Problem : Generator
dieter at handshake.de
Fri Feb 15 02:02:01 EST 2019
Prahallad Achar <acharbly at gmail.com> writes:
> How to implement reverse generator
A generator generates a sequence of values.
The notion "reverse generator" suggests that you have a sequence
of values and want to produce it in reverse order.
This is not always possible.
i = 0
while True: yield i; i += 1
This generator generates all natural numbers (up to the memory limit).
However, there is no "reverse generator" for the sequence of natural
If you have a finate sequence of values, you can turn it into
a list, reverse this list and iterate over it. This will give
you a reverse generator for your sequence of values (though maybe
an inefficient one).
More information about the Python-list