Puzzle 2 A Slice of π
Python Brain Teasers — by Miki Tebeka (11 / 40)
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π = 355 / 113
print(π)Guess the Output
IMPORTANT
Try to guess what the output is before moving to the next page.
This code will print: 3.1415929203539825
There are two surprising things here: one is that π is a valid identifier, and the second is that 355 / 113 computes to a float.
Let’s start with π (the Greek letter pi). Python 3 changed the default encoding for source files to UTF-8 and allows Unicode identifiers.
This can be fun to write, but in practice it’ll make your coworkers’ lives harder. I can easily type π in the Vim editor that I use; however, most editors and IDEs will require more effort.
One area where I’ve found that Unicode identifiers are helpful is when translating mathematical formulas to code. Apart from that, stick to plain old ASCII.
