Dictionary- Python- Alpha Codist

Dictionary, What, Create a dictionary, Example, Merge dictionaries, kwargs, multiple dictionaries, with example, coding, make game, pygame, course

 Dictionary

A dictionary is a collection that is unordered, changeable, and indexed. In Python, dictionaries are written with curly brackets{}, and they have keys and values.

Create a dictionary:

In Python, a Dictionary can be created by placing a sequence of elements within the curly brackets, separated by 'comma'. Dictionary holds a pair of values, one being the Key and the other corresponding pair element being its like 'Key: value'.

Example:

alpha = {
    'nadim': 5,
    'niyaz': 9,
    'nila':4
    }

codist = {
    'tim': 8,
    'rahim':4,
    'nadim':9
    }

Take or read data from the dictionary:

Let's print the value of a single key from the dictionary above.

Example:

alpha = {
    'nadim': 5,
    'niyaz': 9,
    'nila':4
    }

codist = {
    'tim': 8,
    'rahim':4,
    'nadim':9
    }

Data = alpha['nadim']

print(Data)

The result of this code is the value of the key nadim which is 5. You can even change the value of a key this way try it.

Merge dictionaries:

In Python, the Dictionary class provides a function update() i.e. 'dictionatyname.update(seconddictionaryname)' It accepts another dictionary or an Iterable object (collection of key-value pairs) as an argument. Then merges the contents of this passed dictionary or Iterable in the current dictionary.

Example:

alpha = {
    'nadim': 5,
    'niyaz': 9,
    'nila':4
    }

codist = {
    'tim': 8,
    'rahim':4,
    'nadim':9
    }

alpha.update(codist)

print(alpha)

Result:

Using **kwargs we can send variable length key-value pairs to a function. When we apply '**' to a dictionary, then it expands the contents in the dictionary as a collection of key-value pairs

as an example, if we have a dictionary:

alpha = {
    'nadim': 5,
    'niyaz': 9,
    'nila':4
    }

codist = {
    'tim': 8,
    'rahim':4,
    'nadim':9
    }

best = {**alpha, **codist}

print(best)

Result:

You can merge multiple dictionaries using kwargs.

Example:

alpha = {
    'nadim': 5,
    'niyaz': 9,
    'nila':4
    }

codist = {
    'tim': 8,
    'rahim':4,
    'nadim':9
    }

best = {
    'jerry':7,
    'bob': 71,
    'rahim':58
        }
site = {**alpha, **codist, **best}

print(site)

Result:

Some of the data were collected. Source: (tutorialspoint.com, onlyscience360.blogspot.com)

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