如何提取一个函数的参数并将其用于另一个使用与第一个函数有2个不同结果的函数中？

Question

New to coding, not sure how to ask this. I have a function that creates buttons:

from tkinter import *
root = Tk()
canvas = Canvas(root)

def create_button(location_name, position_x, position_y):
    Button(root, text = location_name).place(x=position_x, y=position_y, width=60, height=20)

a = create_button("A",20,30)
b = create_button("B",70,80)

canvas.grid()
root.mainloop()

I want to create a function that makes a line between any button. For example with A and B it has to take into account the parameters of A (position_x, position_y) and parameters of B (position_x, position_y). Is it possible to do that ?

Answer 1

You should keep this data as list or dictionary and then you can use them with many functions

# --- functions ---

def create_button(name):
    x, y = points[name]

    button = Button(root, text=name)
    button.place(x=x, y=y, width=60, height=20)

    return button

def create_line(name1, name2):
    x1, y1 = points[name1]
    x2, y2 = points[name2]

    line = canvas.create_line(x1, y1, x2, y2, ...)

    return line

# --- main ---

points = {
    "A": [20,30], 
    "B": [70,80],
}

buttons = {}
lines = {}

buttons["A"] = create_button("A")
buttons["B"] = create_button("B")
lines[("A", "B")] = create_line("A", "B")

You can even use for loop to create it

points = {
    "A": [20,30], 
    "B": [70,80],
    "C": [50,0]
}

connections = [
    ("A", "B"), # or "AB" but it needs modification in `for`
    ("A", "C"),
    #("B", "C") # you can skip some connections
]

buttons = {}
lines = {}

for name in points.keys():
    buttons[name] = create_button(name)

for name1, name2 in connections:
    lines[(name1, name2)] = create_line(name1, name2)
    #lines[(name2, name1)] = lines[(name1, name2)] # "AB" = "BA"

BTW: and later you can read points and connections from file.

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BTW: there is module Networx to work with graphs which have nodes and edges ( points and connections ) but it can be not so usefull for you. See: random draw .