Still confused about how passing arguments works

Still confused about how passing arguments works - Printable Version

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Still confused about how passing arguments works - RedSkeleton007 - Apr-25-2018

I have a simple user input program:

#!/usr/bin/python
#QuickTest.py

def getLocation(x,y,z):
    x = input("Specify horizontal position: ")#latitude
    y = input("Specify vertical position: ")#longitude
    z = input("Specify altitude: ")#above sea level
    return x,y,z

def QuickTestMain():
##    x = 0
##    y = 0
##    z = 0
    getLocation(x,y,z)
    print("You are located at " + str(x) + "degrees latitude, " +
          str(y) + " degrees longitude, " + " and " + str(z) +
          " feet above sea level.")

QuickTestMain()

When lines 11 - 13 are not commented out, it just prints all 0's (I just wanted to initialize them, so that they exist in the program):

Error:========== RESTART: I:/Python/Python36-32/SamsPrograms/QuickTest.py ==========
Specify horizontal position: 3
Specify vertical position: 4
Specify altitude: 5
You are located at 0degrees latitude, 0 degrees longitude,  and 0 feet above sea level.
>>>

And then if I comment them out, I get:

Error:========== RESTART: I:/Python/Python36-32/SamsPrograms/QuickTest.py ==========
Traceback (most recent call last):
  File "I:/Python/Python36-32/SamsPrograms/QuickTest.py", line 19, in <module>
    QuickTestMain()
  File "I:/Python/Python36-32/SamsPrograms/QuickTest.py", line 14, in QuickTestMain
    getLocation(x,y,z)
NameError: name 'x' is not defined
>>>

How do I fix this?

RE: Still confused about how passing arguments works - Larz60+ - Apr-25-2018

x,y,z = getLocation(x,y,z)

RE: Still confused about how passing arguments works - mlieqo - Apr-25-2018

There is no need for your getLocation function to have x,y,z arguments, because user will input them after the function is called.

def getLocation():
    x = input("Specify horizontal position: ")#latitude
    y = input("Specify vertical position: ")#longitude
    z = input("Specify altitude: ")#above sea level
    return x,y,z

and then when you are printing it inside QuickTestMain function add

x,y,z = getLocation()

because you need to store the return values from your getLocation function, otherwise they will get lost :D

RE: Still confused about how passing arguments works - snippsat - Apr-25-2018

As mention bye @mlieqo getLocation() shall not have argument in,they get create in function.
PEP-8 and f-string.

def location():
    x = input("Specify horizontal position: ")
    y = input("Specify vertical position: ")
    z = input("Specify altitude: ")
    return x, y, z

def quick_test():
    latitude,longitude,altitude = location()
    print(f'You are located at {latitude} degrees latitude '
          f'{longitude} degrees longitude and {altitude} feet above sea level.')

quick_test()

Output:
You are located at 100 degrees latitude 200 degrees longitude and 300 feet above sea level.