pandas.set_eng_float_format#

pandas.set_eng_float_format(accuracy=3, use_eng_prefix=False)[source]#

Format float representation in DataFrame with SI notation.

Deprecated since version 3.1.0: Use pd.set_option("display.precision", N) to control decimal precision, or pass a custom callable to pd.set_option("display.float_format", func).

Sets the floating-point display format for DataFrame objects using engineering notation (SI units), allowing easier readability of values across wide ranges.

Parameters:

accuracyint, default 3: Number of decimal digits after the floating point.
use_eng_prefixbool, default False: Whether to represent a value with SI prefixes.

Returns:

None: This method does not return a value. it updates the global display format for floats in DataFrames.

See also

set_option: Set the value of the specified option or options.
reset_option: Reset one or more options to their default value.

Examples

Use pd.set_option("display.precision", N) to control decimal precision instead:

>>> with pd.option_context("display.precision", 3):
...     print(pd.DataFrame([1e-9, 1e-3, 1, 1e3, 1e6]))
           0
0  1.000e-09
1  1.000e-03
2  1.000e+00
3  1.000e+03
4  1.000e+06