yield from
yield from delegates to a sub-generator, forwarding all values. It simplifies generator chaining and is required for proper coroutine delegation.
Python
Intermediate
4 min read
yield from
Example
def flatten(nested):
for item in nested:
if isinstance(item, list):
yield from flatten(item)
else:
yield item
print(list(flatten([1, [2, [3, 4]], 5])))
# [1, 2, 3, 4, 5] Pro Tip
yield from also forwards send() and throw() calls to the sub-generator.