Python - Key Value list pairings in Dictionary

Python - Key Value list pairings in Dictionary

To create a dictionary in Python where you have a list of keys and a list of values, and you want to pair each key with its corresponding value, you can use the zip function. The zip function pairs items from two or more iterables.

Here's how you can use it:

Example:

Let's say you have the following lists of keys and values:

keys = ['a', 'b', 'c']
values = [1, 2, 3]

To create a dictionary from these lists:

my_dict = dict(zip(keys, values))
print(my_dict)  # Output: {'a': 1, 'b': 2, 'c': 3}

The zip function returns an iterator of tuples, where the i-th tuple contains the i-th element from each of the argument sequences or iterables. The dict constructor then takes these pairs and turns them into key-value pairs in a new dictionary.

Additional Note:

If the lists of keys and values have different lengths, zip will stop creating pairs when the shorter list ends. For example:

keys = ['a', 'b']
values = [1, 2, 3]
my_dict = dict(zip(keys, values))
print(my_dict)  # Output: {'a': 1, 'b': 2}

In this case, the value 3 does not get included in the dictionary since there's no corresponding key in the keys list.

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