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构造字符串
你会经常需要打印字符串。要是有很多变量,避免下面这样:
name = "Raymond"
age = 22
born_in = "Oakland, CA"
string = "Hello my name is " + name + "and I'm " + str(age) + " years old. I was born in " + born_in + "."
print(string)
额,这看起来多乱呀?你可以用个漂亮简洁的方法来代替, .format 。
这样做:
name = "Raymond"
age = 22
born_in = "Oakland, CA"
string = "Hello my name is {0} and I'm {1} years old. I was born in {2}.".format(name, age, born_in)
print(string)
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