Python statistics geometric.mean() Function

The pythonstatistics.geometric_mean() function is an iterable function, that converts data to floats and calculates the geometric mean.

If the function contains a zero or negative value, then this raisesStatisticsError.

Syntax

Following is the basic syntax of thestatistics.geometric_mean() function −

statistics.geometric_mean(data, weights=None)

Parameter

Here, the data and weight values can be used as any sequence, list or iterator.

Return Value

This function always returns a float arithmetic mean of data, which can be a sequence or iterator.

Example 1

In the below example, we are calculating the arithmetic mean of the given data usingstatistics.geometric_mean() function.

import statisticsx = statistics.geometric_mean([54, 24, 36])print(x)

Output

The result obtained is as follows −

36.000000000000014

Example 2

Here we are calculating the arithmetic mean for the float values usingstatistics.geometric_mean() function.

import statisticsx = statistics.geometric_mean([0.54, 2.34, 36.2])print(x)

Output

This produces the following result −

3.576344906149784

Example 3

Now, we are passing decimal values to find the mean of the given data usingstatistics.geometric_mean() function.

import statisticsfrom decimal import Decimal as Dx = statistics.geometric_mean([D("0.15"), D("0.175"), D("0.65"), D("0.35")])print(x)

Output

The result is obtained as follows −

0.27798904219477544

Example 4

If we pass datatype other than double or integer tostatistics.geometric_mean() function, then it will throw error. In the below example we are passing string value, hence the code returns TypeError.

import statisticsx = statistics.geometric_mean("welcome to tutorialspoint")print(x)

Output

The output obtained is as follows −

Traceback (most recent call last):  File "/usr/lib/python3.10/statistics.py", line 344, in fmean    n = len(data)TypeError: object of type 'map' has no len()During handling of the above exception, another exception occurred:Traceback (most recent call last):  File "/home/cg/root/91470/main.py", line 2, in <module>    x = statistics.geometric_mean("welcome to tutorialspoint")  File "/usr/lib/python3.10/statistics.py", line 374, in geometric_mean    return exp(fmean(map(log, data)))  File "/usr/lib/python3.10/statistics.py", line 352, in fmean    total = fsum(count(data))  File "/usr/lib/python3.10/statistics.py", line 350, in count    for n, x in enumerate(iterable, start=1):TypeError: must be real number, not str