Programming with Python: Time to upgrade to fancy ANSI

A screen showing code written in Python, with purple light reflecting off the surface
(Image credit: Bigstock)

During the darkest days of lockdown I kept myself amused by practising jazz guitar chords and writing Python programs. I write a lot of small, off-the-cuff programs, for everything from updating phone codes or solving maths puzzles, to playing with simulations to do with Games Theory. Python is just the last of a long list of languages I’ve used – Basic, Forth, Pascal, Lisp and Ruby are a handful of others – but the one I remember with most affection is Turbo Pascal.

My programmes are so small and ad hoc that it’s never worth investing too much time writing graphical user interfaces (GUIs), so Windows was a nuisance rather than a liberation. Although I played with Visual Basic and Delphi for several years, eventually both metastasised into such baggy monsters that I dumped them. I wrote myself a little toolkit in Turbo Pascal 5 that created simple windows, menus and pick-box widgets from ASCII characters, quite good enough. I shared my code in Byte and am proud to say I saw it on screens in more than one science lab where they had similar minimalist requirements.

Now I use QPython 3.6 on Android, which has no native ability for colour or cursor control, just scrolling teletype output. There are plenty of add-on graphics libraries such as Kivy, all way more than I need, and there’s a simple interface to Android dialogues and media components called SL4A that I occasionally use but it’s still not what I had with Turbo.

The impulse to recreate my Turbo widgets was finally triggered by, of all things, Wordle. I enjoy playing Josh Wardle’s clever and elegant little puzzle (almost as much as I deplore posting screenshots on Facebook or bragging about stats). It’s just difficult enough to maintain an interest, but still simple enough to pose real questions over strategy, which is exactly what I love in a game. I never actually cheat but I do use tools that some purists might consider cheating, namely a mobile version of the Oxford Dictionary with wildcard search and an anagram solver; once I have three or four letters these will finish the job in a couple of minutes.

Getting those three of four letters soon enough is what my Python programme does, searching for effective first guesses using the known frequency distribution of letters in English at each position in a five-letter word: it outputs delightful combinations such as AUDIT SNORE CLAMP and CAMEO UNITS GRIND WHELK. I discovered that my old buddy David Tebbutt, one of the founding editors of Personal Computer World, is also fond of Wordle and it was he who sent me the letter frequencies list in a fine example of nerd-aid. He also has access to Wordle’s own internal word list, but in a fit of hubristic rectitude I decided that was a step too far for me.

My Python Wordle Helper program’s scrolling teletype interface became a real bore, and while looking up how to write a clear-screen command using OS calls I discovered how to issue ANSI codes from Python, and hence how to do a 256-colour character-based terminal better than Turbo’s. QPython can in theory access the Linux library, but that refuses to work for me and in any case is pretty horrible. I set to and have now written a widget set that does everything I want, enabling single lines of code to invoke a box, a window, pick list, input box, progress bar, table or bar chart.

I doubt that my new widgets will prove as popular with nerds in science labs as those Turbo originals were; those hark back to when IBM-compatible PCs running DOS were still ubiquitous in technical and process control contexts. I know that there are still far too many public institutions such as hospitals and libraries that retain such dinosaurs, but they will at least be running Windows XP.

Of course, anyone under 70 is using a smartphone instead of a computer anyway, and an ANSI terminal on a smartphone screen is about as welcome as a turd on a sushi. So I’ll keep my little ANSI world to myself, going back and rewiring some of my old programmes using the new interface. My 5-Card Drawer and 5-Card Stud Poker games actually look rather splendid.