Use 'classic' string substitutions (ala C's printf). Note the different meanings here of % as the string-format specifier, and the % to apply the list (actually a tuple) to the formatting string.

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

See also String formatting: % vs. .format vs. f-string literal for in-depth comparison of the most common ways to do this kind of string formatting, and How do I put a variable’s value inside a …

103 The OP & accepted answer focus on formatting time, but the OP question itself discusses formatting numbers to strings in Python. In many cases, the output requires additional data …

Aug 3, 2010 · This method of string formatting is the new standard in Python 3.0, and should be preferred to the % formatting described in String Formatting Operations in new code.

Dec 19, 2012 · I do this in Python 2: "(%d goals, $%d)" % (self.goals, self.penalties) What is the Python 3 version of this? I tried searching for examples online but I kept getting Python 2 …

Nov 26, 2010 · They are used for formatting strings. %s acts a placeholder for a string while %d acts as a placeholder for a number. Their associated values are passed in via a tuple using …

Apr 15, 2011 · These string formatting operations have the advantage of working in Python v2 and v3. Take a look at pydoc str sometime: there's a wealth of good stuff in there.

This is effectively a special case of Why do I get "TypeError: not all arguments converted during string formatting" trying to substitute a placeholder like {0} using %? - but because the actual …

47 Solution in Python 3.6+ Python 3.6 introduces literal string formatting, so that you can format the named parameters without any repeating any of your named parameters outside the string: