[backtrader source code analysis 46] cerebro Py code comments (boring, one of the core backtrader codes, recommended for reading, comments for reference only)

cerebro Class . Write here , except analyzer and indicator Some related documents have no comments , Basically, the code annotation is almost finished . It's done analyzer and indicator After comments for , The following will be based on backtrader Use 、 Five or six times of code reading experience , Sort out and summarize backtrader Relevant framework , Plan to use 20 About the length of the lecture .

from __future__ import (absolute_import, division, print_function,
                        unicode_literals)

import datetime
import collections
import itertools
import multiprocessing

import backtrader as bt
from