Merge branch 'exercise-checking' into 'main'

Exercise checking

See merge request !53

book/cookbook/example_gumbel.py

@@ -10,15 +10,16 @@ check_float = lambda a, b: isclose(a, b, rel_tol=0, abs_tol=tolerance)
 @check
 def check_example(glob):
 	mu, beta = glob["mu"], glob["beta"]
-	if (check_float(mu, -3.21953) and check_float(beta, -8.65617)):
-		print(f"You got the parameters right (Part 1), well done! (checked with tolerance {tolerance})")
+	if (check_float(mu, -1.7461520011511888) and check_float(beta, 2.553428469837263)):
+		print(f"Part 1: you got the parameters right, well done! (checked with tolerance {tolerance})")
 	else:
-		print(f"Your parameters (Part 1) are incorrect, your inverse (Part 2) won't be graded until these are right. (checked with tolerance {tolerance})")
+		print(f"Part 1: your parameters are incorrect. (checked with tolerance {tolerance})")
+		print(f"          Other parts won't be graded until these are fixed. ")
 		return 
 
 	function = glob["find_x_with_probability_p"]
 	
-	test_inputs = [(0.001, 13.50977500432694), (0.2, 0.8998147005530068), (0.9, -22.699089535951632)]
+	test_inputs = [(1 - 0.001, 15.891029744351862), (1 - 0.2, 2.0838374640878863), (1 - 0.9, -3.875794191615308)]
 	failed = []
 
 	for x, out in test_inputs:
@@ -27,23 +28,34 @@ def check_example(glob):
 			failed.append((x, out, result))
 
 	if len(failed) == 0:
-		print(f"Well done, your inverse function is correct! (checked with tolerance {tolerance})")	
+		print(f"Part 2: Well done, your inverse function is correct! (checked with tolerance {tolerance})")	
 	else:
-		print(f"Your function (Part 2) failed some tests. Keep in mind the tolerance is {tolerance}")
-		print("Failed inputs:")
+		print(f"Part 2: Your function failed some tests. Keep in mind the tolerance is {tolerance}")
+		print("    --> Failed inputs:")
 		for case in failed:
 			print(f"{case[0]} gave {case[2]}, expected {case[1]}")
+		print(f"      Other parts won't be graded until these are fixed.")
+
+	x = glob["x"]
+	if check_float(x, 15.891029744351862):
+		print(f"Part 3: you got the value of x right, well done! (checked with tolerance {tolerance})")
+	else:
+		print(f"Part 3: your value of x is incorrect. (checked with tolerance {tolerance})")
+		return 
 """
 Task 0:
 x_1 = 4
-p_e_1 = 1-.9
+p_e_1 = .1
 x_2 = 10
-p_e_2 = 1-.99
+p_e_2 = .01
 
 Task 1:
-beta = -(x_2 - x_1) / log(log(p_e_2) / log(p_e_1))
-mu = x_1 + beta * log(-log(p_e_1))
+	beta = -(x_2 - x_1) / log(log(p_2) / log(p_1))
+    mu = x_1 + beta * log(-log(p_1))
 
 Task 2:
 x = mu - beta * log(-log(p))
+
+Task 3:
+x = find_x_with_probability_p(1 - 0.001)
 """
\ No newline at end of file

book/cookbook/grading.py

@@ -4,7 +4,7 @@ from IPython.display import display
 def check(f):
 	def wrapper(*args, **kwargs):
 		output = widgets.Output()
-		button = widgets.Button(description="Check answer")
+		button = widgets.Button(description="Check Answer(s)")
 		@output.capture(clear_output=True,wait=True)
 		def _inner_check(button):
 			try: