How Can I Remove Trailing Zeros from Formatted Floats in Python?

Removing Trailing Zeros from Formatted Floats

Eliminating trailing zeros in formatted floats enhances readability and minimizes string length for compact data representation. To achieve this, Python offers a solution using the '%g' format specifier.

The '%g' specifier designates a versatile formatting option that adjusts to the magnitude of the float being formatted. For floats of magnitude zero or one, '%g' produces an integer-only string, omitting the decimal point and any trailing zeros. For floats of larger magnitudes, '%g' retains the decimal point and significant digits while dropping any insignificant trailing zeros.

For example:

>>> '{0:g}'.format(3.140)
'3.14'

In this case, the trailing zero is removed from the formatted string, resulting in a concise representation of the floating-point value.

Python 2.6 and later versions provide an alternative approach using the format function:

>>> '{0:g}'.format(3.140)
'3.14'

Python 3.6 and above further simplifies this process with f-strings:

>>> f'{3.140:g}'
'3.14'

By employing the '%g' format specifier, you can efficiently format floats without trailing zeros, ensuring a compact and informative data presentation.

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