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Python MCQ Questions and answers,
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Python mutable objects,
list, mutable list, list is mutable,
reverse, print,
lst.reverse(), reverse the list in-place,
Reverses items of the list in-place since list is mutable and returns None.
Function arguments in Python are evaluated from left to right before the function call.
Ex: print()

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Mutable, Assigned copy share same reference of it's original.
Any change in original,
Mutable→change in-place

lst.reverse()
Reverses items of the list in-place since list is mutable and returns None.
Function arguments in Python are evaluated from left to right before the function call.
Ex: print()

list x created as ['a',5]
print fn
1)x evaluated,x→['a', 5]
2)x.reverse() evaluated, modifies x in-place,
⇒x=[5, 'a'] (reversed),returns None
3)prints [5, 'a'] since x already changed, None

print evaluates arguments as: first x, second x.reverse() which reverses x in-place because of list's mutability so x value is reversed and then prints x which has reversed value and None returned by x.reverse().

⇒x printed is reversed order since reverse() happened during argument evaluation, before actual printing.
⇒Fact that list.reverse() changes the list in-place is due to list's mutable nature.


List:
Sequences(Compound data type), collection of ordered items separated by ',' within [ ].