Error in Example - Build with Python

post by alireza.pirgazi on Feb 17, 2022

Run python3 example.py then this Error

┌──(venv)─(scalper㉿kali)-[~/Desktop/auction-demo]
└─$ python3 example.py                                            1 ⨯
Generating temporary accounts...
Traceback (most recent call last):
  File "/usr/lib/python3.9/urllib/request.py", line 1346, in do_open
    h.request(req.get_method(), req.selector, req.data, headers,
  File "/usr/lib/python3.9/http/client.py", line 1285, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/usr/lib/python3.9/http/client.py", line 1331, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/usr/lib/python3.9/http/client.py", line 1280, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/usr/lib/python3.9/http/client.py", line 1040, in send_output
    self.send(msg)
  File "/usr/lib/python3.9/http/client.py", line 980, in send
    self.connect()
  File "/usr/lib/python3.9/http/client.py", line 946, in connect
    self.sock = self._create_connection(
  File "/usr/lib/python3.9/socket.py", line 844, in create_connection
    raise err
  File "/usr/lib/python3.9/socket.py", line 832, in create_connection
    sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/scalper/Desktop/auction-demo/example.py", line 122, in <module>
    simple_auction()
  File "/home/scalper/Desktop/auction-demo/example.py", line 23, in simple_auction
    creator = getTemporaryAccount(client)
  File "/home/scalper/Desktop/auction-demo/auction/testing/resources.py", line 48, in getTemporaryAccount
    genesisAccounts = getGenesisAccounts()
  File "/home/scalper/Desktop/auction-demo/auction/testing/setup.py", line 36, in getGenesisAccounts
    wallets = kmd.list_wallets()
  File "/home/scalper/Desktop/auction-demo/venv/lib/python3.9/site-packages/algosdk/kmd.py", line 88, in list_wallets
    res = self.kmd_request("GET", req)
  File "/home/scalper/Desktop/auction-demo/venv/lib/python3.9/site-packages/algosdk/kmd.py", line 61, in kmd_request
    resp = urlopen(req)
  File "/usr/lib/python3.9/urllib/request.py", line 214, in urlopen
    return opener.open(url, data, timeout)
  File "/usr/lib/python3.9/urllib/request.py", line 517, in open
    response = self._open(req, data)
  File "/usr/lib/python3.9/urllib/request.py", line 534, in _open
    result = self._call_chain(self.handle_open, protocol, protocol +
  File "/usr/lib/python3.9/urllib/request.py", line 494, in _call_chain
    result = func(*args)
  File "/usr/lib/python3.9/http/client.py", line 1375, in http_open
    return self.do_open(http.client.HTTPConnection, req)
  File "/usr/lib/python3.9/http/client.py", line 1349, in do_open
    raise URLError(err)
urllib.error.URLError: <urlopen error [Errno 111] Connection refused>

post by fabrice on Feb 17, 2022

Most likely the URL you gave to create the algod client is incorrect.

Can you show your code? (replace any secret token/key with “**”)

How do you connect to the network? There are 3 options explained there: Set up your development environment - Algorand Developer Portal

post by alireza.pirgazi on Feb 17, 2022

The code is the same as the tutorial example

https://developer.algorand.org/docs/get-started/dapps/pyteal/

post by fabrice on Feb 17, 2022

In that case, most likely sandbox is not running properly.

Have you successfully run the step Build with Python - Algorand Developer Portal?

post by alireza.pirgazi on Feb 17, 2022

The output of the test is as follows

What do you think is the problem?

┌──(scalper㉿kali)-[~/Desktop/sandbox]
└─$ ./sandbox up testnet

Starting sandbox for: testnet
see sandbox.log for detailed progress, or use -v.
* started!

algod version

┌──(scalper㉿kali)-[~/Desktop/sandbox]
└─$ ./sandbox test                                                1 ⨯

Test command forwarding...
~$ docker exec -it algod uname -a

post by fabrice on Feb 17, 2022

There is a bug somewhere, the output should contain much more information.

Please provide sandbox.log or run ./sandbox up testnet -v. I've also opened an issue Improve output in case of error · Issue #103 · algorand/sandbox · GitHub that you can upvote to improve error handling.

post by alireza.pirgazi on Feb 17, 2022

$ ./sandbox log

sandbox commands:
  up    [config]  -> start the sandbox environment.
  down            -> tear down the sandbox environment.
  reset           -> reset the containers to their initial state.
  clean           -> stops and deletes containers and data directory.
  test            -> runs some tests to demonstrate usage.
  enter [algod||indexer||indexer-db]
                  -> enter the sandbox container.
  version         -> print binary versions.
  copyTo <file>   -> copy <file> into the algod. Useful for offline transactions, offline LogicSigs & TEAL work.
  copyFrom <file> -> copy <file> from the algod. Useful for offline transactions, offline LogicSigs & TEAL work.

algorand commands:
  logs        -> stream algorand logs with the carpenter utility.
  status      -> get node status.
  goal (args) -> run goal command like 'goal node status'.

special flags for 'up' command:
  -v|--verbose           -> display verbose output when starting standbox.
  -s|--skip-fast-catchup -> skip catchup when connecting to real network.
  -i|--interactive       -> start docker-compose in interactive mode.

post by fabrice on Feb 18, 2022

Hello my dear friend

Changing the operating system to Ubuntu did not solve the problem

Solved by changing the operating system DNS.

Grateful

┌──(venv)─(scalper㉿kali)-[~/Desktop/auction-demo]
└─$ python3 example.py
Generating temporary accounts...
Alice (seller account): GQWSLYREYFSSQIC5TAX3OW6NPTMDATJTX6HOWW6PODKD33PD3QYNLP3AWU
Bob (auction creator account): EA2ZHTOPHI7ACOTGQNAVE2O4V6HQF5OGQMG3ZMHQTCO2MO2SMXAFJGTNZI
Carla (bidder account) GLMXXTP6Y2MWXQZQ2DCUHWJA4PV4AMA7EVOGCO3NZDNRW37I2FXS22MOCI

Alice is generating an example NFT...
The NFT ID is 17
Alice's balances: {0: 99999000, 17: 1}

Bob is creating an auction that lasts 30 seconds to auction off the NFT...
Done. The auction app ID is 18 and the escrow account is TYLKPGKW3Q2XA3WRE4VIL3SAJXBC2OIK37RMBO52Q6K4MAPMXKVXLNFCM

Alice is setting up and funding NFT auction...
Done

Alice's balances: {0: 99998000, 17: 0}
Auction escrow balances: {0: 202000, 17: 1}

Carla wants to bid on NFT, her balances: {0: 100000000}
Carla is placing bid for 1000000 microAlgos
Carla is opting into NFT with ID 17
Done

Waiting 17 seconds for the auction to finish

Alice is closing out the auction

The auction escrow now holds the following: {0: 0}
Alice's balances after auction:  {0: 101197000, 17: 0}  Algos
Carla's balances after auction:  {0: 98997000, 17: 1}  Algos

post by fabrice on Feb 20, 2022

Good to know it’s fixed.

Indeed, limited ISP DNS may cause issues.