Karthikeyan Singaravelan <tir.kar...@gmail.com> added the comment:
https://docs.python.org/3/howto/regex.html#more-metacharacters $ Matches at the end of a line, which is defined as either the end of the string, or any location followed by a newline character. \Z Matches only at the end of the string. >>> eth_re = re.compile(r'^0x[0-9a-fA-F]{40}\Z') >>> print(eth_re.match(a)) None >>> eth_re = re.compile(r'^0x[0-9a-fA-F]{40}$') >>> print(eth_re.match(a)) <re.Match object; span=(0, 42), match='0xd26935a5ee4cd542e8a3a7e74fb7a99855975b59'> You can also use re.DEBUG to see the difference >>> re.match(r'^0x[0-9a-fA-F]{40}$', a, re.DEBUG) AT AT_BEGINNING LITERAL 48 LITERAL 120 MAX_REPEAT 40 40 IN RANGE (48, 57) RANGE (97, 102) RANGE (65, 70) AT AT_END 0. INFO 4 0b0 42 42 (to 5) 5: AT BEGINNING 7. LITERAL 0x30 ('0') 9. LITERAL 0x78 ('x') 11. REPEAT_ONE 16 40 40 (to 28) 15. IN 11 (to 27) 17. CHARSET [0x00000000, 0x03ff0000, 0x0000007e, 0x0000007e, 0x00000000, 0x00000000, 0x00000000, 0x00000000] 26. FAILURE 27: SUCCESS 28: AT END 30. SUCCESS <re.Match object; span=(0, 42), match='0xd26935a5ee4cd542e8a3a7e74fb7a99855975b59'> >>> re.match(r'^0x[0-9a-fA-F]{40}\Z', a, re.DEBUG) AT AT_BEGINNING LITERAL 48 LITERAL 120 MAX_REPEAT 40 40 IN RANGE (48, 57) RANGE (97, 102) RANGE (65, 70) AT AT_END_STRING 0. INFO 4 0b0 42 42 (to 5) 5: AT BEGINNING 7. LITERAL 0x30 ('0') 9. LITERAL 0x78 ('x') 11. REPEAT_ONE 16 40 40 (to 28) 15. IN 11 (to 27) 17. CHARSET [0x00000000, 0x03ff0000, 0x0000007e, 0x0000007e, 0x00000000, 0x00000000, 0x00000000, 0x00000000] 26. FAILURE 27: SUCCESS 28: AT END_STRING 30. SUCCESS ---------- nosy: +xtreak _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue42550> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
