In Python, how to specify a format when converting int to string?

In Python, how to specify a format when converting int to string?

%04d where the 4 is the constant length will do what you described.

You can read about string formatting here.

Update for Python 3:

{:04d} is the equivalent for strings using the str.format method or format builtin function. See the format specification mini-language documentation.

You could use the zfill function of str class. Like so –

>>> str(165).zfill(4)
0165

One could also do %04d etc. like the others have suggested. But I thought this is more pythonic way of doing this…

In Python, how to specify a format when converting int to string?

With python3 format and the new 3.6 f notation:

>>> i = 5
>>> {:4n}.format(i)
   5
>>> {:04n}.format(i)
0005
>>> f{i:4n}
   5
>>> f{i:04n} 
0005