Update operater_test.py

Author: progzc

exercise/operater_test.py

@@ -1,3 +1,40 @@
+# present = input('大圣想要什么礼物呢？')
+# print(present, type(present))
+
+print(1 + 1)
+print(1 - 1)
+print(2 * 4)
+print(1 / 2)  # 0.5
+print(11 / 2)  # 5.5
+print(11 // 2)  # 5
+print(11 % 2)  # 1
+
+print(9 // 4)  # 2
+print(-9 / -4)  # 2
+print(9 // -4)  # -3 向下取整
+print(-9 // 4)  # -3
+
+print(9 % -4)  # -3 余数 = 被除数 - 除数 * 商
+print(-9 % 4)  # 3 余数 = 被除数 - 除数 * 商
+
+a = 3 + 4
+b = c = d = 20  # 链式赋值
+print(b, id(b))
+print(c, id(c))
+print(d, id(d))
+e, f, g = 20, 30, 40  # 解包赋值
+h = 10
+print(h, type(h))
+h /= 3
+print(h, type(h))
+
+m = 1
+n = 2
+m, n = n, m
+print(m, n)
+
+# ==用于比较对象的值,is用于比较对象的标识
+
 a, b = 1, 2
 print(a == 1 and b < 2)
 print(a == 1 or b < 2)