Push an element at the head of the list only if the list exists.
# Initialize the list redis.lpush("mylist", "one") assert redis.lpushx("mylist", "two", "three") == 3 assert lrange("mylist", 0, -1) == ["three", "two", "one"] # Non existing key assert redis.lpushx("non-existent-list", "one") == 0
The key of the list.
One or more elements to push at the head of the list.
The length of the list after the push operation.
0 if the list did not exist and thus no element was pushed.
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