Getting nameerror in python

Question

I have the following function, I want to concat the 2 strings, What wrong am I doing here?

commands = ["abcd","123"]

def configure_dev(self, steps):
    func_name = self.id + ':configure dev'

    global conf_cmd
    for key in commands:
        conf_cmd += key + '\n'
    print(conf_cmd)

Getting the following error:

conf_cmd += key + '\n'

After running it, I get this error: NameError: name 'conf_cmd' is not defined

Where have you defined conf_cmd? global does not create a new variable. — Bhargav Rao
– Bhargav Rao, Commented Jul 15, 2016 at 18:44

Jongware · Accepted Answer · 2016-07-15 19:55:11Z

1

I added your code with your critical issue resolved.

commands = ["abcd","123"]
def configure_dev(self, steps):
  func_name = self.id + ':configure dev'
  global conf_cmd = ''  //  <-- ''
  for key in commands:
    conf_cmd+=key+'\n'
  print(conf_cmd)

edited Jul 15, 2016 at 19:55

Jongware

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answered Jul 15, 2016 at 18:48

Fallenreaper

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2 Comments

0xdead Over a year ago

Keep in mind that every call to configure_dev will empty the string.

Fallenreaper Over a year ago

true. Im not sure what his expectation was, but under the expectation of his coding, each time that function was called, he was planning to reinitialize it. Or at least that is what i picked up from their code.

0xdead · Accepted Answer · 2016-07-15 18:47:38Z

1

All you need to do is to add: conf_cmd = ''

just after commands = ["abcd","123"]

Why? global conf_cmd Does not create new string, it just means you can access the global variable.

answered Jul 15, 2016 at 18:47

0xdead

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