CODEWITHSUNDEEP
pythongmpy
Olivier
Olivier

Reputation: 655

In python, how to call a function with an argument on a click event

I created the code below, but when I click on the click me button I get the following error message:

TypeError: 'mpfr' object is not callable

Would someone know what is wrong with the code?

import gmpy2 as g
from ipywidgets import widgets
from IPython.display import display

button = widgets.Button(description="Click Me!")
display(button)

max_precision = g.get_max_precision()
pi = g.const_pi()
g.set_context(g.context())

def set_bits_precision(decimal_precision):
    bits_precision = int(decimal_precision/g.log(2))
    if (bits_precision > max_precision): bits_precision = max_precision
    ctx = g.get_context()
    ctx.precision = bits_precision
    return

def square_root(number):
    return g.sqrt(number)

def circle_perimeter(radius):
    return 2*pi*radius 

def on_button_clicked(x):
    return square_root(x)

set_bits_precision(10)
print(pi)
button.on_click(on_button_clicked(2))

Upvotes: 5

Views: 4545

Answers (2)

hamflow
hamflow

Reputation: 321

Getting help from this thread, I think defining a class is the best way to run functions by jupyter widgets:

import gmpy2 as g
from ipywidgets import widgets
from IPython.display import display


max_precision = g.get_max_precision()
pi = g.const_pi()
g.set_context(g.context())

class Test(object):
    
    def __init__(self):
        self.random_button = widgets.Button(
            description='Click Me!')
        self.random_button.on_click(self.on_button_clicked)
    
    
    def set_bits_precision(self,decimal_precision):
        bits_precision = int(decimal_precision/g.log(2))
        if (bits_precision > max_precision): bits_precision = max_precision
        ctx = g.get_context()
        ctx.precision = bits_precision
        self.val = ctx.precision
        print(self.val)

    def square_root(self,x):
        self.val = g.sqrt(x)
        print(self.val)

    def circle_perimeter(self,radius):
        self.val = 2*pi*radius
        print(self.val)

    def on_button_clicked(self,*args):
        self.square_root(x=4)
        self.circle_perimeter(radius=10)
        self.set_bits_precision(decimal_precision=10)

buttonObject = Test()
display(buttonObject.random_button)

You have to edit x, radius, and precision manually each time so that data become updated for the Button. Good luck.

Upvotes: 1

jbch
jbch

Reputation: 599

button.on_click must be given a callback function. You pass the result of on_button_clicked evaluated with parameter 2 (so, literally the square root of 2) instead of passing in a function. You can use partial function evaluation to do what you want, by replacing your last line of code with:

import functools
button.on_click(functools.partial(on_button_clicked, 2))

Upvotes: 7

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