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Tuples A Tuple represents a collection of objects that are ordered and immutable (cannot be modified). Tuples allow duplicate members and are indexed.
The Key value of a Dictionary is unique and doesn't let you add a duplicate key entry.
When it is required to add a dictionary to a tuple, the 'list' method, the 'append', and the 'tuple' method can be used. A list can be used to store heterogeneous values (i.e data of any data type like integer, floating point, strings, and so on). The 'append' method adds elements to the end of the list.
Just call dict() on the list of tuples directly
>>> my_list = [('a', 1), ('b', 2)]
>>> dict(my_list)
{'a': 1, 'b': 2}
The dict constructor accepts input exactly as you have it (key/value tuples).
>>> l = [('a',1),('b',2)]
>>> d = dict(l)
>>> d
{'a': 1, 'b': 2}
From the documentation:
For example, these all return a dictionary equal to {"one": 1, "two": 2}:
dict(one=1, two=2) dict({'one': 1, 'two': 2}) dict(zip(('one', 'two'), (1, 2))) dict([['two', 2], ['one', 1]])
With dict comprehension:
h = {k:v for k,v in l}
It seems everyone here assumes the list of tuples have one to one mapping between key and values (e.g. it does not have duplicated keys for the dictionary). As this is the first question coming up searching on this topic, I post an answer for a more general case where we have to deal with duplicates:
mylist = [(a,1),(a,2),(b,3)]
result = {}
for i in mylist:
result.setdefault(i[0],[]).append(i[1])
print(result)
>>> result = {a:[1,2], b:[3]}
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