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+--- Thread: Why the this extend example is printing 2 two times? (/thread-23674.html)
Why the this extend example is printing 2 two times? - sbabu - Jan-12-2020
Why the this extend example is printing 2 two times?
def my_fun(x):
for k in range (len(x)):
print('k is ',k)
x.extend(x[:k])
print('x is',x)
m = [2,4,3]
my_fun(m)
print(m)Out Put k is 0
x is [2, 4, 3] 0th element is 2 but it does not insert that here.
k is 1
x is [2, 4, 3, 2]
k is 2
x is [2, 4, 3, 2, 2, 4] After 3 why 2 is being inserted two times
[2, 4, 3, 2, 2, 4]
RE: Why the this extend example is printing 2 two times? - Gribouillis - Jan-12-2020
The list
x is extended by its ks first elements for k in 1, 2, 3, …. Thus x is extended by [], then by [2], then by [2, 4]. That's why 2 is appended twice.