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Using dictionaries in python code#

A Python list is an ordered sequence of objects, whereas dictionaries are unordered. A dictionary is mutable: its value canīe changed internally. Python lists and dictionaries are two data structures in Python used to store data. Exercise 6: Delete a list of keys from a. Exercise 5: Create a dictionary by extracting the keys from a given dictionary. Exercise 4: Initialize dictionary with default values.

Exercise 3: Print the value of key ‘history’ from the below dict. Exercise 2: Merge two Python dictionaries into one. This means that a value of the key’s typeĬannot be changed internally after it is initially created. Exercise 1: Convert two lists into a dictionary. The only restriction on the key is that itīe an immutable type. The more general Python terminology for wordĪnd definition are key and value. They can associate many types of objects with They do not have to associate words and their Python dictionaries are actually more general than the common use ' ) print ( 'Spanish colors: ' + dictionary + ', ' + dictionary + ', ' + dictionary + '. Program spanish2a.py is the same as above except it has theĭef main (): dictionary = createDictionary () print ( 'Count in Spanish: ' + dictionary + ', ' + dictionary + ', ' + dictionary + '. We could also use the dictionary more extensively. The name does not have to match the name used inĬreateDictionary.

To remember the dictionary returned to main, it needs a.

Variable name in the function, spanish, is lost when the

The dictionary that is created is returned, but the local.

String immediately after the definition heading.

First, like whole files, functions can have a documentation.

Using dictionaries in python code#

This code illustrates several things about functions. """ def createDictionary (): '''Returns a tiny Spanish dictionary''' spanish = dict () spanish = 'hola' spanish = 'si' spanish = 'uno' spanish = 'dos' spanish = 'tres' spanish = 'rojo' spanish = 'negro' spanish = 'verde' spanish = 'azul' return spanish def main (): dictionary = createDictionary () print ( dictionary ) print ( dictionary ) main () """A tiny English to Spanish dictionary is created, using the Python dictionary type dict.