Mixing
How to get reference to an instance attribute, and modify its value from outside
I'm working on an application in tkinter. I have many Entry widgets in UI, and a few classes in app engine. I need to bind tkinter variables of those entries to instances attributes.
i.e.:
class Pipe(Variable):
"""class for pipes"""
def __init__(self):
self.diameter = 0
self.variables = {}
pipe1 = Pipe(self)
pipe2 = Pipe(self)
I want to bind value from one entry to pipe1.diameter, and value from another entry to pipe2.diameter. I'm doing it by a trace function, where is lambda statement, pointing to a function, which identifies entry, and, using a dictionary proper for each instance, pass a value from entry to dictionary value. Dictionaries are produced like here, and then passed as instance attribute:
def pipe1_vars(object_):
variables = {
'ui_variable_name_for_pipe1_diameter': [object_.diameter]
}
return variables
def pipe2_vars(object_):
variables = {
'ui_variable_name_for_pipe2_diameter': [object_.diameter]
}
return variables
pipe1.variables = pipe1_vars(pipe1)
pipe2.variables = pipe2_vars(pipe2)
Unfortunately, Variable class method, assigning value, isn't working properly.
class Variable():
def set_var_value(variable_name, value):
ui_variable = tkinterbuilder.get_variable(variable_name)
self.variables[variable_name][0] = value
if ui_variable.get() != value:
ui_variable.set(value)
Obviously self.variables[variable_name][0] is something different than self.diameter. The dictionary value is changing, but instance.diameter stays the same.
How can I pass a real instance attribute to this method, instead of a copy in a dictionary value?
I'm assuming it is important to my app, to build something working as those dictionaries, because i need to bind similar attributes of different pipes to different entries - so it's have to be defined outside of a Pipe() class. I don't know if I should change dictionary to something else, or maybe should I rebuild those functions, building dictionary. I've run out of ideas, what to ask google.
Code is much complex, I've posted only most important elements, but if any other details are important, please note in comment.
python oop reference
asked Nov 19 '18 at 22:29
bloniaqbloniaq
195
add a comment |
I'm working on an application in tkinter. I have many Entry widgets in UI, and a few classes in app engine. I need to bind tkinter variables of those entries to instances attributes.
i.e.:
class Pipe(Variable):
"""class for pipes"""
def __init__(self):
self.diameter = 0
self.variables = {}
pipe1 = Pipe(self)
pipe2 = Pipe(self)
I want to bind value from one entry to pipe1.diameter, and value from another entry to pipe2.diameter. I'm doing it by a trace function, where is lambda statement, pointing to a function, which identifies entry, and, using a dictionary proper for each instance, pass a value from entry to dictionary value. Dictionaries are produced like here, and then passed as instance attribute:
def pipe1_vars(object_):
variables = {
'ui_variable_name_for_pipe1_diameter': [object_.diameter]
}
return variables
def pipe2_vars(object_):
variables = {
'ui_variable_name_for_pipe2_diameter': [object_.diameter]
}
return variables
pipe1.variables = pipe1_vars(pipe1)
pipe2.variables = pipe2_vars(pipe2)
Unfortunately, Variable class method, assigning value, isn't working properly.
class Variable():
def set_var_value(variable_name, value):
ui_variable = tkinterbuilder.get_variable(variable_name)
self.variables[variable_name][0] = value
if ui_variable.get() != value:
ui_variable.set(value)
Obviously self.variables[variable_name][0] is something different than self.diameter. The dictionary value is changing, but instance.diameter stays the same.
How can I pass a real instance attribute to this method, instead of a copy in a dictionary value?
I'm assuming it is important to my app, to build something working as those dictionaries, because i need to bind similar attributes of different pipes to different entries - so it's have to be defined outside of a Pipe() class. I don't know if I should change dictionary to something else, or maybe should I rebuild those functions, building dictionary. I've run out of ideas, what to ask google.
Code is much complex, I've posted only most important elements, but if any other details are important, please note in comment.
python oop reference
asked Nov 19 '18 at 22:29
bloniaqbloniaq
195
add a comment |
I'm working on an application in tkinter. I have many Entry widgets in UI, and a few classes in app engine. I need to bind tkinter variables of those entries to instances attributes.
