Find All Occurrences of a Substring in a String in Python
import re
# defining string
str1 = "This dress looks good; you have good taste in clothes."
#defining substring
substr = "good"
print("The original string is: " + str1)
print("The substring to find: " + substr)
result = [_.start() for _ in re.finditer(substr, str1)]
print("The start indices of the substrings are : " + str(result))
# Output -
# The original string is: This dress looks good; you have good taste in clothes.
# The substring to find: good
# The start indices of the substrings are : [17, 34]
Here is what the above code is Doing:
1. We have defined a string str1 and a substring substr.
2. We have used the re.finditer() method to find all the indices of the substring in the string.
3. We have used a list comprehension to extract the start indices of the substrings.
4. We have printed the result.
