Duplicate output when op() argument wasn't an object.

[CokeStudios]

import hashlib
op(hashlib)
<module 'hashlib' from 'C:\Users\guojoan\AppData\Local\Programs\Python\Python310\lib\hashlib.py'>
<module 'hashlib' from 'C:\Users\guojoan\AppData\Local\Programs\Python\Python310\lib\hashlib.py'>

a = []
a.append(a)
op(a)
[[ ... ]]
[[...]]

and so on

[gaogaotiantian]

Are you using an REPL? As op returns the object, so REPL will print the returned object, which will result in print the object twice(one by op and another one by an implicit print). This is track in #73 and I probably will figure out a way to detect REPL and change the behavior.

[CokeStudios]

Yeah and I'll close this issue.