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Python Dictionary Exercises

#### Exercise 101 Solution

We consider the three Pythons dictionaries which includes all the computer hardwares:
``````dicPC = {"HP": 11, "Acer": 7, "Lenovo": 17, "Del": 23}
dicPhone = {"Sumsung": 22, "Iphone": 9, "Other": 13}
dicTablet = {"Sumsung": 15, "Other": 13}``````
Write a Python program that combines by concatenating these three dictionaries into one.

#### Exrcise 102 Solution

We consider the following dictionary whose keys are the names of the students and the key values are the general averages obtained by passing the final exam:
``````students = {"student_1" : 13 , "student_2" : 17 , "student_3" : 9 , "student_4" : 15 ,
"student_5" : 8 , "student_6" : 14 , "student_7" : 16 , "student_8" : 12 ,
"student_9" : 13 , "student_10" : 15 , "student_11" : 14 , "student_112" : 9 ,
"student_13" : 10 , "student_14" : 12 , "student_15" : 13 , "student_16" : 7 ,
"student_17" : 12 , "student_18" : 15 , "student_19" : 9 , "student_20" : 17 ,}``````
Write a Python program that partitions this dictionary into two sub-dictionaries:
1. admittedStudents whose keys are the admitted students and the key values are the averages obtained (average greater than or equal to 10).
2. nonAdmittedStudents whose keys are non-admitted students and the key values are the averages obtained (average less than or equal to 10).

#### Exercise 103 || Solution

Write a Python program that creates from a keyboard-typed integer n, a dictionary whose keys are integers from 1 to n and key values are their squares. Example for n = 7 the dictionary will be of the form:
``{1: 1, 2: 4, 3: 9, 4:16, 5:25, 6:36, 7:49}``

#### Exercise 104 || Solution

Write a program in Python that asks the user to enter a string, and return him a dictionary whose keys are the characters in the string entered and the values are the number of occurrences of the characters in the string. Example if the entered string is s = 'language', the program returns the dictionary:
``d = {'l': 1, 'a': 2, 'n': 1, 'g': 2, 'e': 1}``

#### Exercise 105 || Solution

Write a function in Python that takes a list of integers as a parameter and returns a dictionary whose keys are the list integers and whose values are "even" or "odd" depending on the number parity.

#### Exercise 106 || Solution

Write a program in Python that asks the user to enter ten integers of their choice and return them a dictionary whose keys are the entered integers and whose values are 'prime' or 'not prime' depending on the entered integer.

#### Exercise 107 || Solution

Write a program in Python that asks the user to enter ten integers of their choice and return them a dictionary whose keys are the integers entered and whose values ​​are the lists of divisors of the numbers entered. Example if the user enters the numbers: 2, 7, 11, 5, 3, 19, 14, 9, 1, 4, the program returns the dictionary:
``````d = {2: [1,2], 7: [1,7], 14: [1,2,7,14],
9: [1,3,9], 11: [1,11], 5: [1,5],
3: [1,3], 19: [1,19], 1: , 4: [1,2,4]}``````

#### Exercise 108 || Solution

Write a python program that asks the user to enter an integer n and return a dictionary whose keys are integers 1, 2, 3, ... n and whose values ​​are 1! , 2! , 3! , … , n!

#### Exercise 109 || Solution

Write a program in Python that asks the user to enter an integer n and return a dictionary whose keys are the integers 1, 2, 3, ... n and whose values ​​are the sums 1, 1+ 2, 1 + 2 + 3,…, 1 + 2 + 3 +… + n.

#### Exercise 110 || Solution

Write a Python program that asks the user to enter a text and return a dictionary whose keys are the words of the text entered and the values are the lengths of the words that make up the text. Example for the text T = "Python is a programming language", the program must return the dictionary:
``d = {'Python': 6, 'is': 3, 'a': 3, 'language': 7, 'de': 2, 'programming': 13}``

#### Exercise 111 || Solution

Write a Python program that asks the user to enter a text and return him a dictionary whose keys are the words of the text entered and the values are the reverse of the words that make up the text. Example for the text T = "Python is easy", the program must return the dictionary:
``d = {'Python': 'nohtyp', 'is': 'si', 'easy': 'ysae'}``

#### Exercise 112 || Solution

Given a dictionary d whose key values are lists. Write a Python program that transforms the dictionary d by sorting the lists. Example for the dictionary:
``d = {'a1': [21, 17, 22, 3], 'a2': [11, 15, 8, 13], 'a3': [7, 13, 2, 11], 'a4': [22,14,7,9]}``
The program should return the dictionary:
``d = {'a1': [3, 17, 21, 22], 'a2': [8, 11, 13, 15], 'a3': [2, 7, 11, 13], 'a4': [7, 9, 14, 22]}``

#### Exercise 113 || Solution

Write a Python program that allows from a given directory to create a dictionary whose keys are the names of the text files located in this directory and the keys are the numbers of the lines of the files.

#### Exercise 114 || Solution

We consider the Pythons dictionary which contains a personal data :
``personalData = {'Name' : 'David' , 'Email' : 'david@gmail.com' , 'Phone' : 33354587 , age' : 27 }``
Write a Python program that save data contained in personalData into a file called data.txt .

#### Exercise 115 || Solution

1) - Write a python program which creates a file named data.txt and write the following lines in this file:

Name: David Email:
david@gmail.com
Phone: 33354587 age: 27

2) - Write a Python program that reads the data.txt file and exports its content to a dictionary:

``d = {'Name': 'David', 'Email': 'david@gmail.com', 'Phone': 33354587, age ': 27}``

#### Exercise 116 || Solution

From the following two lists, create a dictionary by two different methods:
``````keys = ['Name', 'Email', 'Phone']
values = ['Albert', 'albert@gmail.com', 2225668877]``````
The output should be:
``data = {'Name': 'Albert', 'Email': 'albert@gmail.com', 'Phone': 2225668877}``

#### Exercise 117 || Solution

Write a python algorithm as function that verify if a key is present in given dictionary or note.

#### Exercise 118 || Solution

The following dictionary contains a student's math scores:
``scores = {'score1' : 16, 'score2' : 14, 'score3' : 17}``
update the notes dictionary by adding the average of scores.

#### Exercice 119 || Solution

We cosider the following dictionary of length N containing the students names as keys and their score lists as key values:
``d = {'student1': listNote1, 'students2': listNotes2, ..., 'studentN': listNoteN}``
Write a Python program that transforms this dictionary by replacing the score lists with their averages. Example if
``d = {'student1': [14, 16, 18], 'students2': [12, 15, 17], 'student3': [16, 16, 13]}``
, the program returns:
``d = {'student1': 16.0, 'students2': 14.666666666666666, 'student3': 15.0}``

#### Exercise 120 || Solution

Write a python program that transforms a dictionary into an html table and saves the content to an html file called 'convert_dictionary.html'. Example for the dictionary:
``name_email = {'david': 'david@gmail.com', 'hafid': 'hafid@gmail.com', 'nathalie': 'nathalie@gmail.com', 'najib': 'najib @ gmail.com '}``

the program should create an html file that displays the content in an html table: Younes Derfoufi
my-courses.net 