《Learn python3 the hard way》ex7一起来敲代码

1. 如何处理错误
   作者说：从现在开始，把犯的错写在纸上，去做下个练习的时候看看犯的错，尽量不要在练习里再犯
2. print中字符串*n的作用
   将打印内容重复n遍
3. end=""的作用
   在print中第二个参数输入end="",可以把两次print的内容写在一行，中间用双引号内的内容连接
4. 其他的上节课有说。

print("Mary had a little lamb.")  # 打印
print("It's fleece was white as {}.".format('snow'))  # 打印格式化文字
print("And everywhere that Mary went.") #打印
print("."*10)  # what'd that do? # ‘*’可以用来重复*
# 给变量赋值
end1 = "C"
end2 = "h"
end3 = "e"
end4 = "e"
end5 = "s"
end6 = "e"
end7 = "B"
end8 = "u"
end9 = "r"
end10 = "g"
end11 = "e"
end12 = "r"
#end="",括号内可自定义内容。 此处多作用是可以将两次内容连接起来，否则会变成两行
# watch end = ' ' at the end.  try removing it to see what happens
print(end1+end2+end3+end4+end5+end6,end=' ')
print(end7+end8+end9+end10+end11+end12)