Questions about the backslash "\" in python regularization

import re
print(re.findall("I\\b","hellow I am LIST"))-sharp ["I"]
print(re.findall("\\\\l","abca\lsd"))-sharp ["\\l"]

Why does the first match \ b only need 2 \ , while the second match \ l needs 4?


in the string, \ is the character after the escape. If you have \ this in your string, you need \ to escape

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1be5b77-31788.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1be5b77-31788.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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