Python3 coding differences

https://cv-tricks.com/how-to/developer-guide-to-key-differences-between-python-2-and-3/

• • Print Statement
  • input() function (returns a string in 3.x; under 2.x use raw_input instead)
  • Unicode Literals
  • Exceptions
  • Rounding
  • List comprehension
  • Generators
  • string.replace is not available anymore
  • reload() should be replaced with import importlib; importlib.reload()
  • As of Python version 3.7, dictionaries are ordered. In Python 3.6 and earlier, dictionaries are unordered but insertion ordered.