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Remove usage of re module from encodings package search function.

This commit is contained in:
Marc-André Lemburg 2003-05-16 17:07:51 +00:00
parent 813cec9a62
commit 2820125935
1 changed files with 19 additions and 4 deletions
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23
Lib/encodings/__init__.py
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@ -27,12 +27,17 @@
"""#"
import codecs, exceptions, re
import codecs, exceptions, types
_cache = {}
_unknown = '--unknown--'
_import_tail = ['*']
_norm_encoding_RE = re.compile('[^a-zA-Z0-9.]')
_norm_encoding_map = (' . '
'0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ '
' abcdefghijklmnopqrstuvwxyz '
' '
' '
' ')
class CodecRegistryError(exceptions.LookupError,
exceptions.SystemError):
@ -45,10 +50,20 @@ def normalize_encoding(encoding):
Normalization works as follows: all non-alphanumeric
characters except the dot used for Python package names are
collapsed and replaced with a single underscore, e.g. ' -;#'
becomes '_'.
becomes '_'. Leading and trailing underscores are removed.
Note that encoding names should be ASCII only; if they do use
non-ASCII characters, these must be Latin-1 compatible.
"""
return '_'.join(_norm_encoding_RE.split(encoding))
# Make sure we have an 8-bit string, because .translate() works
# differently for Unicode strings.
if type(encoding) is types.UnicodeType:
# Note that .encode('latin-1') does *not* use the codec
# registry, so this call doesn't recurse. (See unicodeobject.c
# PyUnicode_AsEncodedString() for details)
encoding = encoding.encode('latin-1')
return '_'.join(encoding.translate(_norm_encoding_map).split())
def search_function(encoding):