Calling a method inside of init function python - python-2.7

Question

I'm having an issue with this code:
import math
class Money(object):
def __init__(self, salary):
self.salary = salary
sal(self.salary)
def sal(self, x):
y = ( x - ( ( (x * 0.22) + 6534) ) - (1900.9408 + ( (x - 37568)*.077) ) )
print '-----------------------------------------------------------'
print 'monthly income before tax will be: ${0:.2f}' .format(x/12)
print 'bi-weekly income before tax will be: ${0:.2f}' .format(x/24)
print 'Hourly after tax: ${0:.2f}' .format(x/24/70)
print '-----------------------------------------------------------'
print 'Income after tax will be: ${0:.2f}' .format(y)
print 'Monthly after tax: ${0:.2f}' .format((y/12))
print 'bi-weekly after tax: ${0:.2f}' .format((y/24))
print 'Hourly after tax: ${0:.2f}' .format(y/24/70)
answer = raw_input('Do you want to do this again?\nType [Y] or [N]: ')
if( answer == 'Y'):
sal(x)
else:
print 'Thank you!'
return
def main():
x = input('Enter your taxable income: ')
salaryLister = Money(x)
main()
The traceback shows this:
Traceback (most recent call last):
File "taxableincome.py", line 35, in <module>
main()
File "taxableincome.py", line 33, in main
salaryLister = Money(x)
File "taxableincome.py", line 7, in __init__
sal(self.salary)
NameError: global name 'sal' is not defined
What does:
global name 'sal' is not defined mean?
Feel free to make comments about my design as well. I'd love to learn.

Answer 1

use self.sal, this is how you call instance methods of classes in python
How this works in python is, If you look at the method signature you have
def sal(self, salary)
basically, it needs the class reference as the first variable. And in python when you do self.sal it translates to
Money.sal(self, salary)
You can also call the method like this, but the recommended way is
self.sal(salary)
As per comments on your code, There definitely aren't any clear red flags. Though the last return statement in the sal function is not required. Its not a problem having it there, just something that caught my eye.
Also since you asked, I'd like to point this out. Please try to keep to a coding standard. let it be your own or someone else's. The important thing is consistency. But PEP-8 is generally the accepted style for python. You even have plugins for your editor which help you stick to it. You might want to read the style guide linked here.