Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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Using Python PLY implement the RE to DFA conversion
RENode.py, RELexer.py, REParser.py, RE.py
Transcribed Image Text:REGEX: (a+b) * aa (a+b)*;
start_state({1, 2, 3}).
delta({1, 2, 3},a,{1, 2, 3, 4}).
delta({1, 2, 3},b,{1, 2, 3}).
delta({1, 2, з, 4),а, {1, 2, 3, 4, 5, 6, 7}).
delta({1, 2, 3, 4},b,{1, 2, 3}).
delta({1, 2, 3, 4, 5, 6, 7},a,{1, 2, 3, 4, 5, 6, 7}).
delta({1, 2, з, 4, 5, 6, 7},b,{1, 2, 3, 5, 6, 7}).
delta({1, 2, з, 5, 6, 7},а, (1, 2, 3, 4, 5, 6, 7}).
delta({1, 2, 3, 5, 6, 7},ь, (1, 2, 3, 5, 6, 7}).
delta(set(), a,set()).
delta(set(),b, set()).
final_state({1, 2, 3, 4, 5, 6, 7}).
final_state({1, 2, 3, 5, 6, 7}).
INPUT STRING: abab;
NO MATCH
INPUT STRING: abaabb;
МАТCH
INPUT STRING: exit;
REGEX: (1+2+3+4+5+6+7+8+9) (0+1+2+3+4+5+6+7+8+9) *;
INPUT STRING: 976;
MATCH
INPUT STRING: 0976;
NO MATCH
INPUT STRING: 123450;
MATCH
INPUT STRING: ab12;
Invalid input string
INPUT STRING: exit;
REGEX: exit;
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