lex_re3.py (4479:61d3ed46e373) lex_re3.py (6498:e21e9ab5fad0)
1# lex_token.py
1# lex_re3.py
2#
3# Regular expression rule matches empty string
4
5import sys
2#
3# Regular expression rule matches empty string
4
5import sys
6sys.path.insert(0,"..")
6if ".." not in sys.path: sys.path.insert(0,"..")
7
8import ply.lex as lex
9
10tokens = [
11 "PLUS",
12 "MINUS",
13 "NUMBER",
14 "POUND",
15 ]
16
17t_PLUS = r'\+'
18t_MINUS = r'-'
19t_NUMBER = r'(\d+)'
20t_POUND = r'#'
21
22def t_error(t):
23 pass
24
7
8import ply.lex as lex
9
10tokens = [
11 "PLUS",
12 "MINUS",
13 "NUMBER",
14 "POUND",
15 ]
16
17t_PLUS = r'\+'
18t_MINUS = r'-'
19t_NUMBER = r'(\d+)'
20t_POUND = r'#'
21
22def t_error(t):
23 pass
24
25import sys
26
25
26
27lex.lex()
28
29
27lex.lex()
28
29