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Author Prudent
Recipients Prudent, epaine, ned.deily, ronaldoussoren
Date 2020-08-18.10:33:30
SpamBayes Score -1.0
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Message-id <1597746810.31.0.861093744693.issue41574@roundup.psfhosted.org>
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Content 
The versions of Python, Tcl/Tk and MacOS I used are 3.8.5, 8.5.9 and the newest Catalina 10.15.6, respectively. 

Your words give me a hint about the version of Tcl/Tk. So I checked it. The version I used seems too old, the newest version for it is 8.6. In my thoughts, I always thought those embedded packages could be automatically upgraded after I re-installed a newer python. However, it seems the packages are not be updated as expected.
History
Date User Action Args
2020-08-18 10:33:30Prudentsetrecipients: + Prudent, ronaldoussoren, ned.deily, epaine
2020-08-18 10:33:30Prudentsetmessageid: <1597746810.31.0.861093744693.issue41574@roundup.psfhosted.org>
2020-08-18 10:33:30Prudentlinkissue41574 messages
2020-08-18 10:33:30Prudentcreate