convert array of int to array of chars - python

Use map function to convert a list of integres to list of strings , how ever map function retruns a map object so I used a list function to convert that to a list and assgin to first list (alpha) :

alpha = [1, 2, 3, 4]
alpha = list(map(str, alpha))
alpha #['1', '2', '3', '4']

Here is my code:

import numpy as np
aa = ['1', '2', '3', '3', '4']
aa = np.array(aa).astype('str').tolist()
aa #['1', '2', '3', '4']

But you need to modify elements which you can do as suggested by Arman or if you want to modify your code then:

for indx, i in enumerate(alpha):
   alpha[indx] = str(i)

Suggestion : 2

Last Updated : 05 Jul, 2021,GATE CS 2021 Syllabus

1, 2, 3, 4, 9,

Suggestion : 3

This method uses extend() to convert string to a character array. It initializes an empty array to store the characters. extends() uses for loop to iterate over the string and adds elements one by one to the empty string. The empty string prints a list of characters.,This example uses for loop to convert each character of string into comma-separated values. It prints a list of characters separated by a comma. It encloses the for loop within square brackets [] and splits the characters of the given string into a list of characters.,In this article, we learned to convert a given string into a character array. We used three approaches for the conversion such as for loop, list() and extend(). We used custom codes as well to understand the working.,This example uses list keyword to convert a string to a character array. We can use a list to convert to any iterable. This is known as typecasting of one type to another. Python built-in list() function typecast the given string into a list. list() takes the string as an argument and internally changes it to an array.

The string is a type in python language just like integer, float, boolean, etc. Data surrounded by single quotes or double quotes are said to be a string. A string is also known as a sequence of characters.

string1 = "apple"
string2 = "Preeti125"
string3 = "12345"
string4 = "pre@12"

This example uses for loop to convert each character of string into comma-separated values. It prints a list of characters separated by a comma. It encloses the for loop within square brackets [] and splits the characters of the given string into a list of characters.

string = "studytonight"

to_array = [char
   for char in string
]

print(to_array)

This example uses list keyword to convert a string to a character array. We can use a list to convert to any iterable. This is known as typecasting of one type to another. Python built-in list() function typecast the given string into a list. list() takes the string as an argument and internally changes it to an array.

string = "studytonight"

to_array = list(string)

print(to_array)

Suggestion : 4

Changed in version 1.9.0: Casting from numeric to string types in ‘safe’ casting mode requires that the string dtype length is long enough to store the max integer/float value converted.,Typecode or data-type to which the array is cast.,By default, astype always returns a newly allocated array. If this is set to false, and the dtype, order, and subok requirements are satisfied, the input array is returned instead of a copy.,Unless copy is False and the other conditions for returning the input array are satisfied (see description for copy input parameter), arr_t is a new array of the same shape as the input array, with dtype, order given by dtype, order.

>>> x = np.array([1, 2, 2.5]) >>>
   x
array([1., 2., 2.5])

>>> x.astype(int)
array([1, 2, 2])

Suggestion : 5

Class Starts on 29th October,2022,Class Starts on 3rd September,2022

Declaration of a char array can be done by using square brackets:

char[] JavaCharArray;

The square brackets can be placed at the end as well.

char JavaCharArray[];

A char array can be initialized by conferring to it a default size.

char[] JavaCharArray = new char[4];

To iterate through every value present in the array, we make use of for loop.

char[] JavaCharArray = {
   'r',
   's',
   't',
   'u',
   'v'
};
for (char c: JavaCharArray) {
   System.out.println(c);
}

We can also implement the following method:

char[] JavaCharArray = {
   'r',
   's',
   't',
   'u',
   'v'
};
for (int i = 0; i < JavaCharArray.length; i++) {
   System.out.println(JavaCharArray[i]);
}