import re

lessons = []
row = {}
columns = ['subject', 'weekday', 'time', 'group', 'audience', 'teacher', 'type', 'format']
header = 'Предмет,День недели,Время,Группа,Аудитория,Учитель,Тип урока,Формат урока'

with open('input-csv.yaml', encoding='UTF-8') as f:
    for i in f.readlines()[1:]:
        if i.strip()[0] == '-':
            if row:
                lessons.append(row)
            row = {}
        i = i.split(':')
        i[1] = ':'.join(i[1:])
        i[0] = i[0].replace('-', '').strip()
        i[1] = i[1].replace('"', '""').strip()
        if any(map(lambda x: x in i[1], ['"', ',', "\\n"])):
            i[1] = f'"{i[1]}"'
        row[i[0]] = i[1]
    lessons.append(row)

output = header + '\n'
with open('output.csv', 'w', encoding='UTF-8') as f:
    for i in lessons:
        for key in columns:
            output += i.get(key, '') + ','
        output = output[:-1] + '\n'
    f.write(output)
    print(output)