Is this Python's edu-sig or Monty Python's philosophers club? ;-) ;-) ;-)
Anyone on this list could probably do the following in less than one minute...
Run the following program, showing how left() results in a proper turn left
>>> from turtle import *
>>> forward(40)
>>> left(90)
>>> forward(40)
Now, close the interpreter and run it again, this time with the following
>>> from turtle import *
>>> setworldcoordinates(-100, 100, 100, -100)
>>> forward(40)
>>> left(90)
>>> forward(40)
See how left() no longer correspond to a left() turn for the turtle?
André
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For those reading this on a device that does not have Python installed,
below, I show an ascii-simulated representation of
forward(100)
right(90)
forward(100)
when the turtle is oriented facing left initially, starting at the position labeled by O and ending at X
(example chosen because it is the easiest for me to draw, regardless of whether a proportional font is used or not for this email)
X
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---------------O
In the current implementation, with a particular choice for user-defined coordinates , the same instructions might yield the following
----------------O
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X
i.e. a right() instruction would result in a left turn, and vice-versa.