Python any version - slow interactive startup and exit

[Tatsh (Andrew Udvare)]

I have a strange issue where the Python interactive prompt (>>>) takes seconds to display and after using ^D to exit, it takes seconds to exit the process.

I am installing Python without any modifications (not compiled by me):

port install python35

I tried a clean environment and also unset PYTHONSTARTUP to ensure it wasn't this file. The problem persists.

Please let me know what other information I should provide.

[ryandesign (Ryan Carsten Schmidt)]

OS version? Python modules installed?

I'm unable to reproduce this on Sierra.

[Tatsh (Andrew Udvare)]

I figured out the issue by checking python output while it waited and using ^C. The exception traceback showed a call to readline.read_history_file(). I emptied my history file and everything is fine now. A large history file is the cause. To avoid this issue with a huge history file, python -S, and this may have to do with this in my ~/.inputrc:

# Use the text that has already been typed as the prefix for searching through
# commands (i.e. more intelligent Up/Down behavior)
"\e[B": history-search-forward
"\e[A": history-search-backward

Traceback (most recent call last):
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site.py", line 410, in register_readline
    readline.read_history_file(history)

Sorry for bothering.

[ryandesign (Ryan Carsten Schmidt)]

Ok. Sounds like not a MacPorts-specific problem, in any case.