[Solved] What is wrong with this button widget code?import matplotlib.pyplot as plt from matplotlib.widgets import Button fig, ax = plt.subplots() button_ax = plt.axes([0.7, 0.05, 0.1, 0.... | Matplotlib

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What is wrong with this button widget code?

import matplotlib.pyplot as plt
from matplotlib.widgets import Button

fig, ax = plt.subplots()
button_ax = plt.axes([0.7, 0.05, 0.1, 0.075])
button = Button(button_ax, 'Press')

button.on_clicked(on_press)

def on_press(event):
    print('Button pressed')

AButton label must be an integer

BThe callback function on_press is defined after it is used

CAxes coordinates are out of range

DButton widget requires a slider parameter

Step-by-Step Solution

Solution:

Step 1: Check callback function order
The on_press function is passed to on_clicked before it is defined, causing a NameError.
Step 2: Verify other parts
Button label can be string, axes coordinates are valid, and no slider parameter is needed.
Final Answer:
The callback function on_press is defined after it is used -> Option B
Quick Check:
Define callback before registering it [OK]

Quick Trick: Always define callback functions before using them [OK]

Common Mistakes:

Defining callback after usage
Expecting label to be integer
Misunderstanding axes coordinates

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What is wrong with this button widget code?

Step 1: Check callback function order

Step 2: Verify other parts

Final Answer:

Quick Check:

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