Feb 26, 2017 · You don’t really declare variables in Python*; you just assign to them, which creates them if necessary. (* except for with type annotations, and those still aren’t declarations.)

Sep 13, 2015 · There's an easy and visually appealing way to make a dictionary d = dict(one=1, two=2) but if your keys are NOT valid Python identifiers, you are forced to use much less simple looking syntax.

Dec 7, 2009 · It should not be so hard. I mean in C, int a[10]; is all you need. How to create an array of all zeros for a random size. I know the zeros() function in NumPy but there must be an easy way built...

Python supports a "bignum" integer type which can work with arbitrarily large numbers. In Python 2.5+, this type is called long and is separate from the int type, but the interpreter will automatically use whichever is more appropriate. In Python 3.0+, long has been renamed int and the old int type has been dropped completely.

Apr 9, 2011 · So, class Integer(int) should be used in order to Python allows you to use the custom variable for the same things the standard int is used. Based on juanchopanza 's answer, a modification is made to create a custom class inherited from int by using the __new__ method instead of the __init__ method.

Sep 16, 2017 · How to declare global empty integer? I have simple code but i don't know how to declare a variable before def. In java I can do just that: public int a; but how to do it in python? Without this, the

I am really new to Python and found this snippet online that I've modified, right now I have it printing x * y but I want to be able to return it as a int value so I can use it again later in the script. I'm using Python 2.7.6. def show_xy(event): xm, ym = event.x, event.y x3 = xm * ym print x3 root = tk.Tk() frame = tk.Frame(root, bg = 'yellow',

Mar 20, 2009 · Is it possible to declare a variable in Python, like so?: var so that it initialized to None? It seems like Python allows this, but as soon as you access it, it crashes. Is this possible? If not, ...

Sep 30, 2011 · How do I represent minimum and maximum values for integers in Python? In Java, we have Integer.MIN_VALUE and Integer.MAX_VALUE. See also: What is the maximum float in Python?.

Python is a strongly-typed dynamic language, which associates types with values, not names. If you want to force callers to provide data of specific types the only way you can do so is by adding explicit checks inside your function.