python2.7代码在python3.5环境下TypeError: a bytes-like object is required, not 'str'问题

这两天从Github上下载2.7版本程序在3.5版本运行时TypeError: a bytes-like object is required, not 'str'这个错误花了我一天的时间来改找原因，下面将方法总结如下，一句话改动，屡试不爽：

报错如下：

Traceback (most recent call last):
  File "cf_gan.py", line 226, in
    main()
  File "cf_gan.py", line 144, in main
    param = pickle.load(open(workdir + "model_dns_ori.pkl"))
TypeError: a bytes-like object is required, not 'str'

博文：https://blog.csdn.net/Kerrwy/article/details/79457028给了很有用的信息，文章如下：

pickle.load()

当pickle.load(file)时，会直接报错：TypeError: file must have ‘read’ and ‘readline’ attributes；
当使用下面的这个代码运行时，

with open(file, 'rb') as f: 
    pickle.load(f)12

会报错UnicodeDecodeError: ‘ascii’ codec can’t decode byte 0x8b in position 6: ordinal not in range(128)。

解决方法1：替换代码中的pickle.load(f)为pickle.load(f, encoding=’bytes’)即可，在python3中需要加入encoding=’bytes’，而python2中不需要。

解决方法2：

with open(file, 'rb') as f: 
    pickle.loads(f.read())

我采用方法1替换代码中的pickle.load(f)为pickle.load(f, encoding=’bytes’)，最初用方法2改时，报错

Traceback (most recent call last):
  File "cf_gan.py", line 240, in
    main()
  File "cf_gan.py", line 156, in main
    param = pickle.load(data_file.read())
TypeError: file must have 'read' and 'readline' attributes

按照方法1将程序param = pickle.load(open(workdir + "model_dns_ori.pkl"))改为：

    with open(workdir + "model_dns_ori.pkl",'rb') as data_file:
        param = pickle.load(data_file,encoding='bytes') 

程序不再报错，此方法简单，比其他百度出来的方法靠谱，屡试不爽