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:

Use Python 3 string formatting. This is still available in earlier versions (from 2.6), but is the 'new' way of doing it in Py 3. Note you can either use positional (ordinal) arguments, or named …

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%.

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.

print ("Hi") In both versions, % is an operator which requires a string on the left-hand side and a value or a tuple of values or a mapping object (like dict) on the right-hand side. So, your line …

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 …

117 As no one has added it, it should be noted that going forward from Python 2.6+ the recommended way to do string formating is with format, to get ready for Python 3+.

x = 1.23456 print('%.3f' % x) If I want to print the numpy.ndarray of floats, it prints several decimals, often in 'scientific' format, which is rather hard to read even for low-dimensional …