On 4/11/2014 5:33 PM, blindanagram wrote:
With:
l = [1,2,3]
this:
print('{0[0]:d}..{0[2]:d}'.format(l))
gives 1..3 but this:
print('{0[0]:d}..{0[-1]:d}'.format(l))
gives:
Traceback (most recent call last):
File "<string>", line 1, in <fragment>
builtins.TypeError: list indices must be integers, not str
which seems to me counterintuitive.
I expected indexing in a format string to behave as it does elsewhere
but this seems not to be true.
Been discussed on the tracker. Consider:
>>> '{0[-1]}'.format({'-1': 'neg int key'})
'neg int key'
Not quoting string keys within the format string introduces ambiguity
settled by 'string unless all digits, then int'.
--
Terry Jan Reedy
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