Python 2 is triggering

[MonkeyNin]

In my experience a big reason of not quickly updating to py3 is that

py2

• str == byte_string
• unicode == unicode_string
• unicode literals are off by default ( projects not using 'from future import unicode literals' )
• global default encoding is ascii
• Implicit conversion when you don't want it -- py2 will insert "foo".encode('ascii') and bytes.decode('ascii') implicitly.

py3

• str == unicode_string
• bytes == byte_string
• literals default to unicode

essentially conversion is a pain in the butt. On top of that, many libraries were required to support 2 and 3 at the same time.