Python function to round number to significant figures

sig_figs.py

from math import floor, log10


def sig_figs(x: float, precision: int):
    """
    Rounds a number to number of significant figures

    Parameters:
    - x - the number to be rounded
    - precision (integer) - the number of significant figures

    Returns:
    - float
    """

    x = float(x)
    precision = int(precision)

    return round(x, -int(floor(log10(abs(x)))) + (precision - 1))
  
  
"""Examples"""
assert sig_figs(1346, 1) == 1000
assert sig_figs(1346, 3) == 1350
assert sig_figs(0.001346, 1) == 0.001
assert sig_figs(0.001346, 3) == 0.00135


"""
Other implementations of this covered in this Stack Overflow thread
https://stackoverflow.com/questions/3410976/how-to-round-a-number-to-significant-figures-in-python
"""