正则表达式导致我似乎无法找到的错误

时间:2011-04-27 13:57:00

标签: python regex search

下面的代码工作正常,直到我添加正则表达式行。当我发表评论时,代码再次起作用......我很难过。我只使用正则表达式同时搜索文件中的三种不同类型的字符串(ascii,hex,string)。感谢任何帮助,谢谢!

 elif searchType =='2':
          print "  Directory to be searched: c:\Python27 "
          directory = os.path.join("c:\\","Python27")
          userstring = raw_input("Enter a string name to search: ")
          userStrHEX = userstring.encode('hex')
          userStrASCII = ' '.join(str(ord(char)) for char in userstring)
          regex = re.compile( "(%s|%s|%s)" % ( re.escape( userstring ), re.escape( userStrHEX ), re.escape( userStrASCII ) )
          for root,dirname, files in os.walk(directory):
             for file in files:
                 if file.endswith(".log") or file.endswith(".txt"):
                    f=open(os.path.join(root, file))
                    for line in f.readlines():
                       #if userstring in line:
                       if regex.search(line):       
                          print "file: " + os.path.join(root,file)           
                          break
                    else:
                       print "String NOT Found!"
                       break
                    f.close()

1 个答案:

答案 0 :(得分:4)

当我运行此代码时,出现了类似

的错误
File "search.py", line 7
    for root,dirname, files in os.walk(directory):
      ^
SyntaxError: invalid syntax

这是因为前一行包含已编译的正则表达式,缺少右括号:

regex = re.compile( "(%s|%s|%s)" % ( re.escape( userstring ), re.escape( userStrHEX ), re.escape( userStrASCII ) )

应该阅读

regex = re.compile( "(%s|%s|%s)" % ( re.escape( userstring ), re.escape( userStrHEX ), re.escape( userStrASCII ) ) )