[Tutor] unable to use find(), index()

[surya k]

I am using the following code 
astr = "foobar"str1 ="foo"astr.find(str1, beg=0, end=3)

This is showing the following error
Traceback (most recent call last):  File "<interactive input>", line 1, in <module>TypeError: find() takes no keyword arguments
I even tried by importing "string" module, but it isn't working.
This same problem with find()
Could you please help me!