How to comment this code correctly?

Question

Python

Please help me comment the code

import xml.etree.ElementTree as XmlElementTree
import httplib2
import uuid
#импорт нативных библиотек 
from config import ***
#импорт конфига
 
***_HOST = '***'
***_PATH = '/***_xml'
CHUNK_SIZE = 1024 ** 2
#?
 
def speech_to_text(filename=None, bytes=None, request_id=uuid.uuid4().hex, topic='notes', lang='ru-RU',
                   key=***_API_KEY):
  
    if filename:
        with open(filename, 'br') as file:
            bytes = file.read()
    if not bytes:
        raise Exception('Neither file name nor bytes provided.')
 
  
    bytes = convert_to_pcm16b16000r(in_bytes=bytes)
 
    
    url = ***_PATH + '?uuid=%s&key=%s&topic=%s&lang=%s' % (
        request_id,
        key,
        topic,
        lang
    )
 #метод обработки файла
    
    chunks = read_chunks(CHUNK_SIZE, bytes)
 
    
    connection = httplib2.HTTPConnectionWithTimeout(***_HOST)
 #подключение к страницы для передачи заголовка
    connection.connect()
    connection.putrequest('POST', url)
    connection.putheader('Transfer-Encoding', 'chunked')
    connection.putheader('Content-Type', 'audio/x-pcm;bit=16;rate=16000')
    connection.endheaders()
 
  
    for chunk in chunks:
        connection.send(('%s\r\n' % hex(len(chunk))[2:]).encode())
        connection.send(chunk)
        connection.send('\r\n'.encode())
 
    connection.send('0\r\n\r\n'.encode())
    response = connection.getresponse()
 #отправка и получение ответа
    
    if response.code == 200:
        response_text = response.read()
        xml = XmlElementTree.fromstring(response_text)
 #?
        if int(xml.attrib['success']) == 1: 
            max_confidence = - float("inf")
            text = ''
 
            for child in xml:
                if float(child.attrib['confidence']) > max_confidence:
                    text = child.text
                    max_confidence = float(child.attrib['confidence'])
 
            if max_confidence != - float("inf"):
                return text
            else:
                
                raise SpeechException('No text found.\n\nResponse:\n%s' % (response_text))
        else:
            raise SpeechException('No text found.\n\nResponse:\n%s' % (response_text))
    else:
        raise SpeechException('Unknown error.\nCode: %s\n\n%s' % (response.code, response.read()))
 
сlass SpeechException(Exception):
    pass

Answer 1

Write not what you are doing (this can be seen from the code), but why or why. And only where it's not obvious.

Answer 2

# import xml.etree.ElementTree as XmlElementTree
# import httplib2
# import uuid
# # импорт нативных библиотек 
# from config import ** *
# # импорт конфига
# 
# ** *_HOST = '***'
# ** *_PATH = '/***_xml'
# CHUNK_SIZE = 1024 ** 2
# 
# 
# # ?
# 
# def speech_to_text(filename=None, bytes=None, request_id=uuid.uuid4().hex, topic='notes', lang='ru-RU',
#                    key=** * _API_KEY):
#     if filename:
#         with open(filename, 'br') as file:
#             bytes = file.read()
#     if not bytes:
#         raise Exception('Neither file name nor bytes provided.')
# 
#     bytes = convert_to_pcm16b16000r(in_bytes=bytes)
# 
#     url = ** *_PATH + '?uuid=%s&key=%s&topic=%s&lang=%s' % (
#         request_id,
#         key,
#         topic,
#         lang
#     )
#     # метод обработки файла
# 
#     chunks = read_chunks(CHUNK_SIZE, bytes)
# 
#     connection = httplib2.HTTPConnectionWithTimeout(***_HOST)
#     # подключение к страницы для передачи заголовка
#     connection.connect()
#     connection.putrequest('POST', url)
#     connection.putheader('Transfer-Encoding', 'chunked')
#     connection.putheader('Content-Type', 'audio/x-pcm;bit=16;rate=16000')
#     connection.endheaders()
# 
#     for chunk in chunks:
#         connection.send(('%s\r\n' % hex(len(chunk))[2:]).encode())
#         connection.send(chunk)
#         connection.send('\r\n'.encode())
# 
#     connection.send('0\r\n\r\n'.encode())
#     response = connection.getresponse()
#     # отправка и получение ответа
# 
#     if response.code == 200:
#         response_text = response.read()
#         xml = XmlElementTree.fromstring(response_text)
#         # ?
#         if int(xml.attrib['success']) == 1:
#             max_confidence = - float("inf")
#             text = ''
# 
#             for child in xml:
#                 if float(child.attrib['confidence']) > max_confidence:
#                     text = child.text
#                     max_confidence = float(child.attrib['confidence'])
# 
#             if max_confidence != - float("inf"):
#                 return text
#             else:
# 
#                 raise SpeechException('No text found.\n\nResponse:\n%s' % (response_text))
#         else:
#             raise SpeechException('No text found.\n\nResponse:\n%s' % (response_text))
#     else:
#         raise SpeechException('Unknown error.\nCode: %s\n\n%s' % (response.code, response.read()))
# 
# 
# сlass
# SpeechException(Exception):
#     pass