How to use a function with an input?

Question

Ok so I have a function I've made called DrawGraph. This one function is pretty much my whole program.

DrawGraph(x, y, xv, yv, s)

At the start of the program I would like to have to type in this functions. And input the specific numbers, x, y , xv, etc....

so I can enter different number every time I started the program.

What is the easiest way or even best way to do this? I cant expect it will be too hard.

What I've tried so far:

DrawGraph(x, y, xv, yv, s) = input()

DrawGraph(x, y, xv, yv, s) = input(x, y, xv, yv, s)

input(x, y, xv, yv, s)

......none of these worked.......

just want to throw in there. At the end of the program if I have no input but just

DrawGraph(5, 5, 10, 10, 60)

it works grand. When I start using an input it really gets messed up

Answer 1

You can just do:

input()

And type:

DrawGraph(0, 1, 2, 3, 4)

input takes any python expression and evaluates it. This can become a security hole.

---

A better approach would be to use raw_input() :

args = map(float, raw_input().split())
DrawGraph(*args)

That code takes the input, turns it into a list, and then turns each item into a float.

Answer 2

x, y, xv, yv, s = input()

The input would have to be in the form:

1,2,3,4,5

or

x = input()
y = input()
xv = input()
yv = input()
s = input()

The input for this would be in the form:

1
2
3
4
5

Either way, you would then need to pass the variables into your function.

Note that input can take a string parameter as the user prompt, for example:

x = input("Give me x:")

Answer 3

Unless you want to parse the values from one input, it would be easier to request each value and save it to a variable one at a time, and then calling your function.

x = input("Enter x:")
y = input("Enter y:")
xv = input("Enter xv:")
yv = input("Enter yv:")
s = input("Enter s:")

DrawGraph(x, y, xv, yv, s)

This will get the values from the user and then call the function with those values.

Answer 4

There is a good stack overflow question on user input in python here

You can accept the values as cmd line parameters, or use raw_input to obtain them.

Answer 5

args = [int(i) for i in raw_input().split()]

DrawGraph(*args)

For Python 3, you'd just replace raw_input() with input() . I'm sure there's a slightly easier way (aside from the potentially-dangerous usage of the old version of input() , as mentioned in Eric's answer), but I'm a little rushed at the moment and don't have time to think about it too much.

Answer 6

def do_draw_graph():
    x  = int(raw_input("Value for x? "))
    y  = int(raw_input("Value for y? "))
    xv = int(raw_input("Value for xv? "))
    yv = int(raw_input("Value for yv? "))
    s  = int(raw_input("Value for s? "))
    DrawGraph(x, y, xv, yv, s)

Works when using the turtle module in IDLE

Answer 7

 raw_input() is renamed to input() in Python3 

  x=int(input("enter x" )) 
  y=int(input("enter y" ))
  xv=int(input("enter xv" ))
  yv=int(input("enter yv" ))
  s=int(input("enter s" ))
  DrawGraph(x,y,xv,yv,s)

 it depends on what type of number are the inputs. if they'r decimals like 1.2 instead of int use float