python backreference regex -


i need search this:

lines = """package p_dio_bfm    procedure setbfmcmd (         variable  pin : in tbfmcmd       ); end p_dio_bfm; -- end package;  package body p_dio_bfm    procedure setbfmcmd (         variable  pin : in tbfmcmd       )    begin       bfm_cmd := pin;    end setbfmcmd; end p_dio_bfm;"""

i need extract package name, i.e. p_dio_bfm , package declaration, i.e. part between "package p_dio_bfm is" , first "end p_dio_bfm;"

the problem package declaration may end "end p_dio_bfm;" or "end package;" tried following "or" regex which: - works packages ending "end package" - not work packages ending "end pck_name;"

pattern = re.compile("package\s+(\w+)\s+is(.*)end\s+(package|\1)\s*;") match = pattern.search(lines)

the problem (package|\1) part of regex, catch either word "package" or matched package name.

update: have provided full code hope clarify it:

import re lines1 = """package p_dio_bfm    procedure setbfmcmd (       variable  pin : in tbfmcmd       ); end p_dio_bfm;  package body p_dio_bfm    procedure setbfmcmd (       variable  pin : in tbfmcmd       )    begin       bfm_cmd := pin;    end setbfmcmd; end p_dio_bfm;"""  lines2 = """package p_dio_bfm    procedure setbfmcmd (       variable  pin : in tbfmcmd       ); end package;  package body p_dio_bfm    procedure setbfmcmd (       variable  pin : in tbfmcmd       )    begin       bfm_cmd := pin;    end setbfmcmd; end package;"""  lines1 = lines1.replace('\n', ' ') print lines1  pattern = re.compile("package\s+(\w+)\s+is(.*)end\s+(package|\1)\s*;") match = pattern.search(lines1)  print match  lines2 = lines2.replace('\n', ' ') print lines2  match = pattern.search(lines2)  print match

i expect in both cases, using unique regex, part:

"""procedure setbfmcmd (           variable  pin : in tbfmcmd           );"""

without \n chars have removed.

how about:

>>> row in re.findall( ...   r'package(?:\s.*?)(?p<needle>[^\s]+)\s+is\s+(.*?)end\s+(?:package|(?p=needle));', ...   lines, ...   re.s ... ): ...   print '{{{', row[1], '}}}' ... {{{ procedure setbfmcmd (       variable  pin : in tbfmcmd       ); }}} {{{ procedure setbfmcmd (       variable  pin : in tbfmcmd       )    begin       bfm_cmd := pin;    end setbfmcmd; }}}

i took liberty not filter how @mihai-hangiu asked including second block.


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