PaddleDetection训练流程

``2021SC@SDUSC
本周分析

#train.py
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

import os, sys
# add python path of PadleDetection to sys.path
parent_path = os.path.abspath(os.path.join(__file__, *(['..'] * 2)))
if parent_path not in sys.path:
    sys.path.append(parent_path)

# ignore numba warning
import warnings
warnings.filterwarnings('ignore')
import random
import datetime
import time
import numpy as np

import paddle
from paddle.distributed import ParallelEnv

from ppdet.core.workspace import load_config, merge_config, create
from ppdet.utils.checkpoint import load_weight, load_pretrain_weight, save_model

import ppdet.utils.cli as cli
import ppdet.utils.check as check
import ppdet.utils.stats as stats
from ppdet.utils.logger import setup_logger
logger = setup_logger('train')

#运行配置参数解析函数
def parse_args():
    parser = cli.ArgsParser()
    parser.ad