Use f-strings if you just need to format something on the spot to print or create a string for other reasons, str.format() to store the template string for re-use and then interpolate values.

For reference: Python 3 documentation for the newer format() formatting style and the older % -based formatting style.

Jul 22, 2019 · 63 In Python 3.6, the f-string, formatted string literal, was introduced (PEP 498). In short, it is a way to format your string that is more readable and fast. Example:

Mar 15, 2011 · Given a float between 0 and 1, how to print it as a percentage? For example, 1/3 should print as 33%.

The previous answers have used % formatting, which is being phased out in Python 3.0+. Assuming you're using Python 2.6+, a more future-proof formatting system is described here:

Take a look on pprint, The pprint module provides a capability to “pretty-print” arbitrary Python data structures in a form which can be used as input to the interpreter.

Jun 22, 2017 · 206 I like the pprint module (Pretty Print) included in Python. It can be used to either print the object, or format a nice string version of it.

The format specifier inside the curly braces follows the Python format string syntax. Specifically, in this case, it consists of the following parts: The empty string before the colon means "take the …

The % outside and after the string is telling python that you intend to use the previous string as the format string and that the following data should be put into the format specified.

Then you place whatever you want to put within your string, variables, numbers, inside braces f'some string text with a {variable} or {number} within that text' - and Python evaluates as with …