chapter04

qiwsir · qiwsir · commit ded6d8159b35 · 2018-07-09T10:41:58.000+08:00
diff --git a/python3code/chapter04/about_self.py b/python3code/chapter04/about_self.py
@@ -0,0 +1,23 @@
+# coding:utf-8
+
+class Person:
+    def __init__(self, name):
+        self.name = name
+
+    def get_name(self):
+        return self.name
+
+    def breast(self, n):
+        self.breast = n
+
+    def color(self, color):
+        print("{0} is {1}".format(self.name, color))
+
+    def how(self):
+        print("{0} breast is {1}".format(self.name, self.breast))
+
+girl = Person('canglaoshi')
+girl.breast(90)
+
+girl.color("white")
+girl.how()
diff --git a/python3code/chapter04/fibsiterator.py b/python3code/chapter04/fibsiterator.py
@@ -0,0 +1,24 @@
+# coding:utf-8
+'''
+filename: fibsiterator.py
+'''
+
+class Fibs:
+    def __init__(self, max):
+        self.max = max
+        self.a = 0
+        self.b = 1
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):       
+        fib = self.a
+        if fib > self.max:
+            raise StopIteration
+        self.a, self.b = self.b, self.a + self.b
+        return fib
+
+fibs = Fibs(10000)
+lst = [fibs.__next__() for i in range(10)]
+print(lst)
diff --git a/python3code/chapter04/schoolwork.py b/python3code/chapter04/schoolwork.py
@@ -0,0 +1,36 @@
+#coding:utf-8
+'''
+    filename: schoolwork.py
+'''
+
+class Student:
+    def __init__(self, name, grade, subject):
+        self.name = name
+        self.grade = grade
+        self.subject = subject
+    def do_work(self, time):
+        if self.grade > 3 and time > 2:
+            return True
+        elif self.grade < 3 and time > 0.5:
+            return True
+        else:
+            return False
+
+class Teacher:
+    def __init__(self, name, subject):
+        self.name = name
+        self.subject = subject
+    def evaluate(self, result=True):
+        if result:
+            return "You are great."
+        else:
+            return "You should work hard"
+
+stu_zhang = Student('zhang', 5, 'math')   
+tea_wang = Teacher('wang', 'math')   
+teacher_said = tea_wang.evaluate(stu_zhang.do_work(1))
+print("Teacher {0} said: {1}, {2}".format(tea_wang.name, stu_zhang.name, teacher_said))
+
+stu_newton = Student('Newton', 6, 'physics')
+teacher_newton = tea_wang.evaluate(stu_newton.do_work(4))
+print("Teacher {0} said: {1}, {2}".format(tea_wang.name, stu_newton.name, teacher_newton))
