class Quitter(object):
def __init__(self, name, eof):
self.name = name
self.eof = eof
def __repr__(self):
return 'Use %s() or %s to exit' % (self.name, self.eof)
def __call__(self, code=None):
# Shells like IDLE catch the SystemExit, but listen when their
# stdin wrapper is closed.
try:
sys.stdin.close()
except:
pass
raise SystemExit(code)
What happens is that the python repl calls __repr__ automatically on each variable/statement that you type into the repl (except assignments e.g. x = 1).
But this basically only happens in the repl. So "executing" only exit wouldn't work in a python script as it is not calling __repr__ automatically, so better you learn how to do it right than using just exit in your python scripts and scratching your head why it works in the repl but not in your code.
Incidentally, for anyone who hasn't typed 'import antigravity' into an interactive Python terminal...you should - as Dr Seuss says, "These things are fun, and fun is good."
I love how it contains exactly one function: from antigravity import geohash
Hell, this is the entire antigravity library:
import webbrowser
import hashlib
webbrowser.open("https://xkcd.com/353/")
def geohash(latitude, longitude, datedow):
'''Compute geohash() using the Munroe algorithm.
>>> geohash(37.421542, -122.085589, b'2005-05-26-10458.68')
37.857713 -122.544543
'''
# https://xkcd.com/426/
h = hashlib.md5(datedow, usedforsecurity=False).hexdigest()
p, q = [('%f' % float.fromhex('0.' + x)) for x in (h[:16], h[16:32])]
print('%d%s %d%s' % (latitude, p[1:], longitude, q[1:]))
He literally gets a 32-bit hash, uses the first half of it as the latitude decimal, and the second half of it as the longitude decimal,
NO WAY
You now start flying away
And so does everything else, including all the AIR
What's the name of the Island, Java?
Snake island
See it's funny because we name things after other things
“exit”
✈️: Use exit() or Ctrl-D (I.e. EOF) to exit
I mean if they can see that we type exit and show us this message, why could they not just start the exiting when we type exit?
Because exit might be a variable you use to determine if you should exit. exit() is a function that actually does the exiting.
It’s the difference between pointing at a jogger and saying “run” and actually running after them.
Guessing at what the programmer wants instead of implementing consistent behaviour is what Javascript does. Do you want Python to become Javascript?
This is the code (Github link):
What happens is that the python repl calls
__repr__
automatically on each variable/statement that you type into the repl (except assignments e.g.x = 1
). But this basically only happens in the repl. So "executing" onlyexit
wouldn't work in a python script as it is not calling__repr__
automatically, so better you learn how to do it right than using justexit
in your python scripts and scratching your head why it works in the repl but not in your code.Because python has strong opinions