I am trying to get the index of the first occurrence of a character that occurs in a string after a specified index. For example:
string = 'This + is + a + string'
# The 'i' in 'is' is at the 7th index, find the next occurrence of '+'
string.find_after_index(7, '+')
# Return 10, the index of the next '+' character
>>> 10
Python is so predicable:
>>> string = 'This + is + a + string'
>>> string.find('+',7)
10
Checkout help(str.find):
find(...)
S.find(sub[, start[, end]]) -> int
Return the lowest index in S where substring sub is found,
such that sub is contained within S[start:end]. Optional
arguments start and end are interpreted as in slice notation.
Return -1 on failure.
Also works with str.index except that this will raise ValueError instead of -1 when the substring is not found.
You can use:
start_index = 7
next_index = string.index('+', start_index)
string.find('+', 7)
Read the documentation.