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str.find(str, beg=0, end=len(string))

#!/usr/bin/python3

str1 = "tutorialpro example....wow!!!"
str2 = "exam";

print (str1.find(str2))
print (str1.find(str2, 5))
print (str1.find(str2, 10))

7
7
-1

>>> info = 'abca'
>>> print(info.find('a'))      # Starting from index 0, find the first occurrence of the substring, returns: 0
0
>>> print(info.find('a', 1))   # Starting from index 1, find the first occurrence of the substring, returns: 3
3
>>> print(info.find('3'))      # Returns -1 if not found
-1
>>>