#round
Description: Calculate the approximate value (rounding).
def round(number, ndigits=None):
'''
Calculate the approximate value
:param number: The value to be rounded
:param ndigits: Number of decimal places to keep
:return: The rounded value
'''
Example:
print(round(3.1415926))
print(round(3.1415926, 2))
print(round(2.71828))
print(round(2.71828, 2))