请问这个语句是输出什么？ print('{!r}'.format(x))

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This topic created in 3165 days ago, the information mentioned may be changed or developed.

{!r}是指以什么样的格式输出呢？
谢谢了！

Format

输出

语句

5 replies • 2017-11-15 20:50:40 +08:00

ipwx

Nov 13, 2017

repr(x)

enrolls

Nov 14, 2017

善用谷歌啊。https://pyformat.info/

zhusimaji

Nov 14, 2017 via iPhone

是时候了解一下 repr 与 str 区别了

bxtx999

Nov 14, 2017

The str() function is meant to return representations of values which are fairly human-readable, while repr() is meant to generate representations which can be read by the interpreter (or will force a SyntaxError if there is not equivalent syntax). For objects which don ’ t have a particular representation for human consumption, str() will return the same value as repr().

'!a' (apply ascii()), '!s' (apply str()) and '!r' (apply repr()) can be used to convert the value before it is formatted:

>>> import math
>>> print('The value of PI is approximately {}.'.format(math.pi))
The value of PI is approximately 3.14159265359.
>>> print('The value of PI is approximately {!r}.'.format(math.pi))
The value of PI is approximately 3.141592653589793.

saximi

Nov 15, 2017

@ipwx
@enrolls
@zhusimaji
@bxtx999 感谢大家指点！