I am a beginner looking to write a simple program that takes an input (address) and prints the unspent amount in it.
I copied some code from chapter 4 of Mastering Bitcoin to generate a random keypair, and the last lines Andreas had in the code I copied were:
> # Generate bitcoin address from public key
> print "Bitcoin Address (b58check) is:", bitcoin.pubkey_to_address(public_key)
>
> # Generate compressed bitcoin address from compressed public key
> print "Compressed Bitcoin Address (b58check) is:", \
> bitcoin.pubkey_to_address(hex_compressed_public_key)
I added the following bit at the end that prints the UTXO. It is currently printing "[ ]" because there are no UTXOs because I'm generating a new address, but it at least works when I do this and prints something.
> #Print the UTXO for the given address
> print bitcoin.unspent(bitcoin.pubkey_to_address(public_key))
However, when I type an address instead of the "(bitcoin.pubkey_to_address(public_key))", like so:
> print bitcoin.unspent(16jn6k2FJqwrNLDpbZmmmpf4TCW7uM6LED)
It gives me an error ("SyntaxError: invalid syntax) and points to the "D" at the end of the address. I really want to use this specific bit of code to enable me to enter an address and have the UTXOs returned. (Please note, I just found that address on blockchain.info by clicking addresses until one with unspent coins came up! Also I am a complete novice so please go easy on me!)
Thanks in advance
