python-tutorials/tests/Variables.py

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# -*- coding: utf-8 -*-
# Python 程序的变量variables定义
# Version: 0.1
# Author: YuCheng Hu
# 创建变量和指定变量类型
x = 1 # 变量赋值定义一个变量x
print(id(x)) # 打印变量x的标识
print(x + 1) # 使用变量
x = 2 # 量赋值定义一个变量x
print(id(x)) # 此时的变量x已经是一个新的变量
print(x + 1) # 名称相同但是使用的是新的变量x
x = 4 # x 是整数类型的
x = "OSSEZ" # x 类型将会修改为字符串
print(x)
print("==================")
x = 5
y = "John"
print(x)
print(y)
# 类型转换
x1 = str(3) # x will be '3'
x2 = int(3) # y will be 3
x3 = float(3) # z will be 3.0
x4 = chr(31243) # z will be 3.0
x5 = ord('') # z will be 3.0
# 获得类型
print("==================")
x = 5
y = "John"
print(type(x))
print(type(y))