I am using Python version 3.6.0 and am learning Python as my very first programming language.
Right now I am studying Regular Expressions. We are finding all of the matched substrings in a string using the "findall" method with the following syntax: re.findall(pattern, string[, flags]) Here is a link to the page tutorial I am using: http://www.python-course.eu/python3_re_advanced.php So far have understood everything except for the following example: >>> t = "A fat cat doesn't eat oat but a rat eats bats." >>> mo = re.findall("[force]at", t) >>> print(mo) ['fat', 'cat', 'eat', 'oat', 'rat', 'eat'] What I don't understand is the [force] part of the Regular Expression. I cannot find anywhere online where there is an explanation of what [force] means or what is does. Why does it match to 'eat' from 'eats'? But not 'bat' from 'bats'? I would prefer to use the following RE as it achieves my desired result: >>> mo = re.findall("[A-Za-z]at", t) >>> print(mo) ['fat', 'cat', 'eat', 'oat', 'rat', 'eat', 'bat'] Can anyone tell me what the [force] means and why it was used? Thanks! Kelly _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
