Exercises for Ch 6 - 10

Author: deltavat

06-flow-control/exercise-1.py

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+# To what values do the following expressions evaluate?
+
+False or (True and False)	# False
+True or (1 + 2)				# True
+(1 + 2) or True				# 3
+True and (1 + 2)				# 3
+False and (1 + 2)			# Flase
+(1 + 2) and True			# True
+(32 * 4) >= 129				# False
+False != (not True)			# False
+True == 4					# False
+False == (847 == '847')		# True

06-flow-control/exercise-2.py

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+# Write a function, even_or_odd, that determines whether its argument is an even or odd number. If it's even, the function should print 'even'; otherwise, it should print 'odd'. Assume the argument is always an integer.
+
+def even_or_odd(number):
+	if number % 2 == 0:
+		print('Even')
+	else:
+		print('Odd')
+
+even_or_odd(3)

06-flow-control/exercise-3.py

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+# Without running the following code, what does it print? Why?
+
+def bar_code_scanner(serial):
+	match serial:
+		case '123':
+			print('Product1')
+		case '113':
+			print('Product2')
+		case '142':
+			print('Product3')
+		case _:
+			print('Product not found!')
+			
+bar_code_scanner('113')
+bar_code_scanner(142)
+
+# It will print 'Product2' for '113' and 'Product not found!' for 142, as 142 integer doesn't match the string'142' defined in the program.

06-flow-control/exercise-4.py

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+# Refactor this code to use a regular if statement instead.
+
+#	def baz():
+#		return ('bar' if foo() else qux())
+
+def baz():
+	if foo():
+		return 'bar'
+	else:
+		return qux()

06-flow-control/exercise-5.py

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+# What does this code output, and why?
+
+def is_list_empty(my_list):
+	if my_list:
+		print('Not Empty')
+	else:
+		print('Empty')
+		
+is_list_empty([])
+
+# It outputs Empty due to a falsy empty list.

06-flow-control/exercise-6.py

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+# Write a function that takes a string as an argument and returns an all-caps version of the string when the string is longer than 10 characters. Otherwise, it should return the original string. Example: change 'hello world' to 'HELLO WORLD', but don't change 'goodbye'.
+
+def caps(word):
+	return word.upper() if len(word) > 10 else word
+
+print(caps('hello world'))
+print(caps('goodbye'))

06-flow-control/exercise-7.py

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+def number_range(number):
+	if number < 0:
+		print(f'{number} is less than 0')
+	elif 0 <= number <= 50:
+		print(f'{number} is between 0 and 50')
+	elif 51 <= number <= 100:
+		print(f'{number} is between 51 and 100')
+	else:
+		print(f'{number} is greater than 100')
+
+number_range(101)

07-intro-to-collections/exercise-1.py

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+# If you have a list named people, how can you determine the number of entries in that list?
+
+people = ['elon', 'jeff', 'sam']
+
+print(len(people))

07-intro-to-collections/exercise-10.py

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+# Bob expects the following code to print the names in alphabetical order. Without running the code, can you say whether it will? Explain your answer.
+
+names = { 'Chris', 'Clare', 'Karis', 'Karl',
+					'Max', 'Nick', 'Victor' }
+print(names)
+
+# sets being unordered collections, it wont always be in an alphabetical order.

07-intro-to-collections/exercise-11.py

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+#	Consider the data in the following table:
+#	
+#	Name		Country
+#	Alice		USA
+#	Francois	Canada
+#	Inti		Peru
+#	Monika		Germany
+#	Sanyu		Uganda
+#	Yoshitaka	Japan
+#	
+#	You need to write some Python code to determine the country name associated with one of the listed names. Your code should include the data structure(s) you need and at least one test case to ensure the code works.
+
+places = {
+	'Alice': 'USA',
+	'Francois': 'Canada',
+	'Inti': 'Peru',
+	'Monika': 'Germany',
+	'Sanyu': 'Uganda',
+	'Yoshitaka': 'Japan',
+}
+
+print(places['Inti'])