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

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Ethereum: Converting a string to an indexed list in Python

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

Prerequisites

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

  • Python 3.x
  • ethers.py library (available on PyPI)
  • 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 need to get your API key from [Ethereum Labs]( ReplaceYOUR_API_KEYwith your actual key:

"python

Import Requests

api_key = "YOUR_API_KEY"

api_url = f" Requests

url = api_url

response = requests.get(url)


  • Parsing the JSON response

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

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

python

data = json.loads(response.text)


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

python

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


  • Convert to indexed list: Convert the hex string (
    "0x...") to an integer, then convert it to a list of integers using themap()function:

python

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


Putting it all together

Here's the full code:

python

Import Queries

Import json

api_key = "YOUR_API_KEY"

url = f" Case**

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

0x1234567890abcdef

You can use this string and 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, 14]

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

ETHEREUM TRANSACTION

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