pythonbasics.org/exercises/

https://pythonbasics.org/exercises/
Python Practice

SOLUTIONS: https://pythonbasics.org/pythonbasics-exercise-answers.pdf

Beginner exercises
Run Python programs
    • Make a Python program that prints your name.
    • Make a program that displays the lyrics of a song.
Variables
    • Make a program that displays several numbers.
    • Make a program that solves and shows the summation of 64 + 32.
    • Do the same as in 2, but make it sum x + y.
Strings
    • Make a program that displays your favourite actor/actress.
    • Try to print the word ‘lucky’ inside s.
    • Try to print the day, month, year in the form “Today is 2/2/2016”.
String replace
    • Try the replace program
    • Can a string be replaced twice?
    • Does replace only work with words or also phrases?
String find
    • Find out if string find is case sensitive
    • What if a query string appers twice in the string?
    • Write a program that asks console input and searches for a query.
String join
    • Create a list of words and join them, like the example above.
    • Try changing the seperator string from a space to an underscore.
String split
    • Can a string be split on multiple characters?
    • Can you split a string this string?: World,Earth,America,Canada
    • Given an article, can you split it based on phrases?
Random numbers
    • Make a program that creates a random number and stores it into x.
    • Make a program that prints 3 random numbers.
    • Create a program that generates 100 random numbers and find the frequency of each number.
Keyboard input
    • Make a program that asks a phone number.
    • Make a program that asks the users preferred programming language.
If statements
    • Make a program that asks the number between 1 and 10. If the number is out of range the program should display “invalid number”.
    • Make a program that asks a password.
For loops
    1. Make a program that lists the countries in the set
clist = ['Canada','USA','Mexico','Australia']
    2. Create a loop that counts from 0 to 100
    3. Make a multiplication table using a loop
    4. Output the numbers 1 to 10 backwards using a loop
    5. Create a loop that counts all even numbers to 10
    6. Create a loop that sums the numbers from 100 to 200
While loops
    1. Make a program that lists the countries in the set below using a while loop.
clist = ["Canada","USA","Mexico"]
    2. What’s the difference between a while loop and a for loop?
    3. Can you sum numbers in a while loop?
    4. Can a for loop be used inside a while loop?
Functions
    1. Make a function that sums the list mylist = [1,2,3,4,5]
    2. Can functions be called inside a function?
    3. Can a function call itself? (hint: recursion)
    4. Can variables defined in a function be used in another function? (hint: scope)
Lists
    • Make a program that displays the states in the U.S.
states = [ 'Alabama', .. ,'Wyoming' ]
    • Display all states starting with the letter M
List operations
    • Given the list y = [6,4,2] add the items 12, 8 and 4.
    • Change the 2nd item of the list to 3.
Sorting list
    • Given a list with pairs, sort on the first element
x = [ (3,6),(4,7),(5,9),(8,4),(3,1)]
    • Now sort on the second element
Range function
    • Create a list of one thousand numbers
    • Get the largest and smallest number from that list
    • Create two lists, an even and odd one.
Dictionary
    • Make a mapping from countries to country short codes
    • Print each item (key and value)
Read file
    • Read a file and number every line
    • Find out what the program does if the file doesn’t exist.
    • What happens if you create a file with another user and try to open it?
Write file
    • Write the text “Take it easy” to a file
    • Write the line open(“text.txt”) to a file
Nested loops
    • Given a tic-tac-toe board of 3x3, print every position
    • Create a program where every person meets the other
persons = [ “John”, “Marissa”, “Pete”, “Dayton” ]
    • If a normal for loop finishes in n steps O(n), how many steps has a nested loop?
Slices
    • Take a slice of the list below:
pizzas = [“Hawai”,”Pepperoni”,”Fromaggi”,”Napolitana”,”Diavoli”]
    • Given the text “Hello World”, take the slice “World”
Multiple return
    • Create a function that returns a,b and a+b
    • Create a function that returns 5 variables
Scope
    • Add a function reduce amount that changes the variable balance
    • Create a function with a local variable
Time and date
    • Print the date in format year-month-day
Try except
    • Can try-except be used to catch invalid keyboard input?
    • Can try-except catch the error if a file can’t be opened?
    • When would you not use try-except?
OOP exercises
Class
    • Can you have more than one class in a file?
    • Can multiple objects be created from the same class?
    • Can objects create classes?
    • Using the code above, create another object
    • Add a method to the class: location()
Getter and setter
    • Add a variable age and create a getter and setter
    • Why would you use getter and setter methods?
Modules
    • Import the math module and call the sin function
    • Create your own module with the function snake()
Inheritance
    • Create a new class that inherits from the class App
    • Try to create a class that inherits from two super classes (multiple inheritance)
Static method
    • Can a method inside a class be called without creating an object?
    • Why does not everybody like static methods?
Iterable
    • What is an iterable?
    • Which types of data can be used with an iterable?
Classmethod
    • What is a classmethod?
    • How does a classmethod differ from a staticmethod?
Multiple inheritance
    • Do all programming languages support multiple inheritance?
    • Why would you not use multiple inheritance?
    • Is there a limit to the number of classes you can inherit from?