32. Scan.find(): Search for a constant
string
logscan.py
# - - - S c a n . f i n d
def find ( self, s ):
'''Does string s occur at or after the current position?
'''
We use the standard str.find method to do the
searching. This method returns -1 if the string is not found.
logscan.py
#-- 1 --
# [ if s is found at or after self.line[self.pos:] ->
# result := position of the first match relative
# to self.line
# else ->
# result := -1 ]
result = self.line.find ( s, self.pos )
#-- 2 --
if result < 0:
return None
else:
return result
