bars.py

import json
import os
from sys import argv
from math import sqrt


def load_data(filepath):
    if not os.path.exists(filepath):
    	return None
    with open(filepath, encoding = "Windows-1251") as file_handler:
    	return json.load(file_handler)


def get_biggest_bar(data):
    biggest_bar = max(data, key=lambda bar: bar['SeatsCount'])
    biggest_bar_name = biggest_bar['Name']
    return biggest_bar_name


def get_smallest_bar(data):
    smallest_bar = min(data, key=lambda bar: bar['SeatsCount'])
    smallest_bar_name = smallest_bar['Name']
    return smallest_bar_name

def get_distance(bar, longitude, latitude):
    bar_longitude = bar['geoData']['coordinates'][0]
    bar_latitude = bar['geoData']['coordinates'][1]
    dlon = longitude - bar_longitude
    dlat = latitude - bar_latitude
    distance = sqrt(dlon**2 + dlat**2)
    return distance

def get_closest_bar(data):
    closest_bar = min(data, key=lambda x: get_distance(x, longitude, latitude))
    return closest_bar['Name']

def handle_user_input(description):
    try:
        user_input = float(input('Введите {}: '.format(description)))
    except ValueError:
        user_input = None
    return user_input


if __name__ == '__main__':
    our_json = load_data(argv[1])
    print('Самый большой бар: ', get_biggest_bar(our_json))
    print('Самый маленький бар: ', get_smallest_bar(our_json))
    longitude = handle_user_input('широта')
    latitude = handle_user_input('долгота')
    print('Самый близкий бар: ', get_closest_bar(our_json))