我正在使用python 2.4,並且遇到了unicode正則表達式的一些問題。我試圖將一個非常清晰和簡明的例子解釋爲我的問題。它看起來好像是Python如何識別不同的字符編碼或者我的理解有問題。非常感謝您參觀!Python Unicode正則表達式
#!/usr/bin/python
#
# This is a simple python program designed to show my problems with regular expressions and character encoding in python
# Written by Brian J. Stinar
# Thanks for the help!
import urllib # To get files off the Internet
import chardet # To identify charactor encodings
import re # Python Regular Expressions
#import ponyguruma # Python Onyguruma Regular Expressions - this can be uncommented if you feel like messing with it, but I have the same issue no matter which RE's I'm using
rawdata = urllib.urlopen('http://www.cs.unm.edu/~brian.stinar/legal.html').read()
print (chardet.detect(rawdata))
#print (rawdata)
ISO_8859_2_encoded = rawdata.decode('ISO-8859-2') # Let's grab this as text
UTF_8_encoded = ISO_8859_2_encoded.encode('utf-8') # and encode the text as UTF-8
print(chardet.detect(UTF_8_encoded)) # Looks good
# This totally doesn't work, even though you can see UNSUBSCRIBE in the HTML
# Eventually, I want to recognize the entire physical address and UNSUBSCRIBE above it
re_UNSUB_amsterdam = re.compile(".*UNSUBSCRIBE.*", re.UNICODE)
print (str(re_UNSUB_amsterdam.match(UTF_8_encoded)) + "\t\t\t\t\t--- RE for UNSUBSCRIBE on UTF-8")
print (str(re_UNSUB_amsterdam.match(rawdata)) + "\t\t\t\t\t--- RE for UNSUBSCRIBE on raw data")
re_amsterdam = re.compile(".*Adobe.*", re.UNICODE)
print (str(re_amsterdam.match(rawdata)) + "\t--- RE for 'Adobe' on raw data") # However, this work?!?
print (str(re_amsterdam.match(UTF_8_encoded)) + "\t--- RE for 'Adobe' on UTF-8")
'''
# In additon, I tried this regular expression library much to the same unsatisfactory result
new_re = ponyguruma.Regexp(".*UNSUBSCRIBE.*")
if new_re.match(UTF_8_encoded) != None:
print("Ponyguruma RE matched! \t\t\t--- RE for UNSUBSCRIBE on UTF-8")
else:
print("Ponyguruma RE did not match\t\t--- RE for UNSUBSCRIBE on UTF-8")
if new_re.match(rawdata) != None:
print("Ponyguruma RE matched! \t\t\t--- RE for UNSUBSCRIBE on raw data")
else:
print("Ponyguruma RE did not match\t\t--- RE for UNSUBSCRIBE on raw data")
new_re = ponyguruma.Regexp(".*Adobe.*")
if new_re.match(UTF_8_encoded) != None:
print("Ponyguruma RE matched! \t\t\t--- RE for Adobe on UTF-8")
else:
print("Ponyguruma RE did not match\t\t\t--- RE for Adobe on UTF-8")
new_re = ponyguruma.Regexp(".*Adobe.*")
if new_re.match(rawdata) != None:
print("Ponyguruma RE matched! \t\t\t--- RE for Adobe on raw data")
else:
print("Ponyguruma RE did not match\t\t\t--- RE for Adobe on raw data")
'''
我正在開發一個替代項目,並且在使用非ASCII編碼文件時遇到困難。這個問題是一個更大的項目的一部分 - 最終我想用其他文本替換文本(我用ASCII工作,但我無法確定其他編碼中的出現)。再次感謝。
http://brian-stinar.blogspot.com
布賴恩J. Stinar-
東西完全是從你的描述缺少的是在你的代碼失敗的方式。你在你的代碼中編寫*「#這完全不起作用」*,但是你沒有提示它如何不起作用。打印的字符串是否爲空?你會得到錯誤消息/堆棧跟蹤? – ThomasH 2009-07-23 12:15:31