“exit”
✈️: Use exit() or Ctrl-D (I.e. EOF) to exit
this post was submitted on 11 Dec 2023
1166 points (98.9% liked)
Programmer Humor
32415 readers
585 users here now
Post funny things about programming here! (Or just rant about your favourite programming language.)
Rules:
- Posts must be relevant to programming, programmers, or computer science.
- No NSFW content.
- Jokes must be in good taste. No hate speech, bigotry, etc.
founded 5 years ago
MODERATORS
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.
If you have a variable called exit you've overwritten the function in that scope, and won't be able to execute it.
e.g.
>>> exit=1
>>> exit()
Traceback (most recent call last):
File "", line 1, in
TypeError: 'int' object is not callable
>>>
Reminds me of setting pi = 3 in my friends matlab subroutines in school.
wow it does do that. cool
Guessing at what the programmer wants instead of implementing consistent behaviour is what Javascript does. Do you want Python to become Javascript?
Just once I want '1' + '2' to equal '3'. Is that so much to ask?
You want to remove the string concatenation operator? Cause that'll do it
I think every language needs a please operator, which acts to enforce human expectation of a statement:
'1' + '1' ## evaluates to '11'
please '1' + '1' ## evaluates to '2'
I kinda like that
Yes. Yes it is.
This is the code (Github link):
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.
Because python has strong opinions
import gravity; gravity = None
edit: of course there is an xkcd: https://xkcd.com/353/.
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
The Python REPL is fucking good.
I see you've never used a Lisp REPL before.
No, it's not: https://github.com/prompt-toolkit/ptpython.
That's giving me a 404, captain
Not to me
You can search it yourself. The PYPI package is ptpython.
https://github.com/prompt-toolkit/ptpython
the dot at the end of your link breaks it
On Sync it works fine. Moreover, it should work on other clients too. You better open a ticket.
