Catog的博客

第十节 Numpy10.1 数组创建NumPy 用于处理数组。 NumPy 中的数组对象称为 ndarray。可以使用 array() 函数创建一个 NumPy ndarray 对象。可以将列表、元组或任何类似数组的对象传递给 array() 方法，然后它将被转换为 ndarray。import numpy as np arr = np.array([1, 2, 3, 4, 5])arr = np.array((1, 2, 3, 4, 5))print(arr)print(type

第三节 语句3.1 If语句a = 200b = 66if b > a: print("b is greater than a")elif a == b: print("a and b are equal")else: print("a is greater than b")a = 200b = 66c = 500if a > b and c > a: print("Both conditions are True")a = 200b = 66

第一节 基本语法变量直接赋值不用定义x = 5y = "John"print(x)print(y)强制类型转换x = str(3) # x will be '3'y = int(3) # y will be 3z = float(3) # z will be 3.0获取变量类型x = 5y = "John"print(type(x))print(type(y))单双引号相同x = "John"x = 'John'多变量命名x,