Merge pull request #33 from code-for-tomorrow/kehao-chapter12

Add Ch. 12 exercises

Author: phrdang

2_intermediate/chapter12/practice/student_class.py

@@ -0,0 +1,5 @@
+# Create a class called Student with instance attributes: name and age.
+# The user can input the name and age. Add 2 methods to the class:
+# 1. A raise_hand method which prints out the student's name followed
+# by "is now raising their hand."
+# 2. A grow_older method that makes the student older by 1 year.

2_intermediate/chapter12/practice/teacher_class.py

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+# Create a class called Teacher. Add 3 instance variables to this
+# class: name, age, and students (a list of Student objects).
+# Add 2 Methods to the class: A display_students method that
+# prints out the names of all the students, each on their own line, and
+# a graduate_students method that increments the age of all of the
+# teacher's Students by 1. Then it should print out all their ages.
+
+# Student class implemented below. Teacher class uses it.
+
+
+class Student:
+    def __init__(self, name, age):
+        self.name = name
+        self.age = age
+
+    def raise_hand(self):
+        print(self.name + " is now raising their hand.")
+
+    def grow_older(self):
+        self.age += 1

2_intermediate/chapter12/solutions/student_class.py

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+# Create a class called Student with instance attributes: name and age.
+# The user can input the name and age. Add 2 methods to the class:
+# 1. A raise_hand method which prints out the student's name followed
+# by "is now raising their hand."
+# 2. A grow_older method that makes the student older by 1 year.
+
+
+class Student:
+    def __init__(self, name, age):
+        self.name = name
+        self.age = age
+
+    def raise_hand(self):
+        print(self.name + " is now raising their hand.")
+
+    def grow_older(self):
+        self.age += 1

2_intermediate/chapter12/solutions/teacher_class.py

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+# Create a class called Teacher. Add 3 instance variables to this
+# class: name, age, and students (a list of Student objects).
+# Add 2 Methods to the class: A display_students method that
+# prints out the names of all the students, each on their own line, and
+# a graduate_students method that increments the age of all of the
+# teacher's Students by 1. Then it should print out all their ages.
+
+# Student class implemented below. Teacher class uses it.
+
+
+class Teacher:
+    def __init__(self, name, age, students):
+        self.name = name
+        self.age = age
+        self.students = students
+
+    def display_students(self):
+        for student in self.students:
+            print(student.name)
+
+    def graduate_students(self):
+        for student in self.students:
+            student.grow_older()
+            print(student.age)
+
+
+class Student:
+    def __init__(self, name, age):
+        self.name = name
+        self.age = age
+
+    def raise_hand(self):
+        print(self.name + " is now raising their hand.")
+
+    def grow_older(self):
+        self.age += 1