Dynamic buttons with dynamic command executes only last command tkinter
Question:
I need to generate buttons randomly from A-Z and that will execute respective python files using os.system('A.py') when clicked. I used random_alphabets = random.sample(range(1, 26), 5) to generate the random numbers and executed a for loop to add the buttons dynamically like:
for i in self.random_alphabets:
a_button = tk.Button(self,text=chr(i+64),command=lambda: os.system(str(chr(i+64))+".py"))
a_button.grid(row=0,column=i)
When I run this GUI, only the last randomly generated file gets executed. Suppose the randomly generated alphabets are [‘U’, ‘S’, ‘E’, ‘Q’, ‘O’], then when I click on any button, only the “O.py” gets executed.
How to tackle this issue?
Answers:
You need to capture the current value, as the lambda closure will always only close over names, not their values. So a simple lambda i=i: ... should do the trick.
I need to generate buttons randomly from A-Z and that will execute respective python files using os.system('A.py') when clicked. I used random_alphabets = random.sample(range(1, 26), 5) to generate the random numbers and executed a for loop to add the buttons dynamically like:
for i in self.random_alphabets:
a_button = tk.Button(self,text=chr(i+64),command=lambda: os.system(str(chr(i+64))+".py"))
a_button.grid(row=0,column=i)
When I run this GUI, only the last randomly generated file gets executed. Suppose the randomly generated alphabets are [‘U’, ‘S’, ‘E’, ‘Q’, ‘O’], then when I click on any button, only the “O.py” gets executed.
How to tackle this issue?
You need to capture the current value, as the lambda closure will always only close over names, not their values. So a simple lambda i=i: ... should do the trick.