第二章
数据与数据类型
#自定义变量，并打印一句话
simple_message = "Welcome python"
print(simple_message)
Welcomr python
#修改变量值再将其打印
simple_message = "Welcome python"
print(simple_message)
simple_message = "Hello python cresh course reader!"
print(simple_message)
Welcome python
Hello python cresh course reader!
#个性化消息
name = "li wei jia"
print("Hello " + name.title() + ",Would you like to learn some python today " + "!")
Hello Li Wei Jia,Would you like to learn some python today !
#调整名字的大小写
name = "Ya li shan da "
print(name.title())
print(name.upper())
print(name.lower())
Ya Li Shan Da
YA LI SHAN DA
ya li shan da
#名言
famous_person = "李白"
celebrated_dictum = "人生得意须尽欢"
word = famous_person + "说过" + celebrated_dictum
print(word)
李白说过人生得意须尽欢
#剔除人名中的空白
name = "\thanxin\tyouxiu\t "
print(name.rstrip())
print(name.lstrip())
print(name.strip())
hanxin youxiu
hanxin youxiu
hanxin youxiu
#数字计算
print(5+3)
print(5*3)
print(5/3)
print(5**3)
8
15
1.6666666666666667
125
#最喜欢的数字
num = 8
message = "My favorite number is " + str(num)
print(message)
My favorite number is 8
#Python 之禅
import this
The Zen of Python, by Tim Peters
Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren't special enough to break the rules.
Although practicality beats purity.
Errors should never pass silently.
Unless explicitly silenced.
In the face of ambiguity, refuse the temptation to guess.
There should be one-- and preferably only one --obvious way to do it.
Although that way may not be obvious at first unless you're Dutch.
Now is better than never.
Although never is often better than *right* now.
If the implementation is hard to explain, it's a bad idea.
If the implementation is easy to explain, it may be a good idea.
Namespaces are one honking great idea -- let's do more of those!