How to solve these coding challenges:

• Write your solution in PyCharm or in your preferred Python IDE.

• If your solution is not correct, then try to understand the error messages, watch the video again, rewrite the solution, and test it again. Repeat this step until you get the correct solution.

• Save the solution in a file for future reference or recap.

Challenge #1

• Consider the following string declaration which is part of the output of a Linux command.

my_str = 'wlo1 Link encap:Ethernet HWaddr b4:6d:83:77:85:f3'

• Write a Python script that extracts the MAC address (b4:6d:83:77:85:f3) from the string.

• Try to solve the challenge in more than one way.

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Challenge #2

• Display the following strings literally:

It displayed: "You've got an error!"
\n means a new line.
\ is known as the escape character.

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Challenge #3

• Write a Python script that converts foot [ft] to centimeter [cm]. 1 ft = 30.48 cm

• The user will be prompted to enter the value in ft.

• Display the value in cm with 2 decimals, formatted using an f-string.

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Challenge #4

• Write a Python script that tests if a string is a palindrome.

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Challenge #5

• Change the solution of the previous challenge so that both the white spaces and the letter case are ignored when checking if the string is a palindrome.

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Challenge #6

• Write a Python script to get a string made of the first and the last 2 chars from a given string entered by the user.

Sample String: 'Hello!'

Expected Result: 'Heo!'

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Challenge #7

• Write a Python program to get a string from a given string where all occurrences of its first character have been changed to '$', except the first character itself.

Sample String: 'mama'

Expected Result: 'ma$a'

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Challenge #8

• Write a Python program to remove the nth index character from a nonempty string.

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Challenge #9

• Write a Python script that removes the characters which have odd index values of a given string.

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Challenge #10

• Write a Python script that prompts the user for the radius of a circle and calculates its area. Circle's area = pi * r ** 2 where pi = 3.1415

• Using an f-string display the area of the circle with 4 decimal places.

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Challenge #11

• Write a Python script that finds all occurrences of a substring in a given string by ignoring the letter case.

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Challenge #12

• Write a Python script that displays a number with a comma (,) as the thousands separator (US and UK format) and with a period(.) as the thousands separator (EU format).

Sample input number: 1234567

Expected Result: 1,234,567 and 1.234.567

Read the f-strings documentation if needed: https://docs.python.org/3/reference/lexical_analysis.html#f-strings

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