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17 statements  

1"""Regexps to match html elements""" 

2 

3import re 

4 

5attr_name = "[a-zA-Z_:][a-zA-Z0-9:._-]*" 

6 

7unquoted = "[^\"'=<>`\\x00-\\x20]+" 

8single_quoted = "'[^']*'" 

9double_quoted = '"[^"]*"' 

10 

11attr_value = "(?:" + unquoted + "|" + single_quoted + "|" + double_quoted + ")" 

12 

13attribute = "(?:\\s+" + attr_name + "(?:\\s*=\\s*" + attr_value + ")?)" 

14 

15open_tag = "<[A-Za-z][A-Za-z0-9\\-]*" + attribute + "*\\s*\\/?>" 

16 

17close_tag = "<\\/[A-Za-z][A-Za-z0-9\\-]*\\s*>" 

18comment = "<!---?>|<!--(?:[^-]|-[^-]|--[^>])*-->" 

19processing = "<[?][\\s\\S]*?[?]>" 

20declaration = "<![A-Za-z][^>]*>" 

21cdata = "<!\\[CDATA\\[[\\s\\S]*?\\]\\]>" 

22 

23HTML_TAG_RE = re.compile( 

24 "^(?:" 

25 + open_tag 

26 + "|" 

27 + close_tag 

28 + "|" 

29 + comment 

30 + "|" 

31 + processing 

32 + "|" 

33 + declaration 

34 + "|" 

35 + cdata 

36 + ")" 

37) 

38HTML_OPEN_CLOSE_TAG_STR = "^(?:" + open_tag + "|" + close_tag + ")" 

39HTML_OPEN_CLOSE_TAG_RE = re.compile(HTML_OPEN_CLOSE_TAG_STR)