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Python Python Collections (2016, retired 2019) Slices Slice Functions

Posted by MIkhail Vinogradov
MIkhail Vinogradov
2,669 Points

hello, why does this function work?

def first_4(iter): iter=iter[:4] return iter

slices.py 
def first_4(iter):
    iter[:4]
    return iter


iter = 'safadsfasdlfkjasdlfkj'

result = first_4(iter)

print (result)

2 Answers

MIkhail Vinogradov
MIkhail Vinogradov
2,669 Points
MIkhail Vinogradov
MIkhail Vinogradov
2,669 Points

thanks!!!

Cooper Runstein
Cooper Runstein
11,850 Points
Cooper Runstein
Cooper Runstein
11,850 Points

I'm going to assume you're asking why it doesn't work. It doesn't work because the second line in our function isn't actually doing anything to change the output of your function. Your function right now is the same as:

def first_4(iter):
    return iter

If you want to actually return the first four characters, you need to do something like:

def first_4(iter):
    iter = iter[:4]
    return iter
#or 
def first_4(iter):
    return iter[:4]