i.e.:
class Pipe(Variable):
"""class for pipes"""
def __init__(self):
self.diameter = 0
self.variables = {}
pipe1 = Pipe(self)
pipe2 = Pipe(self)
I want to bind value from one entry to pipe1.diameter, and value from another entry to pipe2.diameter. I'm doing it by a trace function, where is lambda statement, pointing to a function, which identifies entry, and, using a dictionary proper for each instance, pass a value from entry to dictionary value. Dictionaries are produced like here, and then passed as instance attribute:
def pipe1_vars(object_):
variables = {
'ui_variable_name_for_pipe1_diameter': [object_.diameter]
}
return variables
def pipe2_vars(object_):
variables = {
'ui_variable_name_for_pipe2_diameter': [object_.diameter]
}
return variables
pipe1.variables = pipe1_vars(pipe1)
pipe2.variables = pipe2_vars(pipe2)
Unfortunately, Variable class method, assigning value, isn't working properly.
class Variable():
def set_var_value(variable_name, value):
ui_variable = tkinterbuilder.get_variable(variable_name)
self.variables[variable_name][0] = value
if ui_variable.get() != value:
ui_variable.set(value)
Obviously self.variables[variable_name][0] is something different than self.diameter. The dictionary value is changing, but instance.diameter stays the same.
How can I pass a real instance attribute to this method, instead of a copy in a dictionary value?
I'm assuming it is important to my app, to build something working as those dictionaries, because i need to bind similar attributes of different pipes to different entries - so it's have to be defined outside of a Pipe() class. I don't know if I should change dictionary to something else, or maybe should I rebuild those functions, building dictionary. I've run out of ideas, what to ask google.
Code is much complex, I've posted only most important elements, but if any other details are important, please note in comment.
python oop reference
asked Nov 19 '18 at 22:29
bloniaqbloniaq
195
I'm working on an application in tkinter. I have many Entry widgets in UI, and a few classes in app engine. I need to bind tkinter variables of those entries to instances attributes.
i.e.:
class Pipe(Variable):
"""class for pipes"""
def __init__(self):
self.diameter = 0
self.variables = {}
pipe1 = Pipe(self)
pipe2 = Pipe(self)
I want to bind value from one entry to pipe1.diameter, and value from another entry to pipe2.diameter. I'm doing it by a trace function, where is lambda statement, pointing to a function, which identifies entry, and, using a dictionary proper for each instance, pass a value from entry to dictionary value. Dictionaries are produced like here, and then passed as instance attribute:
def pipe1_vars(object_):
variables = {
'ui_variable_name_for_pipe1_diameter': [object_.diameter]
}
return variables
def pipe2_vars(object_):
variables = {
'ui_variable_name_for_pipe2_diameter': [object_.diameter]
}
return variables
pipe1.variables = pipe1_vars(pipe1)
pipe2.variables = pipe2_vars(pipe2)
Unfortunately, Variable class method, assigning value, isn't working properly.
class Variable():
def set_var_value(variable_name, value):
ui_variable = tkinterbuilder.get_variable(variable_name)
self.variables[variable_name][0] = value
if ui_variable.get() != value:
ui_variable.set(value)
Obviously self.variables[variable_name][0] is something different than self.diameter. The dictionary value is changing, but instance.diameter stays the same.
How can I pass a real instance attribute to this method, instead of a copy in a dictionary value?
I'm assuming it is important to my app, to build something working as those dictionaries, because i need to bind similar attributes of different pipes to different entries - so it's have to be defined outside of a Pipe() class. I don't know if I should change dictionary to something else, or maybe should I rebuild those functions, building dictionary. I've run out of ideas, what to ask google.
Code is much complex, I've posted only most important elements, but if any other details are important, please note in comment.
