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+--- Thread: self function problem (/thread-26646.html)
self function problem - Agusben - May-08-2020
I have a problem with a program that uses a button that is created in a self function.
from tkinter import *
from tkinter import ttk
import turtle
from math import cos,sin,tan,pi
from threading import Event
root = Tk()
root.title("Mi app")
stop = Event()
class Graph:
def __init__(self, events):
self.graph_button=Button(root, text="Graph", command=Graph.graph)
self.graph_button.grid(row=3,column=1,padx=5,pady=5)
self.graph_param1_label=Label(root, text="Parameter 1:")
self.graph_param1_label.grid(row=4,column=1,padx=5,pady=5)
self.graph_param1_entry=Entry(root)
self.graph_param1_entry.grid(row=4,column=2,columnspan=3,padx=5,pady=5)
self.graph_param2_label=Label(root, text="Parameter 2:")
self.graph_param2_label.grid(row=5,column=1,padx=5,pady=5)
self.graph_param2_entry=Entry(root)
self.graph_param2_entry.grid(row=5,column=2,columnspan=3,padx=5,pady=5)
self.graph_param3_label=Label(root, text="Parameter 3:")
self.graph_param3_label.grid(row=6,column=1,padx=5,pady=5)
self.graph_param3_entry=Entry(root)
self.graph_param3_entry.grid(row=6,column=2,columnspan=3,padx=5,pady=5)
def graph():
# reset stop event, if it was already set
stop.clear()
pen.penup()
angle = 0
theta = 0.01
steps = int ((100*pi/theta))
a = 1 ; b = 1 ; c = 1 ; d = 1 ; e = 0 ; f = 0
g = 1 ; h = 1 ; i = 1 ; j = 1 ; k = 0 ; l = 0
m = 1 ; n = 1 ; o = 1 ; p = 1 ; q = 0 ; r = 0
s = 1 ; t = 1
for t in range(0,steps):
if stop.is_set():
break
try:
a = int(self.graph_param1_entry.get())
except ValueError:
a = 1
try:
b = int(self.graph_param2_entry.get())
except ValueError:
b = 1
try:
c = int(self.graph_param3_entry.get())
except ValueError:
c = 1
angle+=theta
x=(cos(a*angle)+cos(b*angle)+cos(c*angle))*(100)
y=(sin(a*angle)+sin(b*angle)+sin(c*angle))*(100)
pen.goto(x,y)
pen.pendown()
canvas=turtle.Canvas(master=root, width=650, height=650)
canvas.grid(row=0, column=0,columnspan=1, rowspan=20,padx=5,pady=5)
pen=turtle.RawTurtle(canvas)
pen.width(3)
choose_label=Label(root, text="Choose what you want to draw:")
choose_label.grid(column=1, row=1, columnspan=5, padx=5)
box = ttk.Combobox (root, values = ["Hypocycloid",
"Hypotrochoid",
"Epicycloid",
"Epitrochoid"])
box.grid(column = 1, columnspan=5, row = 2)
box.current()
box.bind('<<ComboboxSelected>>',Graph)
stop_button=Button(root, text="Stop", command=stop.set)
stop_button.grid(row=3,column=2,padx=5,pady=5)
root.mainloop()How can i make the graph function work with the parameters I set up in the __init__ self function?
RE: self function problem - Yoriz - May-08-2020
Add self to the graph method
def graph(self):
RE: self function problem - Agusben - May-08-2020
That is not the problem.
I keep getting this error and I don't know how to solve it
TypeError: graph() missing 1 required positional argument: 'self'
RE: self function problem - buran - May-08-2020
(May-08-2020, 02:17 PM)Agusben Wrote: That is not the problem.
I keep getting this error and I don't know how to solve it
TypeError: graph() missing 1 required positional argument: 'self'
(May-08-2020, 01:19 PM)Yoriz Wrote: Add self to the graph method
def graph(self):
RE: self function problem - Agusben - May-08-2020
I added self to the graph method and an error pops up.
from tkinter import *
from tkinter import ttk
import turtle
from math import cos,sin,tan,pi
from threading import Event
root = Tk()
root.title("Mi app")
stop = Event()
class Graph:
def __init__(self, events):
self.graph_button=Button(root, text="Graph", command=Graph.graph)
self.graph_button.grid(row=3,column=1,padx=5,pady=5)
self.graph_param1_label=Label(root, text="Parameter 1:")
self.graph_param1_label.grid(row=4,column=1,padx=5,pady=5)
self.graph_param1_entry=Entry(root)
self.graph_param1_entry.grid(row=4,column=2,columnspan=3,padx=5,pady=5)
self.graph_param2_label=Label(root, text="Parameter 2:")
self.graph_param2_label.grid(row=5,column=1,padx=5,pady=5)
self.graph_param2_entry=Entry(root)
self.graph_param2_entry.grid(row=5,column=2,columnspan=3,padx=5,pady=5)
self.graph_param3_label=Label(root, text="Parameter 3:")
self.graph_param3_label.grid(row=6,column=1,padx=5,pady=5)
self.graph_param3_entry=Entry(root)
self.graph_param3_entry.grid(row=6,column=2,columnspan=3,padx=5,pady=5)
def graph(self):
# reset stop event, if it was already set
stop.clear()
pen.penup()
angle = 0
theta = 0.01
steps = int ((100*pi/theta))
a = 1 ; b = 1 ; c = 1
for t in range(0,steps):
if stop.is_set():
break
try:
a = int(self.graph_param1_entry.get())
except ValueError:
a = 1
try:
b = int(self.graph_param2_entry.get())
except ValueError:
b = 1
try:
c = int(self.graph_param3_entry.get())
except ValueError:
c = 1
angle+=theta
x=(cos(a*angle)+cos(b*angle)+cos(c*angle))*(100)
y=(sin(a*angle)+sin(b*angle)+sin(c*angle))*(100)
pen.goto(x,y)
pen.pendown()
canvas=turtle.Canvas(master=root, width=650, height=650)
canvas.grid(row=0, column=0,columnspan=1, rowspan=20,padx=5,pady=5)
pen=turtle.RawTurtle(canvas)
pen.width(3)
choose_label=Label(root, text="Choose what you want to draw:")
choose_label.grid(column=1, row=1, columnspan=5, padx=5)
box = ttk.Combobox (root, values = ["Hypocycloid",
"Hypotrochoid",
"Epicycloid",
"Epitrochoid"])
box.grid(column = 1, columnspan=5, row = 2)
box.current()
box.bind('<<ComboboxSelected>>',Graph)
stop_button=Button(root, text="Stop", command=stop.set)
stop_button.grid(row=3,column=2,padx=5,pady=5)
root.mainloop()The error that appears after I select a value from the combobox is: TypeError: graph() missing 1 required positional argument: 'self'
RE: self function problem - deanhystad - May-08-2020
There are multiple ways you can use class in python and you are mixing two of them up. You can use class to define a namespace. I could write a class named Graph which has a function named graph(args) and call this function using Graph.graph(args).
You can use class to define a new type and create instances of this type. I can define Graph that has a METHOD named graph(self, args) and call that method using obj = Graph(), obj.graph(args).
You are mostly using class to create a new type. You will want to bind your button to call a method.
self.graph_button=Button(root, text="Graph", command=self.graph)
RE: self function problem - Agusben - May-08-2020
thank you so much.