Sending binary files to bangle.js Storage

That's great, thanks! Only thing to watch out for is that because you're putting the command into a templated string without quoting, some thing can fail - for instance uploading:

print("Hello\nWorld")

Won't have the desired effect, because it'll actually turn into:

f.write(`print("Hello
World")`);

It's easy enough to solve that using the Python JSON library to 'stringify' the command first though: https://docs.python.org/3/library/json.h­tml