[Tutor] run with default value if input not given

[Saad Javed]

Hi,

#!/usr/bin/env python

import sys

x = 'Saad is a boy'

def main(x):
a = []
b = x.split(' ')
for item in b:
a.append(item)
print a
if __name__ == '__main__':
x = sys.argv[1]
main(x)


How can I make this program run with the default value of x if I don't
specify an argument at the command line?
It should do this:

saad at saad:~$ python test.py "Mariam is a girl"
['Mariam', 'is', 'a', 'girl']

saad at saad:~$ python test.py
['Saad', 'is', 'a', 'boy']

But the simply running "test.py" gives:
Traceback (most recent call last):
  File "input_test.py", line 13, in <module>
    x = sys.argv[1]
IndexError: list index out of range


Saad
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