Python copied the C formatting instructions.
For output, %i
and %d
are the exact same thing, both in Python and in C.
The difference lies in what these do when you use them to parse input, in C by using the scanf()
function. See Difference between format specifiers %i and %d in printf.
Python doesn't have a scanf
equivalent, but the Python string formatting operations retained the two options to remain compatible with C.
The new str.format()
and format()
format specification mini-language dropped support for i
and stuck with d
only.