python oop reference
python oop reference
asked Nov 19 '18 at 22:29
bloniaqbloniaq
195
asked Nov 19 '18 at 22:29
bloniaqbloniaq
195
asked Nov 19 '18 at 22:29
bloniaqbloniaq
195
asked Nov 19 '18 at 22:29
bloniaqbloniaq
195
asked Nov 19 '18 at 22:29
bloniaqbloniaq
195
195
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
If the number of Pipe attributes is small, make them properties, and when you create a Pipe object, pass it the corresponding tk binded variable:
import tkinter as tk
from tkinter import Tk, ttk
root = Tk()
var_e1 = tk.StringVar()
def print_e1():
print(var_e1.get())
def inc_e1():
var_e1.set(int(var_e1.get())+1)
class Pipe():
def __init__(self, tkvar):
self.tkvar = tkvar
tkvar.set('')
@property
def diameter(self):
return self.tkvar.get()
@diameter.setter
def diameter(self, value):
self.tkvar.set(value)
e1 = tk.Entry(root, textvariable=var_e1)
b1 = tk.Button(root, text='Print e1', command=print_e1)
b2 = tk.Button(root, text='Increment e1', command=inc_e1)
e1.pack(side=tk.LEFT)
b1.pack()
b2.pack()
p1 = Pipe(var_e1)
p1.diameter = 200
root.mainloop()
answered Nov 21 '18 at 15:18
progmaticoprogmatico
1,8671512
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
If the number of Pipe attributes is small, make them properties, and when you create a Pipe object, pass it the corresponding tk binded variable:
import tkinter as tk
from tkinter import Tk, ttk
root = Tk()
var_e1 = tk.StringVar()
def print_e1():
print(var_e1.get())
def inc_e1():
var_e1.set(int(var_e1.get())+1)
class Pipe():
def __init__(self, tkvar):
self.tkvar = tkvar
tkvar.set('')
@property
def diameter(self):
return self.tkvar.get()
@diameter.setter
def diameter(self, value):
self.tkvar.set(value)
e1 = tk.Entry(root, textvariable=var_e1)
b1 = tk.Button(root, text='Print e1', command=print_e1)
b2 = tk.Button(root, text='Increment e1', command=inc_e1)
e1.pack(side=tk.LEFT)
b1.pack()
b2.pack()
p1 = Pipe(var_e1)
p1.diameter = 200
root.mainloop()
answered Nov 21 '18 at 15:18
progmaticoprogmatico
1,8671512
add a comment |
If the number of Pipe attributes is small, make them properties, and when you create a Pipe object, pass it the corresponding tk binded variable:
import tkinter as tk
from tkinter import Tk, ttk
root = Tk()
var_e1 = tk.StringVar()
def print_e1():
print(var_e1.get())
def inc_e1():
var_e1.set(int(var_e1.get())+1)
class Pipe():
def __init__(self, tkvar):
self.tkvar = tkvar
tkvar.set('')
@property
def diameter(self):
return self.tkvar.get()
@diameter.setter
def diameter(self, value):
self.tkvar.set(value)
e1 = tk.Entry(root, textvariable=var_e1)
b1 = tk.Button(root, text='Print e1', command=print_e1)
b2 = tk.Button(root, text='Increment e1', command=inc_e1)
e1.pack(side=tk.LEFT)
b1.pack()
b2.pack()
p1 = Pipe(var_e1)
p1.diameter = 200
root.mainloop()
answered Nov 21 '18 at 15:18
progmaticoprogmatico
1,8671512
add a comment |
If the number of Pipe attributes is small, make them properties, and when you create a Pipe object, pass it the corresponding tk binded variable:
import tkinter as tk
from tkinter import Tk, ttk
root = Tk()
var_e1 = tk.StringVar()
def print_e1():
print(var_e1.get())
def inc_e1():
var_e1.set(int(var_e1.get())+1)
class Pipe():
def __init__(self, tkvar):
self.tkvar = tkvar
tkvar.set('')
@property
def diameter(self):
return self.tkvar.get()
@diameter.setter
def diameter(self, value):
self.tkvar.set(value)
e1 = tk.Entry(root, textvariable=var_e1)
b1 = tk.Button(root, text='Print e1', command=print_e1)
b2 = tk.Button(root, text='Increment e1', command=inc_e1)
e1.pack(side=tk.LEFT)
b1.pack()
b2.pack()
p1 = Pipe(var_e1)
p1.diameter = 200
root.mainloop()
answered Nov 21 '18 at 15:18
progmaticoprogmatico
1,8671512
If the number of Pipe attributes is small, make them properties, and when you create a Pipe object, pass it the corresponding tk binded variable:
import tkinter as tk
from tkinter import Tk, ttk
root = Tk()
var_e1 = tk.StringVar()
def print_e1():
print(var_e1.get())
def inc_e1():
var_e1.set(int(var_e1.get())+1)
class Pipe():
def __init__(self, tkvar):
self.tkvar = tkvar
tkvar.set('')
@property
def diameter(self):
return self.tkvar.get()
@diameter.setter
def diameter(self, value):
self.tkvar.set(value)
e1 = tk.Entry(root, textvariable=var_e1)
b1 = tk.Button(root, text='Print e1', command=print_e1)
b2 = tk.Button(root, text='Increment e1', command=inc_e1)
e1.pack(side=tk.LEFT)
b1.pack()
b2.pack()
p1 = Pipe(var_e1)
p1.diameter = 200
root.mainloop()
answered Nov 21 '18 at 15:18
progmaticoprogmatico
1,8671512
answered Nov 21 '18 at 15:18
progmaticoprogmatico
1,8671512
answered Nov 21 '18 at 15:18
progmaticoprogmatico
1,8671512
answered Nov 21 '18 at 15:18
progmaticoprogmatico
1,8671512
1,8671512
add a comment |
add a comment |
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