python variable scope issue
<p>i am stuck at scope resolution in python.
let me explain a code first:</p>

<pre><code>class serv_db:
def __init__(self, db):
 self.db = db 
 self.dbc = self.db.cursor()

def menudisp (self):
 print"Welcome to Tata Motors"
 print"Please select one of the options to continue:"
 print"1. Insert Car Info"
 print"2. Display Car Info"
 print"3. Update Car Info"
 print"4. Exit"
 menu_choice = raw_input("Enter what you want to do: ")
 if menu_choice==1: additem()
 elif menu_choice==2: getitem()
 elif menu_choice==3: edititem()
 elif menu_choice==4: sys.exit()

def additem (self):
 reg = raw_input("\n\nTo continue, please enter the Registration # of car: ") 
 print"There are 3 books in our database:"
 print"1. Job Card"
 print"2. Car"
 print"3. Customer"
 ch = raw_input("\nEnter your choice: ")
 if ch==1: adnewjob()
 elif ch==2: adnewcar(self, reg)
 elif ch==3: adnewcust()

def adnewcar ( self, reg ):
print "adding info to database: car"
    carreg = reg  #error here
    mftr = raw_input("Enter the Manufacturer of your car: ")
    model = raw_input("Enter the Model of your car: ")
    car_tb = (carreg,mftr,model)
    #writing to DB
    self.dbc.execute("insert into car(reg, mftr, model) values(%s,%s,%s)", car_tb)

def main():
        db = MySQLdb.connect(user="root", passwd="", db="tatamotors")
        service = serv_db(db)
        service.menudisp()

if __name__ == '__main__':
     main()
</code></pre>

<p>i am inputting a registration num into the variable <code>reg</code> now based upon the user's choice one of three functions is performed. i havent yet created the <code>adnewjob()</code> and <code>adnewcust()</code> functions yet. the <code>adnewcar()</code> is ready. when i try to pass the value down to the adnewcar() function, it gives an error saying:</p>

<p>This is the entire traceback:</p>

<pre><code>Traceback &lt;most recent call last&gt;:
  File "tatamotors.py", line 5, in &lt;module&gt;
    class serv_db:
  File "tatamotors.py", line 38, in serv_db
    carreg = reg
Name Error: name 'reg' is not defined
</code></pre>

<p>i am pretty sure i am making some mistake. n00b here. go easy. thanks :)</p>

<p><strong>EDIT</strong> i have joined all the relevant functions and classes. i have also included the related functions too.</p>
