Update codecs from v3.14.2

Lib/codecs.py

@@ -884,7 +884,6 @@ class StreamRecoder:
 ### Shortcuts
 
 def open(filename, mode='r', encoding=None, errors='strict', buffering=-1):
-
     """ Open an encoded file using the given mode and return
         a wrapped version providing transparent encoding/decoding.
 
@@ -912,8 +911,11 @@ def open(filename, mode='r', encoding=None, errors='strict', buffering=-1):
         .encoding which allows querying the used encoding. This
         attribute is only available if an encoding was specified as
         parameter.
-
     """
+    import warnings
+    warnings.warn("codecs.open() is deprecated. Use open() instead.",
+                  DeprecationWarning, stacklevel=2)
+
     if encoding is not None and \
        'b' not in mode:
         # Force opening of the file in binary mode
@@ -1109,24 +1111,15 @@ def make_encoding_map(decoding_map):
 
 ### error handlers
 
-try:
-    strict_errors = lookup_error("strict")
-    ignore_errors = lookup_error("ignore")
-    replace_errors = lookup_error("replace")
-    xmlcharrefreplace_errors = lookup_error("xmlcharrefreplace")
-    backslashreplace_errors = lookup_error("backslashreplace")
-    namereplace_errors = lookup_error("namereplace")
-except LookupError:
-    # In --disable-unicode builds, these error handler are missing
-    strict_errors = None
-    ignore_errors = None
-    replace_errors = None
-    xmlcharrefreplace_errors = None
-    backslashreplace_errors = None
-    namereplace_errors = None
+strict_errors = lookup_error("strict")
+ignore_errors = lookup_error("ignore")
+replace_errors = lookup_error("replace")
+xmlcharrefreplace_errors = lookup_error("xmlcharrefreplace")
+backslashreplace_errors = lookup_error("backslashreplace")
+namereplace_errors = lookup_error("namereplace")
 
 # Tell modulefinder that using codecs probably needs the encodings
 # package
 _false = 0
 if _false:
-    import encodings
+    import encodings  # noqa: F401