[FIXED] How to use argv with Spyder

Issue

I'm running the code below in Spyder. I have typed it in a py file and simply hit the run button.

When I try to run it I get the error:

ValueError: need more than 1 value to unpack

As shown here you are meant to give the inputs for the argv variable before running the program but I don't know how to do this is spyder?

http://learnpythonthehardway.org/book/ex13.html

from sys import argv

script, first, second, third = argv

print "The script is called:", script
print "The first variable is:", first
print "The second variable is:", second
print "Your third variable is:", third

Solution

Read the FAQ at the bottom of the page, it specifically mentions this error.

Common Student Questions

Q. When I run it I get ValueError: need more than 1 value to unpack.

Remember that an important skill is paying attention to details. If you look at the What You Should See section you see that I run the script with parameters on the command line. You should replicate how I ran it exactly.

Make sure you run the command:

$ python ex13.py first 2nd 3rd

>> The script is called: ex13.py  
>> Your first variable is: first  
>> Your second variable is: 2nd  
>> Your third variable is: 3rd

You can ensure that the arguments are supplied.

if __name__ == '__main__':
    if len(argv) == 4:
        script, first, second, third = argv

        print 'The script is called:', script
        print 'Your first variable is:', first
        print 'Your second variable is:', second
        print 'Your third variable is:', third
    else:
        print 'You forgot the args...'

Answered By - Mr. Polywhirl