Maks_10

def remove_none_rows(data):
    new_data = []
    for i in range(len(data)):
        if data[i][0] is not None:
            new_data.append(data[i])
    return new_data


def remove_none_colums(data):
    new_data = []
    for i in range(len(data)):
        new_data_row = []
        for j in range(len(data[i])):
            if data[i][j] is not None:
                new_data_row.append(data[i][j])
        new_data.append(new_data_row)
    return new_data


def transform(data):
    for i in range(len(data)):
        data[i][0] = (f"{data[i][0].split('.')[2]}-"
                      f"{data[i][0].split('.')[1]}-"
                      f"{data[i][0].split('.')[0][2:]}")
        data[i][1] = str(int(data[i][1].replace('%', '')) / 100)
        data[i][2] = f"{data[i][2].split(' ')[0]}-{data[i][2].split(' ')[1]}"
        data[i][3] = data[i][3].replace('[at]', '@')
    return data


def sorting(data):
    data = list(sorted(data, key = lambda x: x[2]))
    return data


def transport(data):
    new_data = [[] for _ in range(len(data[0]))]
    for i in range(len(new_data)):
        for j in range(len(data)):
            new_data[i].append(data[j][i])
    (new_data[0],
     new_data[1],
     new_data[2],
     new_data[3]) = (new_data[0],
                     new_data[1],
                     new_data[2],
                     new_data[3])
    return new_data


def main(data):
    data = remove_none_rows(data)
    data = remove_none_colums(data)
    data = transform(data)
    data = sorting(data)
    data = transport(data)
    return data