# Persisting an Instance of an Object that Talks to Devices

**URL:** <https://forum.inductiveautomation.com/t/persisting-an-instance-of-an-object-that-talks-to-devices/20608>\
**Category:** Ignition\
**Tags:** python, ignition79, scripting\
**Created:** [November 7, 2018, 1:37am UTC](https://forum.inductiveautomation.com/t/persisting-an-instance-of-an-object-that-talks-to-devices/20608 "2018-11-07T01:37:06Z")\
**Posts on this page:** 1\
**Showing post:** 15

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**Author:** ![cmaynes](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/cmaynes/32/6852_2.png) [@cmaynes](https://forum.inductiveautomation.com/u/cmaynes)\
**Post date:** [November 7, 2018, 7:46pm UTC](https://forum.inductiveautomation.com/t/persisting-an-instance-of-an-object-that-talks-to-devices/20608/15 "2018-11-07T19:46:06Z")

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PyVisa has its own internal implementation of VISA, so that you don’t need any external driver. PyVisa is completely self-contained and has a very simple interface, which is why I want to use it.

Moved to [new thread](http://forum.inductiveautomation.com/t/how-to-use-pyvisa-or-maybe-sockets-in-ignition-to-talk-to-visa-scpi-device/20634/3) for PyVisa / VISA communication.

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