请问这个语句是输出什么？ print('{!r}'.format(x))

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{!r}是指以什么样的格式输出呢？
谢谢了！

Format

输出

语句

5 条回复 • 2017-11-15 20:50:40 +08:00

ipwx

2017-11-13 23:30:35 +08:00

repr(x)

enrolls

2017-11-14 02:43:14 +08:00

善用谷歌啊。https://pyformat.info/

zhusimaji

2017-11-14 08:40:39 +08:00 via iPhone

是时候了解一下 repr 与 str 区别了

bxtx999

2017-11-14 09:07:29 +08:00

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

2017-11-15 20:50:40 +08:00

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