To import NumPy into your Python session or script, just use this command ... SymPy operates on symbols the way a numeric calculator or regular Python program works on numbers.

But a newer Cython syntax called pure Python mode lets you write code that’s closer to Python ... syntax you’d use in a conventional Python script can be used in Cython as-is.

Calculator apps and handheld calculators are clunky, but Python's interactive mode easily recalls previous results for ...