Add 2 exercises

Author: Shehab Abdel-Salam

chapters/chapter02_variables/exercises/exercise_ch2_01.py

@@ -1,9 +1,10 @@
-# Exercise 02_01 - Temperature Conversion
-# Write a program that converts a temperature from Celsius to Fahrenheit.
-# Hint: The formula is: F = C * 9/5 + 32
+# Exercise 02_01 - Convert Hours to Seconds
+# Write a program that converts hours to seconds.
 
+# For example, given the number of hours 2, the function should return 7200.
 
-def celsius_to_fahrenheit(celsius):
+
+def hours_to_seconds(hours):
     # Your code should go here.
 
     return ...

chapters/chapter02_variables/exercises/exercise_ch2_05.py

@@ -1,11 +1,9 @@
-# Exercise 02_06 - Binary to Decimal
-# Write a program that takes a binary string as input and
-# returns its decimal representation as an integer.
-# For example, given the binary string "1010", the function should return 10.
-# or given the binary string "1101", the function should return 13.
+# Exercise 02_05 - Temperature Conversion
+# Write a program that converts a temperature from Celsius to Fahrenheit.
+# Hint: The formula is: F = C * 9/5 + 32
 
 
-def convert_binary_to_decimal(binary):
+def celsius_to_fahrenheit(celsius):
     # Your code should go here.
 
     return ...

chapters/chapter02_variables/exercises/exercise_ch2_06.py

@@ -1,13 +1,11 @@
-# Exercise 02_04 - May The Force Be With You
-# Write a program that calculates the force of gravity between two objects.
-# The formula to calculate the force of gravity is:
-# F = G * (m1 * m2) / r^2
-# https://en.wikipedia.org/wiki/Newton%27s_law_of_universal_gravitation
+# Exercise 02_06 - Binary to Decimal
+# Write a program that takes a binary string as input and
+# returns its decimal representation as an integer.
+# For example, given the binary string "1010", the function should return 10.
+# or given the binary string "1101", the function should return 13.
 
-G = 6.674 * 10**-11  # Gravitational constant
 
-
-def calculate_gravity_force(mass1, mass2, distance):
+def convert_binary_to_decimal(binary):
     # Your code should go here.
 
     return ...

chapters/chapter02_variables/exercises/exercise_ch2_07.py

@@ -0,0 +1,13 @@
+# Exercise 02_07 - May The Force Be With You
+# Write a program that calculates the force of gravity between two objects.
+# The formula to calculate the force of gravity is:
+# F = G * (m1 * m2) / r^2
+# https://en.wikipedia.org/wiki/Newton%27s_law_of_universal_gravitation
+
+G = 6.674 * 10**-11  # Gravitational constant
+
+
+def calculate_gravity_force(mass1, mass2, distance):
+    # Your code should go here.
+
+    return ...

chapters/chapter02_variables/tests/test_ch02.py

@@ -1,15 +1,17 @@
-from ..exercises.exercise_ch2_01 import celsius_to_fahrenheit
+from ..exercises.exercise_ch2_01 import hours_to_seconds
 from ..exercises.exercise_ch2_02 import compute_average_grade
 from ..exercises.exercise_ch2_03 import add_numbers
 from ..exercises.exercise_ch2_04 import compute_length_difference
-from ..exercises.exercise_ch2_05 import convert_binary_to_decimal
-from ..exercises.exercise_ch2_06 import calculate_gravity_force
+from ..exercises.exercise_ch2_05 import celsius_to_fahrenheit
+from ..exercises.exercise_ch2_06 import convert_binary_to_decimal
+from ..exercises.exercise_ch2_07 import calculate_gravity_force
 
 
 def test_ch02_e01():
-    assert celsius_to_fahrenheit(0) == 32
-    assert celsius_to_fahrenheit(100) == 212
-    assert celsius_to_fahrenheit(37) == 98.6
+    assert hours_to_seconds(0) == 0
+    assert hours_to_seconds(1) == 3600
+    assert hours_to_seconds(2) == 7200
+    assert hours_to_seconds(3) == 10800
 
 
 def test_ch02_e02():
@@ -34,13 +36,19 @@ def test_ch02_e04():
 
 
 def test_ch02_e05():
+    assert celsius_to_fahrenheit(0) == 32
+    assert celsius_to_fahrenheit(100) == 212
+    assert celsius_to_fahrenheit(37) == 98.6
+
+
+def test_ch02_e06():
     assert convert_binary_to_decimal("0") == 0
     assert convert_binary_to_decimal("10") == 2
     assert convert_binary_to_decimal("11") == 3
     assert convert_binary_to_decimal("100") == 4
 
