escaping for regexes

.flake8

@@ -1,3 +1,3 @@
 [flake8]
-ignore = E231,E203,W605,W503
+ignore = E231,E203,W503
 max-line-length = 88

pytube/cipher.py

@@ -198,14 +198,14 @@ def map_functions(js_func):
     """
     mapper = (
         # function(a){a.reverse()}
-        ("{\w\.reverse\(\)}", reverse),
+        (r"{\w\.reverse\(\)}", reverse),
         # function(a,b){a.splice(0,b)}
-        ("{\w\.splice\(0,\w\)}", splice),
+        (r"{\w\.splice\(0,\w\)}", splice),
         # function(a,b){var c=a[0];a[0]=a[b%a.length];a[b]=c}
-        ("{var\s\w=\w\[0\];\w\[0\]=\w\[\w\%\w.length\];\w\[\w\]=\w}", swap),
+        (r"{var\s\w=\w\[0\];\w\[0\]=\w\[\w\%\w.length\];\w\[\w\]=\w}", swap),
         # function(a,b){var c=a[0];a[0]=a[b%a.length];a[b%a.length]=c}
         (
-            "{var\s\w=\w\[0\];\w\[0\]=\w\[\w\%\w.length\];" "\w\[\w\%\w.length\]=\w}",
+            r"{var\s\w=\w\[0\];\w\[0\]=\w\[\w\%\w.length\];\w\[\w\%\w.length\]=\w}",
             swap,
         ),
     )

pytube/helpers.py

@@ -89,26 +89,26 @@ def safe_filename(s: str, max_length: int = 255) -> str:
     # Characters in range 0-31 (0x00-0x1F) are not allowed in ntfs filenames.
     ntfs_characters = [chr(i) for i in range(0, 31)]
     characters = [
-        '"',
-        "\#",
-        "\$",
-        "\%",
-        "'",
-        "\*",
-        "\,",
-        "\.",
-        "\/",
-        "\:",
-        '"',
-        "\;",
-        "\<",
-        "\>",
-        "\?",
-        "\\",
-        "\^",
-        "\|",
-        "\~",
-        "\\\\",
+        r'"',
+        r"\#",
+        r"\$",
+        r"\%",
+        r"'",
+        r"\*",
+        r"\,",
+        r"\.",
+        r"\/",
+        r"\:",
+        r'"',
+        r"\;",
+        r"\<",
+        r"\>",
+        r"\?",
+        r"\\",
+        r"\^",
+        r"\|",
+        r"\~",
+        r"\\\\",
     ]
     pattern = "|".join(ntfs_characters + characters)
     regex = re.compile(pattern, re.UNICODE)