Python v2.7 introduced a new string fomatting method, that is now the default in Python3. I started this string formatting cookbook as a quick reference to help me format numbers and strings. Thanks to other contributors I’ve expanded the examples over time. Python 3.6 introduced, formatted string literals, often referred to as f-strings as another method to help format strings.
Jump to the new F-strings section below. The following table shows various ways to format numbers using Python’s str.format[], including examples for both float formatting and integer formatting.Number Formatting
To run examples use: print["FORMAT".format[NUMBER]];
To get the output of the first example, formatting a float to two decimal places, you would run:
print["{:.2f}".format[3.1415926]];
| 3.1415926 | {:.2f} | 3.14 | Format float 2 decimal places |
| 3.1415926 | {:+.2f} | +3.14 | Format float 2 decimal places with sign |
| -1 | {:+.2f} | -1.00 | Format float 2 decimal places with sign |
| 2.71828 | {:.0f} | 3 | Format float with no decimal places |
| 5 | {:0>2d} | 05 | Pad number with zeros [left padding, width 2] |
| 5 | {:x Chủ Đề |