 
-def test_ch02_e06():
+def test_ch02_e07():
     assert calculate_gravity_force(1, 1) == 9.8
     assert calculate_gravity_force(5, 2) == 19.6
     assert calculate_gravity_force(10, 5) == 49

chapters/chapter03_operators/exercises/exercise_ch3_06.py

@@ -1,22 +1,15 @@
-# Exercise 03_06 - Stats Report
-# Given three numbers that represent the number of wins, losses, and draws of a football team,
-# write a program that generates a report with the following information:
-# 1- The total number of games played.
-# 2- The percentage of games won.
-# 3- The percentage of games lost.
-# 4- The percentage of games drawn.
-# The function should return a string with the report.
-# For example, given the numbers 3, 2, and 1, the function should return:
-# "The team played 6 games. They won 50.0% of the games, lost 33.3% of the games, and drew 16.7% of the games."
-# Note: The percentages should be rounded to one decimal place.
-# You can assume that the input numbers are > 0.
+# Exercise 03_06 - ISBN Verifier
+# Write a program that checks if a given ISBN number is valid.
+# The ISBN is valid if:
+# - It consists of 10 digits.
+# - The first 9 digits are numbers.
+# - The last digit is a number or an uppercase X.
+# - The ISBN is valid if the sum of the 10 digits multiplied by their position modulo 11 is 0.
+# The program should return True if the ISBN is valid and False otherwise.
+# formula: (d1*1 + d2*2 + d3*3 + d4*4 + d5*5 + d6*6 + d7*7 + d8*8 + d9*9 + d10*10) % 11 == 0
 
 
-def generate_stats_report(wins, losses, draws):
-    total_games = None
-    wins_percentage = None
-    losses_percentage = None
-    draws_percentage = None
+def is_valid_isbn(isbn):
     # Your code should go here.
 
-    return f"The team played {total_games} games. They won {wins_percentage}% of the games, lost {losses_percentage}% of the games, and drew {draws_percentage}% of the games."  # noqa
+    return ...

chapters/chapter03_operators/exercises/exercise_ch3_07.py

@@ -0,0 +1,22 @@
+# Exercise 03_07 - Stats Report
+# Given three numbers that represent the number of wins, losses, and draws of a football team,
+# write a program that generates a report with the following information:
+# 1- The total number of games played.
+# 2- The percentage of games won.
+# 3- The percentage of games lost.
+# 4- The percentage of games drawn.
+# The function should return a string with the report.
+# For example, given the numbers 3, 2, and 1, the function should return:
+# "The team played 6 games. They won 50.0% of the games, lost 33.3% of the games, and drew 16.7% of the games."
+# Note: The percentages should be rounded to one decimal place.
+# You can assume that the input numbers are > 0.
+
+
+def generate_stats_report(wins, losses, draws):
+    total_games = None
+    wins_percentage = None
+    losses_percentage = None
+    draws_percentage = None
+    # Your code should go here.
+
+    return f"The team played {total_games} games. They won {wins_percentage}% of the games, lost {losses_percentage}% of the games, and drew {draws_percentage}% of the games."  # noqa

chapters/chapter03_operators/tests/test_ch03.py

@@ -3,7 +3,8 @@
 from ..exercises.exercise_ch3_03 import bitwise_operations
 from ..exercises.exercise_ch3_04 import area_of_triangle
 from ..exercises.exercise_ch3_05 import calculate_hypotenuse
-from ..exercises.exercise_ch3_06 import generate_stats_report
+from ..exercises.exercise_ch3_06 import is_valid_isbn
+from ..exercises.exercise_ch3_07 import generate_stats_report
 
 
 def test_ch03_e01():
@@ -40,6 +41,15 @@ def test_ch03_e05():
 
 
 def test_ch03_e06():
+    assert is_valid_isbn("123456789X") is True
+    assert is_valid_isbn("987654321X") is True
+    assert is_valid_isbn("1234567890") is False
+    assert is_valid_isbn("1234567891") is False
+    assert is_valid_isbn("1234567892") is False
+    assert is_valid_isbn("1234567893") is False
+
+
+def test_ch03_e07():
     assert (
         generate_stats_report(1, 0, 0)
         == r"The team played 1 games. They won 100.0% of the games, lost 0.0% of the games, and drew 0.0% of the games."