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Python dict() function with Examples

Python dict() function with Examples on append(), clear(), extend(), insert(), pop(), remove(), index(), count(), pop(), reverse(), sort(), copy(), all(), bool(), enumerate(), iter(), map(), min(), max(), sum() etc.

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Python dict() Function

Python dict() function is a constructor which creates a dictionary. Python dictionary provides three different constructors to a create dictionary.

  • If no argument is passed, it creates an empty dictionary.
  • If a positional argument is given, a dictionary is created with the same key-value pairs. Otherwise, pass an iterable object.
  • If keyword arguments are given, the keyword arguments and their values are added to the dictionary created from the positional argument.

Signature

dict ([**kwargs])
dict ([mapping, **kwargs])
dict ([iterable, **kwargs])

Parameters

kwargs: It is a keyword argument.

mapping: It is another dictionary.

iterable: It is an iterable object in the form of a key-value pair(s).

Return

It returns a dictionary.

Let's see some examples of dict() function to understand it's functionality.

Python dict() Function Example 1

A simple example to create an empty or non-empty dictionary. Arguments of the dictionary are optional.

# Python dict() function example
# Calling function
result = dict() # returns an empty dictionary
result2 = dict(a=1,b=2)
# Displaying result
print(result)
print(result2)

Output:

{}
{'a': 1, 'b': 2}

Python dict() Function Example 2

# Python dict() function example
# Calling function
result = dict({'x': 5, 'y': 10}, z=20) # Creating dictionary using mapping
result2 = dict({'x': 5, 'y': 10, 'z':20})
# Displaying result
print(result)
print(result2)

Output:

{'x': 5, 'z': 20, 'y': 10}
{'x': 5, 'z': 20, 'y': 10}

Python dict() Function Example 3

# Python dict() function example
# Calling function
result = dict([(1, 'One'), [2, 'Two'], [3,'Three']]) # Creating using iterable
result2 = dict([['x','X'],('y','Y')])
# Displaying result
print(result)
print(result2)

Output:

{1: 'One', 2: 'Two', 3: 'Three'}
{'y': 'Y', 'x': 'X'}

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