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

Ethereum: Converting a string to an indexed list in Python

As you said, using the requests library is not sufficient for this purpose. You will need to manually parse the JSON response from the Ethereum API. Here is an article that explains how to achieve this:

Prerequisites

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

• Python 3.x

• The ethers.py library (available on PyPI)

• A Bitcoin wallet or a testnet account with an Ethereum address

Install the required library

If you don’t have ethers.py yet, 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 actual key:

import requests
api_key = "YOUR_API_KEY"
api_url = f" 000000000000000000000000000000000&to=0x00000000000000000000000000000000000000000000000000000001&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 = api_url
response = requests.get(url)

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

data = json.loads(response.text)

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

transaction_count = data['result'][0]['number']

• Convert to indexed list: Convert the hex 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 requests
import json
api_key = "YOUR_API_KEY"
url = f" 0000000000000000000000000000000000&to=0000000000000000000000000000000000000000000000000000000001&apikey={api_key}"
response = requests.get(url)
data = json.loads(response.text)
transaction_count = data['result'][0]['number']
indexed_list = [int(hex_value) for hex_value in data['result'][0]['hex']]
print(indexed_list)

Example Use Case

Suppose we have the following hex string representing an Ethereum address:

0x1234567890abcdef

You can use this string to convert it to an indexed list like this:

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, 14]

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

best your withdrawals