ExFree.py
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	import numpy as np
	import ipywidgets as widgets
	import matplotlib.pyplot as plt
	from IPython.display import display, clear_output

	def EvaluateNumericalSolution(inputstring, solution, tolerance):
	notaNumber = "Result is not a number"
	correct = "Your answer is correct!"
	wrong = "Wrong. Please try again."
	clear_output();
	try:
	result = float(inputstring)
	except ValueError:
	print(notaNumber)
	return
	if np.abs(result-solution)<=tolerance:
	print(correct)
	else:
	print(wrong)


	"""Question 3"""
	def EvalFilmTemp():
	text = widgets.Text(placeholder='Type your answer')
	display(text)
	button = widgets.Button(description="Check answer")
	output = widgets.Output()
	display(button, output)

	def evaluateFilmTemp(b):
	with output:
	if text.value!="":
	solution = 37
	resultstring = text.value
	tolerance = 0
	EvaluateNumericalSolution(resultstring, solution, tolerance)
	else:
	clear_output();

	button.on_click(evaluateFilmTemp)

	"""Question 4.3"""
	def EvalBoundaryThickness():
	text = widgets.Text(placeholder='Type your answer')
	display(text)
	button = widgets.Button(description="Check answer")
	output = widgets.Output()
	display(button, output)

	def evaluateBoundaryThickness(b):
	with output:
	if text.value!="":
	solution = 6.3
	resultstring = text.value
	tolerance = 0.1
	EvaluateNumericalSolution(resultstring, solution, tolerance)
	else:
	clear_output();

	button.on_click(evaluateBoundaryThickness)