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Python Flask Basics Welcome to Flask Create a view

Posted by Robert Martinez
Robert Martinez
3,725 Points

Python flask error: gaierror: [Errno -2] Name or service not known

this is my code:

from flask import Flask

app = Flask(name)

@app.route('/') def index(): return "Hello"

What am i doing wrong??? not sure why im getting the error "Name or service not known" Any suggestions??

1 Answer

Patrick Hooper
Patrick Hooper
39,003 Points
Patrick Hooper
Patrick Hooper
39,003 Points

I'm not sure if some pieces of your code got transformed or formatted strangely when you pasted it in, but the following should work:

from flask import Flask

app = Flask(__name__)

@app.route('/') 
def index():
    return "Hello"

The differences between that and what I see in your question are:

  1. app = Flask(name) should be app = Flask(__name__). __name__ is a special Python variable that needs the double underscores surrounding it.
  2. Formatting for the decorator and the function declaration. Python pays attention to things like line breaks and indentation in your code, so having all that done properly is important to correct code execution.