How to Format Decimal Values to Always Show Two Decimal Places in Python?

Displaying Decimal Values with Specified Precision

In Python, you may encounter the need to display decimal values with a specific number of decimal places. This is particularly useful when handling currency values.

Question:

How can you consistently format decimal values to always show two decimal places, regardless of the actual length or presence of decimals in the initial number?

Solution:

Python 3.6 (Literal String Interpolation):

amount = 49.0
print(f"{amount:.2f}")  # Output: 49.00

Python 3:

from math import pi  # Example: pi ~ 3.141592653589793
print("{0:.2f}".format(pi))  # Output: 3.14

The .2f in the format string specifies that the value should be formatted as a floating-point number with two decimal places.

References:

• [Python String Format Cookbook](https://docs.python.org/3/howto/string-formatting.html#the-string-format-cookbook)
• [pyformat.info](http://pyformat.info/)

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