python運行execjs中出現 'gbk' codec can't decode byte 0x80 in position 41: illegal multibyte

在破解豆瓣的window.__DATA__時，使用python的execjs執行js，會有這個錯誤：

Exception in thread Thread-1:
Traceback (most recent call last):
  File "E:\codes\python\lib\threading.py", line 917, in _bootstrap_inner
    self.run()
  File "E:\codes\python\lib\threading.py", line 865, in run
    self._target(*self._args, **self._kwargs)
  File "E:\codes\python\lib\subprocess.py", line 1238, in _readerthread
    buffer.append(fh.read())
UnicodeDecodeError: 'gbk' codec can't decode byte 0x80 in position 41: illegal multibyte sequence

Traceback (most recent call last):
  File "E:/Python/python_project/decrypt_js/douban.py", line 13, in <module>
    data = ctx.call('decrypt', r)
  File "E:\codes\python\lib\site-packages\execjs\_abstract_runtime_context.py", line 37, in call
    return self._call(name, *args)
  File "E:\codes\python\lib\site-packages\execjs\_external_runtime.py", line 92, in _call
    return self._eval("{identifier}.apply(this, {args})".format(identifier=identifier, args=args))
  File "E:\codes\python\lib\site-packages\execjs\_external_runtime.py", line 78, in _eval
    return self.exec_(code)
  File "E:\codes\python\lib\site-packages\execjs\_abstract_runtime_context.py", line 18, in exec_
    return self._exec_(source)
  File "E:\codes\python\lib\site-packages\execjs\_external_runtime.py", line 87, in _exec_
    output = self._exec_with_pipe(source)
  File "E:\codes\python\lib\site-packages\execjs\_external_runtime.py", line 103, in _exec_with_pipe
    stdoutdata, stderrdata = p.communicate(input=input)
  File "E:\codes\python\lib\subprocess.py", line 939, in communicate
    stdout, stderr = self._communicate(input, endtime, timeout)
  File "E:\codes\python\lib\subprocess.py", line 1288, in _communicate
    stdout = stdout[0]
IndexError: list index out of range

原因是有一個程序在使用TextIOWrapper 類創建對象時默認使用了cp936的編碼，也就是gbk編碼，讀取不了utf-8的字符，
所以我們可以修改下 subprocess.py 文件的默認編碼方式爲utf-8即可

在代碼行656有個初始化，直接修改默認即可，如下

修改完再運行代碼，結果就出來了，沒有報錯.

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