python find all indexes of character in string code example
Example 1: python3 return a list of indexes of a specific character in a string
string='mississippi'
s='s'
lst= []
for i in range(len(string)):
if (string[i] == s):
lst.append(i)
print(lst)
Example 2: python find all elements of substring in string
def find_all(a_str, sub):
start = 0
while True:
start = a_str.find(sub, start)
if start == -1: return
yield start
start += len(sub)
list(find_all('spam spam spam spam', 'spam'))
Example 3: how to find the indexes of a substring in a string in python
import re
matches_start = re.finditer(word.lower(), string.lower())
matches_position_start = [match.start() for match in matches_start]
matches_end = re.finditer(word.lower(), string.lower())
matches_position_end = [match.end() for match in matches_end]