The definition states the first argument is the substring then followed by two optional arguments, start index and end index. Here is an example of my issue…
spam = ‘0100’
print(spam.find(‘1’,0,1))
This results in -1 or that the it cannot find ‘1’ within the indices 0 and 1, but the character 1 is in that range at position 1. What am I missing?
Ranges and slices in Python are always open on the right hand side:
>>> spam = '0100'
>>> spam[0:1]
'0'
find conforms to this, so in your code spam[1] is not part of the searched substring. See Built-in Types — Python 3.9.2 documentation which states for find: “Return the lowest index in the string where substring sub is found within the slice s[start:end] .”
Thank you for clarifying. This was helpful.