Reference no: EM133185395

Question: Watch the following regex video and complete the program below by specifying the regular expression on line #48 in order to define strings over {a,b,c} that start and end with the same symbol.

Note that some exemplary members and nonmembers are given as multiline strings.

Also note that line #44 denotes the empty string

Step-2: In your video tutorial, change the regular expression as you like and provide at least 5 members and 5 nonmembers and show that it works as desired

import re

members = '''aaabbca
aba
ccc
cbc
a
b
c'''

nonmembers = '''abc
ac

cccbbbbbba
aaaab'''

pattern = re.compile(r'^(a((a|b|c)*a)?|b((a|b|c)*b)?|c((a|b|c)*c)?)

, re.MULTILINE)

let us check if only the member strings are matched with the expression matches = set([x.group(0) for x in pattern.finditer(members+'\n'+nonmembers)]) print(matches == set(members.split('\n')))

Attachment:- regular expression.rar