10-days-of-statistics-python-1.py

10-days-of-statistics-python-1.py

import sys
import functools
import statistics

lines = sys.stdin.readlines()

nOfLines = int(lines[0][:-1])

nlist = [float(x) for x in lines[1].split()]

    
def summation(arr):
    return functools.reduce(lambda a, b: a+b, arr);
def mean(arr, n):
    return summation(arr)/n;    

def median(arr, n):
    arr.sort()
    mid_1 = int(n/2)-1;
    mid_2 = int(n/2);
    return (arr[mid_1]+arr[mid_2])/2;

def most_frequent(List):
    return max(set(List), key = List.count)    
def mode(arr, n):
    count = {}
    current_mode = min(arr);
    prev_counter = 1
    for elem in arr:
        key = str(elem)
        if (key not in count):
            count[key] = 1;
        else:
            count[key] += 1;
    for k in count:
        if (count[k] > 1 and current_mode != k and prev_counter < count[k]):
            current_mode = k
            prev_counter = count[k];
    return int(float(current_mode));
    
    
print(mean(nlist, nOfLines))
print(median(nlist, nOfLines))
print(mode(nlist, nOfLines))