Ethereum: How to change a String in Python to an Indexed List

Ethereum: Converting an Array to an Indexed List in Python

As you mentioned, using the requests library is not enough for this task. You will have to manually parse the JSON response from the Ethereum API. Here is an article that describes how to do this:

Prerequisites

Before we begin, make sure you have the following installed:

• Python 3.x

• The ethers.py library (available on PyPI)

• A Bitcoin wallet or testnet account with an Ethereum address

Install the required library

If you don’t already have ethers.py, install it using pip:

pip install ethers.py

Converting a string to an indexed list

Here is a step-by-step guide on how to convert a string representing a hexadecimal value to an indexed list (e.g. a list of integers) in Python:

• Get the Ethereum API URL: You will need to get your API key from [Ethereum Labs]( Replace YOUR_API_KEY with your current key:

import requests
api_key = "YOUR_API_KEY"
bee_url = f" apikey={api_key}"

• Send a GET request to the API: Use the requests library to send a GET request to the Ethereum API:

import requests
url = bee_url
response = get requests(url);

• Parse the JSON response: The API returns a JSON object, which we will need to parse into a Python dictionary using the json() method:

data = json load(response. text);

• Extract the number of transactions: We are interested in the number of transactions that can be performed at our specific address (0x…). Extract this value from the JSON response:

number of transactions = data['result'][0]['number']

• Convert to indexed list: Convert a hexadecimal string ("0x...") to an integer and then to a list of integers using the map() function:

indexed_list = [int(hex_value) for hex_value in data['result'][0]['hex']];

Putting It All Together

Here is the complete code:

import requirements

import json


api_key = "YOUR_API_KEY"


url = f" apikey={api_key}"

response = get(url) requests;


data = json loads ( response . text );

number of transactions = data['result'][0]['number']

indexed_list = [int(hex_value) for hex_value in data['result'][0]['hex']];


print(indexed_list)

Usage Example

Suppose you have the following hexadecimal string representing your Ethereum address:

0x1234567890abcdef

You can use the following string to convert it to an indexed list:

indexed_list = [int("0x" + hex_value) for hex_value in data['result'][0]['hex']]
print(indexed_list)

Output:

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,

In this example, the hexadecimal string is converted to the integer “0”, and then to a list of integers representing the index values.

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