Oct 3, 2009 · I've been programming in Python for years and only recently realized that there was an actual Python array object that is different from list objects. While the data struct is very similar, arrays limit what type of objects the array can hold.

I would like to know how i can initialize an array (or list), yet to be populated with values, to have a defined size. For example in C: int x[5]; /* declared without adding elements*/ How do I do that in Python?

Is there way to initialize a numpy array of a shape and add to it? I will explain what I need with a list example. If I want to create a list of objects generated in a loop, I can do: a = [] for i...

Dec 7, 2009 · Python doesn't have a built-in array data structure. The closest you get to that are lists.

I'm trying to add items to an array in Python. I run array = {} Then, I try to add something to this array by doing: array.append(valueToBeInserted) There doesn't seem to be an .append method for...

Jul 12, 2011 · I want to define a two-dimensional array without an initialized length like this: Matrix = [][] But this gives an error: IndexError: list index out of range

Jun 20, 2022 · I want to create an empty array and append items to it, one at a time. xs = [] for item in data: xs.append(item) Can I use this list-style notation with NumPy arrays?

I'm beginning python and I'm trying to use a two-dimensional list, that I initially fill up with the same variable in every place. I came up with this: def initialize_twodlist(foo): twod_list ...

Python's lists are lists, not arrays. And in Python you don't declare stuff like you do in C: you define functions and classes (via def and class statements), and assign to variables which, if they don't exist already, are created magically on first assignment.

Mar 8, 2019 · In python, it's possible to create an array of size n with [] * n or even initialize a fixed value for all items with [0] * n. Is it possible to do something similar but initialize the value with 500n?