What type of data is: a=[(1,1),(2,4),(3,9)]?
a) Array of tuples
b) List of tuples
c) Tuples of lists
d) Invalid type
Answer: b
Explanation: The variable a has tuples enclosed in a list making it a list of tuples.
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>>> import collections
>>> a=collections.namedtuple(‘a’,[‘i’,’j’])
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>>> a,b=b,a
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