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StylusS

stylus@social.afront.org

@stylus@social.afront.org
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  • Math is everywhere.
    StylusS Stylus

    @johncarlosbaez

    One Mayan inscription suggest that the Long Count was the truncation to the last 5 “digits” of an even longer count, and that a Long Count value such as 9.15.13.6.9 was in fact 13.13.13.13.13.13.13.13.9.15.13.6.9 in this Even Longer Count (why 13 everywhere? I don’t know!).

    for some reason this makes me think of p-adic numbers. infinitely repeating 13s on the left side of the date, why not.

    Uncategorized

  • Can someone explain this #Python import behavior
    StylusS Stylus

    @bmispelon

    $ echo 'A = 1; print("A1"); from b import A; print("A2")' > a.py
    $ echo 'print("B1"); from a import A; print("B2"); A += 1' > b.py
    $ python -c 'from a import A; print(A)'
    A1
    B1
    B2
    A2
    2

    I added several prints so that it's possible to tell what order code is executed, and changed import * to import A because I think it improves clarity without changing the behavior.

    • The main program runs
    • It encounters an import of a so it starts executing the content of a.py in a newly created a module
    • It sets A.a=1 via the assignment statement in a.py
    • It encounters an import of b so it starts executing the content of b.py in a newly created b module
    • It sets b.A=1 by from...import
    • It adds 1 to b.A so that b.A is now equal to 2
    • Execution reaches the end of b.py so it returns to a.py
    • a.py sets a.A to 2 by from...import
    • Execution reaches the end of a.py so it returns to the main program.
    • The main program sets __main__.A to 2 by from ...import
    • The value of A is printed (2)
    Uncategorized python
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