人気のFunction

import os

def file_exists(file_path):
    return os.path.isfile(file_path)

import os

def directory_exists(directory_path):
    return os.path.isdir(directory_path)

def find_median(dataset):
    sorted_list = sorted(dataset)
    length = len(sorted_list)
    if length % 2 == 0:
        return (sorted_list[length // 2 - 1] + sorted_list[length // 2]) / 2
    else:
        return sorted_list[length // 2]

def calculate_variance(data):
    mean = sum(data) / len(data)
    return sum((x - mean) ** 2 for x in data) / len(data)

def calculate_std_deviation(data):
    variance = calculate_variance(data)
    return variance ** 0.5