goes through a text channel's chat log and writes it to a file

savePastDiscordChat.py

import discord
import asyncio

client = discord.Client()

@client.event
async def on_ready():
    print('Logged in as')
    print(client.user.name)
    print(client.user.id)
    print('------')

@client.event
async def on_message(message):
    if message.content.startswith('record chat'):
        with open('output.txt', 'a') as the_file:
            async for log in client.logs_from(message.channel, limit=1000000000000000):
                  stringTime = log.timestamp.strftime("%Y-%m-%d %H:%M")
                  try:
                      author = log.author
                  except:
                      author = 'invalid'
                  message = str(log.content.encode("utf-8"))[2:-1]

                  template = '[{stringTime}] <{author}> {message}\n'
                  try:
                      the_file.write(template.format(stringTime=stringTime, author=author, message=message))
                  except:
                      author = log.author.discriminator
                      the_file.write(template.format(stringTime=stringTime, author=author, message=message))
                  print(template.format(stringTime=stringTime, author=author, message=message)[:-1])

    elif message.content.startswith('!sleep'):
        await asyncio.sleep(5)
        await client.send_message(message.channel, 'Done sleeping')

client.run('<your token here>', bot=False)

How do i use this? Just as a standalone .py document? Or do i put it somewhere in discord?

From reddit

You can let the program run from your user account. User token can be found in browser console localStorage.token.

Discord would prefer you use a bot account to your user one. As I recall, it's in their Terms of Service.