Unable to type in Python window in ArcMap

[BenjaminGray]

Not exactly sure where this ought to go. I have some trouble with the Python Geoprocessing window in ArcMap. Basically, I am unable to do anything with it, and there's no >>> prompt or anything, and I've never had an issue before. I'm pretty new to ArcMap, and Python in particular. Any assistance would be tremendously appreciated.

[DanPatterson_Retired]

arcmap version?  anything installed/removed recently?  any project or one in particular?

do you still have a folder like....  C:\Python27\ArcGIS10.5..... varying by the version number

Did you try a reinstall of your installation?

Are you the only user on the machine? and if not, do other people have the same problem?

etc

[BenjaminGray]

ArcMap version 10.4. Nothing installed or removed recently, and still have such a folder as described. However, I have not yet tried a reinstall. Probably worth a shot!

[RebeccaStrauch__GISP]

Anytime something strange start happening with the interface, it's always worth trying https://community.esri.com/docs/DOC-2121?sr=search&searchId=d62d3432-8c41-41e3-9e60-23bf81af6f79&sea...‌  ...even before a repair or reinstall.  It fixes a lot of strange behavior.