python find next occurrence in string code example
Example 1: python replace first occurrence in string
# string replace() function perfectly solves this problem:
# string.replace(s, old, new[, maxreplace])
# Return a copy of string s with all occurrences of substring old replaced
# by new. If the optional argument maxreplace is given, the first maxreplace
# occurrences are replaced.
>>> u'longlongTESTstringTEST'.replace('TEST', '?', 1)
u'longlong?stringTEST'
Example 2: how to find the last occurrence of a character in a string in python
original_string = "sentence one. sentence two. sentence three"
last_char_index = original_string.rfind(".")
new_string = original_string[:last_char_index] + "," + original_string
print(new_string)
"sentence one. sententce two, sentence three"