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How to read a single character from the user?
... from the user input? For instance, they press one key at the terminal and it is returned (sort of like getch() ). I know there's a function in Windows for it, but I'd like something that is cross-platform.
...
What is the id( ) function used for?
...s several questions:
What is the number returned from the function?
It is "an integer (or long integer) which is guaranteed to be unique and constant for this object during its lifetime." (Python Standard Library - Built-in Functions) A unique number. Nothing more, and nothing less. Think of ...
Windows threading: _beginthread vs _beginthreadex vs CreateThread C++
...nes. Once CreateThread() has returned, _beginthread/ex() takes care of additional bookkeeping to make the C runtime library usable & consistent in the new thread.
In C++ you should almost certainly use _beginthreadex() unless you won't be linking to the C runtime library at all (aka MSVCRT*.dl...
C++ compiling on Windows and Linux: ifdef switch [duplicate]
...
this answer is sort of better in that it directly answers the question, instead of just providing a link to some 3rd site which may die one day
– Petr
Mar 6 '14 at 8:32
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How do I determine the size of an object in Python?
...results, but this does not
have to hold true for third-party
extensions as it is implementation
specific.
Only the memory consumption directly attributed to the object is
accounted for, not the memory consumption of objects it refers to.
The default argument allows to define
a value which will be re...
super() raises “TypeError: must be type, not classobj” for new-style class
...
Alright, it's the usual "super() cannot be used with an old-style class".
However, the important point is that the correct test for "is this a new-style instance (i.e. object)?" is
>>> class OldStyle: pass
>>> inst...
Hashing a dictionary?
...
If your dictionary is not nested, you could make a frozenset with the dict's items and use hash():
hash(frozenset(my_dict.items()))
This is much less computationally intensive than generating the JSON string or representation of the dictionary.
UPDATE: Please see the comments below,...
Django: Get list of model fields?
I've defined a User class which (ultimately) inherits from models.Model . I want to get a list of all the fields defined for this model. For example, phone_number = CharField(max_length=20) . Basically, I want to retrieve anything that inherits from the Field class.
...
correct way to define class variables in Python [duplicate]
I noticed that in Python, people initialize their class attributes in two different ways.
2 Answers
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Best way to structure a tkinter application? [closed]
...vocate an object oriented approach. This is the template that I start out with:
# Use Tkinter for python 2, tkinter for python 3
import tkinter as tk
class MainApplication(tk.Frame):
def __init__(self, parent, *args, **kwargs):
tk.Frame.__init__(self, parent, *args, **kwargs)
s...