Is smtplib pure python or implemented in C?

Question

Is smtplib pure python or implemented in C?

Answer 1

In [32]: import smtplib

In [33]: smtplib
Out[33]: <module 'smtplib' from '/usr/lib/python2.6/smtplib.pyc'>

Therefore, smtplib is written in python.

Answer 2

smtplib itself is implemented in python but socket is based on C, so its means both.

Answer 3

Basically pure Python (as the underlying implementation if you go down far enough is C). You can find the source under the Lib\ directory in your Python root.