TypeError: 'bytes' object is not callable

[sachinomniquad]

for some of the emails i get below error

Traceback (most recent call last):
File "/usr/local/lib/python3.8/dist-packages/pymilter-1.0.5-py3.8-linux-x86_64.egg/Milter/init.py", line 854, in
milter.set_body_callback(lambda ctx,chunk: ctx.getpriv().body(chunk))
TypeError: 'bytes' object is not callable

[sdgathman]

Does your milter by any chance do something like this:

self.body = some_bytes_object

That would produce exactly the result described. My milters use self.fp and self.body_start.
self.body() is a callback function that you override to get the body bytes.