Python Software Foundation survey finds that a significant number of Python developers are still using Python 2 for data analysis, computer graphics, and devops.
Both. There are many breaking changes that can make your code completely incompatible. Some people won't bother to port their code. Others could be using an obscure or niche library that hasn't been updated for 3 and can't port their code.
Third category, software provided as part of an ancient service contract that nobody is allowed to touch, even though the service partner stopped offering support for this particular software years ago. Ask me how I know
Both. There are many breaking changes that can make your code completely incompatible. Some people won't bother to port their code. Others could be using an obscure or niche library that hasn't been updated for 3 and can't port their code.
Third category, software provided as part of an ancient service contract that nobody is allowed to touch, even though the service partner stopped offering support for this particular software years ago. Ask me how I know
Oof.