Create 2D list from string with given length and width
How to create 2D list from string with n-rows and 2 cols?
str = "044010010A1A..." list_2d = [['04','40'], ['10','01'], ['0A','1A']]...
Anyone can help?
You can use a list comprehension:
>>> s = '044010010A1A' >>> [[s[i:i+2], s[i+2:i+4]] for i in range(0, len(s), 4)] [['04', '40'], ['10', '01'], ['0A', '1A']]
You can use a list comprehension: >>> s = '044010010A1A' >>> [[s[i:i+2], s[i+2:i+4]] for i in range(0, len(s), 4)] [['04', '40'], ['10', '01'], ['0A', '1A']]. 2D array. Python supports a special "array" from the array module. An integer array is more compact in memory than an integer list. We can create a flattened 2D array. 2D Array. Usage. Sometimes a 2D list is helpful in programs. For a simple or small coordinate system or grid, nested lists can be useful. They are flexible. The syntax is clear.
You can use
from more_itertools import sliced s = '044010010A1A' res = list(sliced(list(sliced(s, 2)), 2)) [['04', '40'], ['10', '01'], ['0A', '1A']]
If you don't want the 3rd party import, you can define
from itertools import count, takewhile def sliced(seq, n): return takewhile(bool, (seq[i: i + n] for i in count(0, n)))
Given a 1D list 'lst' and list of variable lengths 'var_lst', write a Python program to convert the given 1D list to 2D list of given variable lengths. Examples: Input : lst Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Learn more . How do I find the size of a 2D array? [duplicate] Ask Question Asked 9 years, 6 months ago. Active 4 years, 5 months ago. Viewed 78k
You should handle yourself what happens when there are even number of element on your string. Using textwrap saves you the trouble of parsing. It will create equal parts of the string, which in this case is 2
import textwrap list = textwrap.wrap(str,2) temp_list =  for item in list: temp_list.append(item) if(len(temp_list)==2): list_2d.append(temp_list) temp_list = 
Creating 2d Lists. Static Allocation # create a 2d list with fixed values (static allocation) a = [ [ 2, 3, 4 ] , [ 5, 6, 7 ] ] print a; Dynamic (Variable-Length) Allocation Getting 2d List Dimensions # Create This finds the maximum length of the string Given a string, the task is to pad string up to given specific length with whitespaces. Let’s discuss few methods to solve the given task. Method #1: Using ljust() filter_none. edit close. play_arrow. link brightness_4 code # Python code to demonstrate
first: don't call your string
str. It's already used by python.
import numpy as np [list(l) for l in list(np.reshape(list(S),(int(len(S)/2),2)))]
numpy provides a fast function for reshaping list.
Creating 2d Lists; Getting 2d List Dimensions; Copying and Aliasing 2d Lists create a 2d list with fixed values (static allocation) a = [ [ 2, 3, 4 ] , [ 5, 6, This finds the maximum length of the string # representation of any item in the 2d list def Get two integers from the user, then create a two-dimensional array where the two dimensions have the sizes given by those numbers, and which can be accessed in the most natural way possible. Write some element of that array, and then output that element. Finally destroy the array if not done by the language itself. 10.1 Applesoft BASIC.
If you would like to use numpy arrays instead of 2D lists, you can do the following trick:
>>> s = '044010010A1A' >>> np.array([s]).view('<U2').reshape(-1, 2) array([['04', '40'], ['10', '01'], ['0A', '1A']], dtype='<U2')
This is much faster then using list comprehension proposed by Eugene Yarmash or itertools by jpp, and
using numpy arrays instead of 2D lists has in general more advantages.
However, if needed, you can convert a numpy array to list by the
However, the data associated with certain systems (a digital image, a board game, etc.) A two-dimensional list is really nothing more than an list of lists (a (lettuce, tomatoes, salad dressing, steak, mashed potatoes, string beans, cake, ice cream, Example: 2D List def setup(): size(200,200) nRows = height nCols = width Create an empty list in python with certain size. Ask Question Asked 8 years ago. Active 8 days ago. Viewed 1.3m times 537. 124. I want to create an empty list (or whatever is the best way) that can hold 10 elements. After that I want to assign values in
This tutorial goes over 2d lists and multidimensional arrays in general. Including In the previous lesson, Strings in Python - Split, we learned how to use the split() string method. Today's Generating an empty 2D array of a given size: e.g. imagine that we want to store the length, width, and height of five cell phones. Given a string of length L. The task is to convert the string into a grid. Examples: Input : str = "haveaniceday" Output : have anic eday Explanation: k is the separator. If k is 4 then the output will be "have anic eday" Input :str = "geeksforgeeks" Output : geek sfor geek s
Create an empty Numpy Array of given length or shape & data type in Python 1D,2D or 3D Numpy array and of different data types like int or string etc. Let's see how to create 2D and 3D empty Numpy array using empty() function, Create a Numpy Array from list, tuple or list of lists using numpy.array() Prerequisite: List in Python. As we know Array is a collection of items stored at contiguous memory locations. In Python, List (Dynamic Array) can be treated as Array. In this article, we will learn how to initialize an empty array of some given size. Let’s see different Pythonic ways to do this task.
An array of more than one dimension is known as a multi-dimensional array. Similar to the one-dimensional array, the length of the two-dimensional array is also fixed. essential data structure like an array and linked list, then I suggest you to first In the first example, we have created and initialized String array using an Length, width, height, and depth are nouns are derived from the adjectives long, wide, high, and deep, and follow a common English pattern that involves a vowel change (often to a shorter vowel) and the addition of th. (The lone t in height is modern. Obsolete forms include heighth and highth, and it is still common to hear people pronounce it