Python output formats

Question

Hi there I\'ve had a search output formats and formats had no luck. I couldn\'t find right documentation for it and I really want to learn how this code works if somebody could

Answer 1

Python supports different ways of formatting strings. Unfortunately, they are not all in the same place in the documentation. So, I guess it makes sense to put them all in one SO answer :)

What you have in the question is printf-style formatting using the modulo (%) operator. For the specification of that see printf-style String Formatting.

Example:

x = 9
print('value of x is %d' % x)

For formatting using the format function, see Format String Syntax.

Example:

x = 9
print('value of x is {x}'.format(x=x))

The same syntax is used as basis for f-strings. See PEP-0498.

Example:

x = 9
print(f'value of x is {x}')

There are also template strings, see Template strings specification. Example:

x = 9
print(string.Template('value of x is $x').substitute(x=x))