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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.pylibrary (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_KEY
with your actual key:
"python
Import Requests
api_key = "YOUR_API_KEY"
api_url = f" Requests
url = api_url
response = requests.get(url)
json()
Parsing the JSON response
: The API returns a JSON object, which we will need to parse into a Python dictionary using themethod:
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']
"0x..."
Convert to indexed list: Convert the hex string () 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.
