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下面是一个有关多进程处理的代码问题：
TypeError: Pickling an Authenticati**tring object is disallowed for security reas**；
报错的位置逆序查找：
（1）
class Authenticati**tring(bytes):
def __reduce__(self):
from .context import get_spawning_popen
if get_spawning_popen() is None:
raise TypeError(
'Pickling an Authenticati**tring object is '
'disallowed for security reas**'
)
return Authenticati**tring, (bytes(self),)
（2）_tls = threading.local()
def get_spawning_popen():
return getattr(_tls, 'spawning_popen',None)
（3）
def getattr(object, name, default=None): # known special case of getattr
"""
getattr(object, name[, default]) -> value
Get a named attribute from an object; getattr(x, 'y') is equivalent to x.y.
When a default argument is given, it is returned when the attribute doesn't
exist; without it, an exception is raised in that case.
"""
pass
（4）错误原因似乎是spawning_popen不是_tls的属性（该属性不存在与_thread._local中）；因此getattr函数返回的是None，导致报错；
（5）求助大神帮助解决此问题，谢谢
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