Free Programming Source Codes and Computer Programming Tutorials: April 2020

Wednesday, April 29, 2020

Remove a key from a Dictionary in Python

Write a Python program to remove a key from a dictionary.

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My email address is the following jakerpomperada@gmail.com, jakerpomperada@aol.com, and jakerpomperada@yahoo.com.

My mobile number here in the Philippines is 09173084360.

My telephone number at home here in Bacolod City, Negros Occidental Philippines is +63 (034) 4335675.

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My personal website is http://www.jakerpomperada.com

My programming website is http://www.jakerpomperada.blogspot.com

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Program Listing

print()

print("\tRemove a key from a dictionary");

print()

myDictionary = {'a':1,'b':2,'c':3,'d':4}

print("\t",myDictionary)

if 'a' in myDictionary:

del myDictionary['a']

print("\t",myDictionary)

print()

print("\tEnd of Program")

Multiply all the items in a dictionary in Python

Write a Python program to multiply all the items in a dictionary.

my_dictionary = {'data1':100,'data2':-54,'data3':247}

result=1

for key in my_dictionary:

result=result * my_dictionary[key]

print(result)

MERGE TWO PYTHON DICTIONARIES

Write a Python program to merge two Python dictionaries and display the results on the screen.

My email address is the following jakerpomperada@gmail.com, jakerpomperada@aol.com, and jakerpomperada@yahoo.com.

My mobile number here in the Philippines is 09173084360.

My telephone number at home here in Bacolod City, Negros Occidental Philippines is +63 (034) 4335675.

Here in Bacolod City, Negros Occidental I also accepting computer repair, web development using WordPress, Computer Networking, and Arduino Project development at a very affordable price.

My personal website is http://www.jakerpomperada.com

My programming website is http://www.jakerpomperada.blogspot.com

I am also a book author you can purchase my books on computer programming and information technology in the following links below.

https://www.unlimitedbooksph.com/

Program Listing

print()

print("\tMERGE TWO PYTHON DICTIONARIES")

print()

d1 = {'a': 100, 'b': 200}

d2 = {'x': 300, 'y': 200}

d = d1.copy()

d.update(d2)

print(d)

print()

print("\tEND OF PROGRAM")

FINDING THREE HIGHEST VALUES IN A DICTIONARY IN PYTHON

Write a program to find the three highest values in a dictionary and display the result on the screen.

my_dict = {'A': 40, 'B': 60, 'C': 100,

'D': 20, 'E': 90, 'F': 80}

k = Counter(my_dict)

# Finding 3 highest values

high = k.most_common(3)

print()

print("\tFINDING THREE HIGHEST VALUES IN A DICTIONARY")

print()

print("\tInitial Dictionary:")

print()

print("\t",my_dict, "\n")

print("\tDictionary with 3 highest values:")

print("\tKeys: Values")

print()

for i in high:

print("\t",i[0],":", i[1],"")

print()

print("\tEND OF PROGRAM”)

CREATING A NESTED DICTIONARY IN PYTHON

Write a program to create nested dictionary and display the result on the screen.

display_dictionary = {1: 'Fundamentals', 2: 'of', 3: 'Python Programming',

4: {'A': 'Welcome', 'B': 'To', 'C': 'Bacolod City'}}

print()

print("\tCREATING A NESTED DICTIONARY")

print()

print("\tDISPLAY RESULT")

print()

print("\t",display_dictionary);

print()

print("\tEND OF PROGRAM").

COMBINE THREE DICTIONARY ADDING VALUES FOR COMMON KEYS IN PYTHON

Write a program to combine two dictionary-adding values for common keys and display the result on the screen.

from collections import Counter

a1 = {'a': 10, 'b': 20, 'c':30}

a2 = {'a': 20, 'b': 10, 'c':40}

a3 = {'a': 30, 'b': 40, 'c':20}

display_result = Counter(a1) + Counter(a2) + Counter(a3)

print()

print("\tCOMBINE THREE DICTIONARY ADDING VALUES FOR COMMON KEYS")

print()

print("\tDISPLAY RESULT")

print()

print("\t",display_result)

print()

print("\tEND OF PROGRAM")

ITERATE OVER DICTIONARIES USING FOR LOOPS IN PYTHON

Write a program to iterate over dictionaries using for loops and display the result on the screen.

display = {'a': 5,'b':10,'c':15,'d':20,'e':25}

print()

print("\tITERATE OVER DICTIONARIES USING FOR LOOPS")

print()

print("\tDISPLAY RESULT")

print()

for dict_key, dict_value in display.items():

print("\t",dict_key,'->',dict_value)

print()

print("\tEND OF PROGRAM")

ADD NEW ITEM IN THE DICTIONARY IN PYTHON

Write a program to add an item in the dictionary and display the result on the screen.

add_item = {

"brand": "Hyundai",

"model": "Accent",

"year": 2012

}

add_item["color"] = "red"

print()

print("\tADD NEW ITEM IN THE DICTIONARY")

print()

print("\tDISPLAY RESULT")

print()

print(" ",add_item)

print()

print("\tEND OF PROGRAM");

CHECK IF A GIVEN KEY ALREADY EXISTS IN A DICTIONARY IN PYTHON

Write a program to check if a given key already exists in a dictionary and display the result on the screen.

list = {1:5,2:10,3:15,4:20,5:25,6:30,7:35,8:40}

def check_key(a):

if a in list:

print('\tThe key {0} is present in the dictionary.'.format(a))

else:

print('\tThe key {0} is not present in the dictionary.'.format(a))

print()

print("\tCHECK IF A GIVEN KEY ALREADY EXISTS IN A DICTIONARY")

print()

print("\tDISPLAY RESULT")

print()

check_key(7);

print()

print("\tEND OF PROGRAM");

SUM OF ALL THE ITEMS IN THE DICTIONARY IN PYTHON

Write a program, take a dictionary, and print the sum of all the items in the dictionary and display the result on the screen.

Free Programming Source Codes and Computer Programming Tutorials

Wednesday, April 29, 2020

Remove a key from a Dictionary in Python

Multiply all the items in a dictionary in Python

MERGE TWO PYTHON DICTIONARIES

FINDING THREE HIGHEST VALUES IN A DICTIONARY IN PYTHON

CREATING A NESTED DICTIONARY IN PYTHON

COMBINE THREE DICTIONARY ADDING VALUES FOR COMMON KEYS IN PYTHON

ITERATE OVER DICTIONARIES USING FOR LOOPS IN PYTHON

ADD NEW ITEM IN THE DICTIONARY IN PYTHON

CHECK IF A GIVEN KEY ALREADY EXISTS IN A DICTIONARY IN PYTHON

SUM OF ALL THE ITEMS IN THE DICTIONARY IN PYTHON

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