New submission from Snidhi Sofpro <snidhi.sof...@gmail.com>:
---------- Demo case with unexpected results starting from matching block 3 (result of code that follows): sys.version_info(major=3, minor=6, micro=9, releaselevel='final', serial=0) Matches between: <a id="nhix_Rgstr" href="http://local:56067/register/200930162135700";> <a id="nhix_Rgstr" href="http://local:53813/register/20100517282450281";> Match(a=0, b=0, size=39) same-> <a id="nhix_Rgstr" href="http://local:5 same=> <a id="nhix_Rgstr" href="http://local:5 Match(a=43, b=43, size=12) same-> /register/20 same=> /register/20 Match(a=59, b=55, size=1) same-> 1 same=> 0 Match(a=66, b=56, size=2) same-> 00 same=> 93 Match(a=68, b=70, size=2) same-> "> same=> # ---------- code that results in the above: def get_mblk(dpiy_Frst, dpiy_Scnd): import difflib; sqmn_o = difflib.SequenceMatcher(None, dpiy_Frst, dpiy_Scnd); mblk_ls = [ block for block in sqmn_o.get_matching_blocks()]; for mblk in mblk_ls[:-1]: #exclude the last dummy block print(mblk); mtch_a = dpiy_Frst[mblk.a : mblk.a + mblk.size]; mtch_b = dpiy_Frst[mblk.b : mblk.b + mblk.size]; print('same->', mtch_a); print('same=>', mtch_b, '\n'); #endfor #endef get_mblk # --- main -- s1='<a id="nhix_Rgstr" href="http://local:56067/register/200930162135700";>' s2='<a id="nhix_Rgstr" href="http://local:53813/register/20100517282450281";>' import sys; print(sys.version_info, '\n'); print("Matches between:"); print(s1); print(s2); print('\n'); get_mblk(s1, s2); ---------- messages: 378149 nosy: Snidhi priority: normal severity: normal status: open title: difflib SequenceMatcher get_matching_blocks returns non-matching blocks in some cases versions: Python 3.6 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue41964> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
