)")
 
     def test_mismatched_parens(self):

common/lib/capa/capa/tests/test_responsetypes.py

@@ -647,7 +647,7 @@ class StringResponseTest(ResponseTest):  # pylint: disable=missing-docstring
         for answer in answers:
             self.assert_grade(problem, answer, "correct")
 
-        problem = self.build_problem(answer="^(-\|){2,5}$", case_sensitive=False, regexp=True)
+        problem = self.build_problem(answer=r"^(-\|){2,5}$", case_sensitive=False, regexp=True)
         self.assert_grade(problem, "-|-|-|", "correct")
         self.assert_grade(problem, "-|", "incorrect")
         self.assert_grade(problem, "-|-|-|-|-|-|", "incorrect")

common/test/acceptance/tests/discussion/test_discussion.py

@@ -1002,9 +1002,9 @@ class DiscussionEditorPreviewTest(UniqueCourseTest):
         appear in the preview box
         """
         self.page.set_new_post_editor_value(
-            '\\begin{equation}'
-            '\\tau_g(\omega) = - \\frac{d}{d\omega}\phi(\omega) \hspace{2em} (1) '
-            '\\end{equation}'
+            r'\begin{equation}'
+            r'\tau_g(\omega) = - \frac{d}{d\omega}\phi(\omega) \hspace{2em} (1) '
+            r'\end{equation}'
         )
         self.assertIsNotNone(self.page.get_new_post_preview_text())
         self.page.click_element(".cancel")

openedx/core/djangoapps/coursegraph/management/commands/tests/test_dump_to_neo4j.py

@@ -41,7 +41,7 @@ class TestDumpToNeo4jCommandBase(SharedModuleStoreTestCase):
     """
     @classmethod
     def setUpClass(cls):
-        """
+        r"""
         Creates two courses; one that's just a course module, and one that
         looks like:
                         course

openedx/core/djangoapps/user_api/accounts/utils.py

@@ -82,7 +82,7 @@ def _get_username_from_social_link(platform_name, new_social_link):
     parse_result = urlparse(new_social_link)
     url_domain_and_path = parse_result[1] + parse_result[2]
     url_stub = re.escape(settings.SOCIAL_PLATFORMS[platform_name]['url_stub'])
-    username_match = re.search('(www\.)?' + url_stub + '(?P<username>.*?)[/]?$', url_domain_and_path, re.IGNORECASE)
+    username_match = re.search(r'(www\.)?' + url_stub + r'(?P<username>.*?)[/]?$', url_domain_and_path, re.IGNORECASE)
     if username_match:
         username = username_match.group('username')
     else:

scripts/xsslint/xsslint/linters.py

@@ -173,7 +173,7 @@ class BaseLinter(object):
         """
         if self.LINE_COMMENT_DELIM is not None:
             line_start_index = StringLines(template).index_to_line_start_index(start_index)
-            uncommented_line_start_index_regex = re.compile("^(?!\s*{})".format(self.LINE_COMMENT_DELIM), re.MULTILINE)
+            uncommented_line_start_index_regex = re.compile(r"^(?!\s*{})".format(self.LINE_COMMENT_DELIM), re.MULTILINE)
             # Finds the line start index of the first uncommented line, including the current line.
             match = uncommented_line_start_index_regex.search(template, line_start_index)
             if match is None:
@@ -1160,8 +1160,8 @@ class MakoTemplateLinter(BaseLinter):
         # Dedent expression internals so it is parseable.
         # Note that the final columns reported could be off somewhat.
         adjusted_python_code = textwrap.dedent(python_code)
-        first_letter_match = re.search('\w', python_code)
-        adjusted_first_letter_match = re.search('\w', adjusted_python_code)
+        first_letter_match = re.search(r'\w', python_code)
+        adjusted_first_letter_match = re.search(r'\w', adjusted_python_code)
         if first_letter_match is not None and adjusted_first_letter_match is not None:
             start_offset += (first_letter_match.start() - adjusted_first_letter_match.start())
         python_code = adjusted_python_code