``````#created by Jaron Graveley
#April 26th, 2011
#This program completes reservations for Jon Von Poechman’s airline in an easy to use program
#variable list:
#i=counter used to limit the number of seats present on the diagram
#n= counter to display the row number on the diagram
#num_booked=counts the number of booked seats so the program stops
#m=counter used to seperate the rows in the plane
#r=row counter
#p=position counter
#plane=list of seats on the plane showing taken and empty seats
#plane_name=same list as plane except it shows names for management use only
#seat=shows the letter o for an open seat
#name=the users name
#row_num= the row number that the passenger wants to sit in
#position= the position that the passenger wants to sit in
#request= the users requested seat
#taken= the equation used to bok the seat
#exit= restarts the  loop for the next person to book
#number= the employee number of the management member
i=0
n=1
num_booked=0
m=0
r=1
p=0
plane=[]
plane_name=[]
while r<21:
if m==4:
r+=1
m=0
p+=1
if p==5:
p=1
m+=1
seat="r"+str(r)+"p"+str(p)
if seat=="r21p1":
break
else:
seat='o'
plane_name.append(seat)
plane.append(seat)

def diagram():
i=0
n=1
print "Below is a list of available seats marked with a 'o'. Those marked with an 'x' are taken:"
print "  A    B    C    D"
while i<80:
print plane[i:i+4], n
i+=4
n+=1
while num_booked<80:
print "Welcome to Jaron's Airline"
name=raw_input("What is your name. If you are a member of airport management please type 'management'. ")
if name!='management':
diagram()
def row():
row_num=input("Which row number would you like to sit in? <1-20> ")
if 0>row_num>20:
print "That row is not on the plane"
row()
row()
def pos():
position=raw_input("Which seat position would you like to sit in? <A-D> ")
position=position.upper()
if position=='A':
position='1'
elif position=='B':
position='2'
elif position=='C':
position='3'
elif position=='D':
position='4'
else:
print "That position is not on the plane"
pos()
pos()
request=(row_num*4-(4-int(position)))-1
if plane[request]=='x':
print "Sorry that seat is taken, please choose another seat."
else:
taken=(row_num*4-(4-int(position)))-1
plane[taken]='x'
plane_name[taken]=name
print "Your seat has successfully been booked."
exit=raw_input("press enter to exit")
num_booked+=1

elif name=='management':
if number=='123':
print "Below is a list of passengers that will be boarding the plane:"
i=0
n=1
print "  A    B    C    D"
while i<80:
print plane_name[i:i+4], n
i+=4
n+=1
exit=raw_input("press enter to exit")
else:
print "That is not a valid employee number"``````

this is the results I get when running the program:

Python 2.4.1 (#65, Mar 30 2005, 09:13:57) [MSC v.1310 32 bit (Intel)]
>>> [evaluate funAssign4-plane.py]
Welcome to Jaron's Airline
What is your name. If you are a member of airport management please type 'management'. j
Below is a list of available seats marked with a 'o'. Those marked with an 'x' are taken:
A B C D
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Which row number would you like to sit in? <1-20> 5
Which seat position would you like to sit in? <A-D> b
Traceback (most recent call last):
File "<string>", line 81, in <fragment>
NameError: name 'row_num' is not defined
>>>

I'm not sure what i am doing wrong i looked at line 81 and all it says is
" if plane[request]=='x':"

Thanks,

Jaro

You are using a variable row_num which was only defined in the function row() and does not exist outside this function. It's better to write separate functions with return value to get user input, like this

``````# -*-coding: utf8-*-
#created by Jaron Graveley
#April 26th, 2011
#This program completes reservations for Jon Von Poechman’s airline in an easy to use program
#variable list:
#i=counter used to limit the number of seats present on the diagram
#n= counter to display the row number on the diagram
#num_booked=counts the number of booked seats so the program stops
#m=counter used to seperate the rows in the plane
#r=row counter
#p=position counter
#plane=list of seats on the plane showing taken and empty seats
#plane_name=same list as plane except it shows names for management use only
#seat=shows the letter o for an open seat
#name=the users name
#row_num= the row number that the passenger wants to sit in
#position= the position that the passenger wants to sit in
#request= the users requested seat
#taken= the equation used to bok the seat
#exit= restarts the  loop for the next person to book
#number= the employee number of the management member
i=0
n=1
num_booked=0
m=0
r=1
p=0
plane=[]
plane_name=[]
while r<21:
if m==4:
r+=1
m=0
p+=1
if p==5:
p=1
m+=1
seat="r"+str(r)+"p"+str(p)
if seat=="r21p1":
break
else:
seat='o'
plane_name.append(seat)
plane.append(seat)

def diagram():
i=0
n=1
print "Below is a list of available seats marked with a 'o'. Those marked with an 'x' are taken:"
print "  A    B    C    D"
while i<80:
print plane[i:i+4], n
i+=4
n+=1

def get_row():
row = int(raw_input("Which row number would you like to sit in? <1-20> "))
if (0 < row < 20): # the contrary is not 0 > row > 20 !
return row
else:
print "That row is not on the plane"

def get_pos():
position = raw_input("Which seat position would you like to sit in? <A-D> ")
position=position.strip().upper()
if position in tuple("ABCD"):
position = 1 + "ABCD".index(position)
return position
else:
print "That position is not on the plane"

while num_booked<80:
print "Welcome to Jaron's Airline"
name=raw_input("What is your name. If you are a member of airport management please type 'management'. ")
if name!='management':
diagram()
row_num = get_row()
position = get_pos()
request=(row_num*4-(4-int(position)))-1
if plane[request]=='x':
print "Sorry that seat is taken, please choose another seat."
else:
taken=(row_num*4-(4-int(position)))-1
plane[taken]='x'
plane_name[taken]=name
print "Your seat has successfully been booked."
exit=raw_input("press enter to exit")
num_booked+=1

elif name=='management':
if number=='123':
print "Below is a list of passengers that will be boarding the plane:"
i=0
n=1
print "  A    B    C    D"
while i<80:
print plane_name[i:i+4], n
i+=4
n+=1
exit=raw_input("press enter to exit")
else:
print "That is not a valid employee number"``````

Thank you so much!