Python - short way to unpack list for string formatting operator?

问题

Variations of the * or ** operators don't seem to work, unfortunately:

lstData = [1,2,3,4]
str = 'The %s are %d, %d, %d, and %d' % ('numbers', *lstData)

Is there an easy way?

回答1:

Use format:

str = 'The {} are {}, {}, {}, and {}'.format('numbers', *lstData)

see the docs for more details about possible formatting (floats, decimal points, conversion, ..).

回答2:

s = 'The %s are %d, %d, %d, and %d' % tuple(['numbers'] + lstData)

回答3:

>>> data = range(5)
>>> 'The {0} are {1}, {2}, {3}, {4} and {5}'.format('numbers', *data)
'The numbers are 0, 1, 2, 3 and 4'

来源：https://stackoverflow.com/questions/7978144/python-short-way-to-unpack-list-for-string-formatting-operator