dictionary definition in python

########## Defination; Dict = {"name": 'Izhaan', "salary": 1234, "age": 23} print(Dict) ########### Respective Function; clear() - Removes all the elements from the dictionary copy() - Returns a copy of the dictionary fromkeys() - Returns a dictionary with the specified keys and value get() - Returns the value of the specified key items() - Returns a list containing a tuple for each key value pair keys() - Returns a list containing the dictionary's keys pop() - Removes the element with the specified key popitem() - Removes the last inserted key-value pair setdefault() - Returns the value of the specified key. If the key does not exist: insert the key, with the specified value update() - Updates the dictionary with the specified key-value pairs values() - Returns a list of all the values in the dictionary

dictionary in python

# Dictionaries in Python are used to store set of data like Key: Value pair

# the syntax of a dictionary in Python is very simple we use {} inside that
	# we define {Key: Value}, to separate multiple values we use','
programming_dictionary = {
    "Bug": "An error in a program that prevents the program from running as expected.",
  
    "Function": "A piece of code that you can easily call over and over again.",
  
  	"Loop": "The action of doing sommething again and again",
}
# to retrieve the values from a dictionary we use the Key name as an Index
# retrieving the Function's definition
print(programming_dictionary["Function"])	# this will print the definition of Function

# if you wanna print all the entries in the dictionary you can do that by for loop
for key in programming_dictionary:
  print(programming_dictionary[key])	# prints all entries
  
# adding items to a dictionary
# the following code will add another entry to the dictionary called Variable
programming_dictionary["Variable"] = "The label to store some sort of data"
print(programming_dictionary["Variable"])

# editing the values of a key 
# editing the value of variable
programming_dictionary["Variable"] = "Variables are nothing but reserved memory locations to store values. This means that when you create a variableyou reserve some space in memory"

# if you learnt something from this please upvote it

Posted by: Guest on January-03-2021

tel = {'jack': 4098, 'sape': 4139} tel['guido'] = 4127 print(tel) # OUTPUT {'jack': 4098, 'sape': 4139, 'guido': 4127} print(tel['jack']) # OUTPUT 4098 del tel['sape'] tel['irv'] = 4127 print(tel) # OUTPUT {'jack': 4098, 'guido': 4127, 'irv': 4127} print(list(tel)) # OUTPUT ['jack', 'guido', 'irv'] print(sorted(tel)) # OUTPUT ['guido', 'irv', 'jack'] print('guido' in tel) # OUTPUT True print('jack' not in tel) # OUTPUT False

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