练习：
1. 在Python交互环境中下⾯的代码查看结果并将内容翻译成中⽂。
import this
#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.
#Now is better than never.
#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!
print(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!
Python的禅宗 Tim Peters
美丽总比丑陋好
显式比隐式好
简单总比复杂好
复杂总比晦涩好。
扁平比嵌套好。
稀疏总比稠密好。
可读性。
特殊情况不足以特殊到违反规则。
虽然实用性胜过纯洁性。
错误不应该悄无声息地过去。
除非显式地沉默。
面对模棱两可，拒绝猜测的诱惑。
应该有一种——最好只有一种——显而易见的方法。
不过，除非你是荷兰人，否则这种方式一开始可能并不明显。
现在总比没有好。
虽然从来没有比现在更好。
如果实现很难解释，那么这不是一个好主意。
如果实现很容易解释，那么这可能是一个好主意。
名称空间是一个很棒的想法——让我们来做更多这样的事情
2. 学习使⽤turtle在屏幕上绘制图形。
import turtle
turtle.pensize(5.5)
turtle.pencolor('yellow')
turtle.circle(50,steps=3) # 三角形
turtle.circle(50) # 整圆
turtle.forward(300)
turtle.right(90)
turtle.forward(100)
turtle.right(90)
turtle.forward(200)
turtle.right(90)
turtle.forward(100)
turtle.mainloop()
