How to input an array in python

Python There are many ways to input an array: use the list() function to create a list whose elements are strings separated by spaces in the input. Use the numpy.array() function to create a NumPy array whose elements are space-delimited strings from the input and converted to the specified data type (such as an integer). Use the itertools.chain.from_iterable() function to create a list of newline-delimited strings from the input. Use the ast.literal_eval() function to convert the input string directly into a list whose elements are objects of primitive type. Use the json.loads() function to load the input JSON

How to use Python to input an array

In Python , you can use several methods to input an array:

1. Use the list() function

<code class="python">my_array = list(input("输入数组元素，用空格分隔：").split())</code>

This method creates a list in which each element is A string split from user input.

2. Use the numpy.array() function (requires numpy library)

<code class="python">import numpy as np
my_array = np.array(input("输入数组元素，用空格分隔：").split(), dtype=int)</code>

This method creates a NumPy array in which each element is drawn from the user input Convert the split string to the given data type (integer in this case).

3. Use the itertools.chain.from_iterable() function

<code class="python">from itertools import chain
my_array = list(chain.from_iterable(input("输入数组元素，用换行符分隔：").splitlines()))</code>

This method creates a list where each element is a character split from the user input. string.

4. Use the ast.literal_eval() function

<code class="python">import ast
my_array = ast.literal_eval(input("输入数组，如 [1, 2, 3]："))</code>

This method directly converts the string entered by the user into a list, where each element is of primitive type object.

5. Use the json.loads() function

<code class="python">import json
my_array = json.loads(input("输入数组，如 [\"1\", \"2\", \"3\"]："))</code>

This method converts the JSON string entered by the user into a list, where each element is of string type object.

Choose the most appropriate method based on your specific needs.

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