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v0.8.1
v0.8.1
https://github.com/python/cpython
Tip revision: 74f4bd53e03ded8408bcc2de67cf0f5a4ac5b1a1 authored by Barry Warsaw on 23 February 2012, 15:59:38 UTC
Bump some more copyright years (as per PEP 101), since this is the first
Bump some more copyright years (as per PEP 101), since this is the first
Tip revision: 74f4bd5
rot_13.py
#!/usr/bin/env python
""" Python Character Mapping Codec for ROT13.
See http://ucsub.colorado.edu/~kominek/rot13/ for details.
Written by Marc-Andre Lemburg (mal@lemburg.com).
"""#"
import codecs
### Codec APIs
class Codec(codecs.Codec):
def encode(self,input,errors='strict'):
return codecs.charmap_encode(input,errors,encoding_map)
def decode(self,input,errors='strict'):
return codecs.charmap_decode(input,errors,decoding_map)
class IncrementalEncoder(codecs.IncrementalEncoder):
def encode(self, input, final=False):
return codecs.charmap_encode(input,self.errors,encoding_map)[0]
class IncrementalDecoder(codecs.IncrementalDecoder):
def decode(self, input, final=False):
return codecs.charmap_decode(input,self.errors,decoding_map)[0]
class StreamWriter(Codec,codecs.StreamWriter):
pass
class StreamReader(Codec,codecs.StreamReader):
pass
### encodings module API
def getregentry():
return codecs.CodecInfo(
name='rot-13',
encode=Codec().encode,
decode=Codec().decode,
incrementalencoder=IncrementalEncoder,
incrementaldecoder=IncrementalDecoder,
streamwriter=StreamWriter,
streamreader=StreamReader,
)
### Decoding Map
decoding_map = codecs.make_identity_dict(range(256))
decoding_map.update({
0x0041: 0x004e,
0x0042: 0x004f,
0x0043: 0x0050,
0x0044: 0x0051,
0x0045: 0x0052,
0x0046: 0x0053,
0x0047: 0x0054,
0x0048: 0x0055,
0x0049: 0x0056,
0x004a: 0x0057,
0x004b: 0x0058,
0x004c: 0x0059,
0x004d: 0x005a,
0x004e: 0x0041,
0x004f: 0x0042,
0x0050: 0x0043,
0x0051: 0x0044,
0x0052: 0x0045,
0x0053: 0x0046,
0x0054: 0x0047,
0x0055: 0x0048,
0x0056: 0x0049,
0x0057: 0x004a,
0x0058: 0x004b,
0x0059: 0x004c,
0x005a: 0x004d,
0x0061: 0x006e,
0x0062: 0x006f,
0x0063: 0x0070,
0x0064: 0x0071,
0x0065: 0x0072,
0x0066: 0x0073,
0x0067: 0x0074,
0x0068: 0x0075,
0x0069: 0x0076,
0x006a: 0x0077,
0x006b: 0x0078,
0x006c: 0x0079,
0x006d: 0x007a,
0x006e: 0x0061,
0x006f: 0x0062,
0x0070: 0x0063,
0x0071: 0x0064,
0x0072: 0x0065,
0x0073: 0x0066,
0x0074: 0x0067,
0x0075: 0x0068,
0x0076: 0x0069,
0x0077: 0x006a,
0x0078: 0x006b,
0x0079: 0x006c,
0x007a: 0x006d,
})
### Encoding Map
encoding_map = codecs.make_encoding_map(decoding_map)
### Filter API
def rot13(infile, outfile):
outfile.write(infile.read().encode('rot-13'))
if __name__ == '__main__':
import sys
rot13(sys.stdin, sys.stdout)