CODEWITHSUNDEEP
pythonlisttuples
vincentChen
vincentChen

Reputation: 37

Python - converting List to Tuple and compare(for loop)

def run(lst, tup):
    tup_1 = ()
    for x in range(len(lst)):
        tup_1[x] = lst[x]

    if tup_1[1] == lst[1]:
        return True
        for y in range(len(tup_1)):
            if tup_1[y] == tup[y]:
                return "matched"
            else:
                return "not equal"
print run([1,2,3],(1,2,3))

I tried to convert number in List to Tuple form, so I can compare with another tuple. But the problem is it returns an error like this:

Traceback (most recent call last): File "", line 16, in File "", line 5, in run TypeError: 'tuple' object does not support item assignment

Upvotes: 1

Views: 4275

Answers (2)

Deelaka
Deelaka

Reputation: 13723

This occurs because tuples are immutable, data inside them cannot be mutated

example:

>>> t = (1,2,3)
>>> t[1] = 4
Traceback (most recent call last):
  File "<interactive input>", line 1, in <module>
TypeError: 'tuple' object does not support item assignment

Unlike lists which are mutable:

>>> l = [1,2,3]
>>> l[1] = 4
>>> l
[1, 4, 3]

So use a list instead of a tuple:

tup_1 = []

If you need to convert a list to a tuple you can use the built-in tuple() function

For more information I recommend you read the documentation

Upvotes: 1

thefourtheye
thefourtheye

Reputation: 239573

You can convert a list to tuple with tuple function like this

tuple(lst)

And to check if a list and tuple are the same, you can simply do this

return tuple(lst) == tup

Upvotes: 1

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