Code Challenges

133 - Create a class "Person" with properties for name, age, and address. Create methods for introducing the person and for printing their information.

Python

Object Oriented Programming

31 - Create a dictionary of 5 countries and their respective capitals, then retrieve and print the capital of a user-specified country.

Python

Data Types

Dictionaries

96 - Create a function that takes in a string and returns the number of characters

Python

Strings

Functions

56 - Write a program that takes in a dictionary of strings (string keys and string values) and outputs the keys of the entries that have a value starting with 'A'.

Python

Dictionaries

If Statements

43 - Write a program that takes a string as input, and returns True if the string is a valid email address, and False if it is not, using an if statement and string methods.

Python

Strings

If Statements

42 - Write a program that takes a string as input, and returns the string with the first letter capitalized, using an if statement and string methods.

Python

Strings

If Statements

124 - Create a function that takes in a dictionary where the keys are strings and the values are integers, and returns a new dictionary where the keys are the same strings but with the values doubled.

Python

Dictionaries

Functions

40 - Write a program that takes a string input from the user and prints the number of occurrences of each letter in the string. The output should be displayed in the format of "Letter 'X' occurs Y times".

Python

Strings

If Statements

212 - Write a function to test if two dictionaries are equal and write test cases for it.

Python

Testing

99 - Create a function that takes in a list of numbers and returns the mode of the numbers.

Python

Numbers

Functions

12 - Write a program that prompts the user for a string, and then prints whether it is a palindrome or not

Python

Data Types

Booleans

38 - Write a program that takes in a number and determines if it is a prime number.

Python

Numbers

If Statements

235 - Test a class that represents a bank account: Write a BankAccount class that has attributes for the account holder's name, account number, and balance. Then, write test cases to ensure that the class works correctly, including testing the initialization of the object, deposit and withdraw methods, and checking that the account balance is updated correctly.

Python

Testing

174 - Create a program that calculates the perimeter and area of a rectangle and saves the functions in a module. Import the module into another program and allow the user to input the length and width of the rectangle.

Python

Modules and Packages

24 - Write a program that prompts the user for a list of words and then converts the list into a set, removes any duplicates and returns the set.

Python

Data Types

Sets

90 - Create a function that takes in a string and returns a list of all the characters

Python

Strings

Functions

75 - Write a program that takes a list of numbers and returns the second largest number.

Python

Numbers

For Loops

215 - Write a function to test if a given password meets certain security requirements (e.g. length, use of numbers, use of special characters) and write test cases for it.

Python

Testing

147 - Create a class Animal with a method speak that takes in a string argument and prints the string to the console. Create subclasses Cat, Dog, and Horse and override the speak method in each subclass to print the corresponding animal's sound.

Python

Object Oriented Programming

81 - Create a function that takes in a dictionary and returns the keys

Python

Dictionaries

Functions

180 - Create a program that converts a given weight from one unit to another (e.g. grams to pounds). Store the conversion functions in a module, and import the module into another program to display the converted weights.

Python

Modules and Packages

95 - Create a function that takes in a list of numbers and returns a new list of all elements multiplied by 2

Python

Numbers

Functions

44 - Write a program that checks if a given string is empty, and outputs True if it is empty and False if it isn't.

Python

Booleans

If Statements

192 - What is wrong with the code below?

Python

Debugging

201 - What is wrong with the code below?

Python

Debugging

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