x
txt = "Hello, welcome to my world."print(txt.rfind("q"))print(txt.rindex("q"))
-1
Traceback (most recent call last):
File "demo_ref_string_rfind_vs_rindex.py", line 4 in <module>
print(txt.rindex("q"))
ValueError: substring not found
Traceback (most recent call last):
File "demo_ref_string_rfind_vs_rindex.py", line 4 in <module>
print(txt.rindex("q"))
ValueError: substring not found