关于python：如何在Python3中打印格式化的字符串？


How to print formatted string in Python3?

嘿，关于这个我有个问题

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print ("So, you're %r old, %r tall and %r heavy.") % (
    age, height, weight)

该行在python 3.4中不起作用，有人知道如何解决这个问题吗？

在python 3.6中引入了F字符串。

你可以这样写

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print (f"So, you're {age} old, {height} tall and {weight} heavy.")

有关详细信息，请参阅：https://docs.python.org/3/whatsnew/3.6.html

您需要将格式应用于字符串，而不是print()函数的返回值：

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print("So, you're %r old, %r tall and %r heavy." % (
    age, height, weight))

注意)右括号的位置。如果它有助于理解差异，请首先将格式化操作的结果赋给变量：

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output ="So, you're %r old, %r tall and %r heavy." % (age, height, weight)
print(output)

你写：

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print ("So, you're %r old, %r tall and %r heavy.") % (age, height, weight)

当正确的是：

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print ("So, you're %r old, %r tall and %r heavy." % (age, height, weight))

除此之外，您还应该考虑切换到"new".格式样式，它更像是Python式的，不需要类型声明。从python 3.0开始，但返回到2.6+

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print("So, you're {} old, {} tall and {} heavy.".format(age, height, weight))
#or for pinning(to skip the variable expanding if you want something
#specific to appear twice for example)
print("So, you're {0} old, {1} tall and {2} heavy and {1} tall again".format(age, height, weight))

尽管我不知道您会遇到什么异常，但您可以尝试使用格式化函数：

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print ("So, you're {0} old, {1} tall and {2} heavy.".format(age, height, weight))

正如其他答案中提到的，你的括号显然有些问题。

如果您想使用format，我仍将保留我的解决方案作为参考。

更简单的方法：

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print ("So, you're",age,"r old,", height," tall and",weight," heavy." )

您的语法有问题，在...) % (
age, height, weight)附近。

您已经关闭了printbrfore %操作符。这就是为什么print函数不携带您正在传递的参数的原因。在你的代码中这样做，

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print ("So, you're %r old, %r tall and %r heavy." % (
    age, height, weight))