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1: Lists
2: Lists Continued
3: Lists Continued
4: Counting in Programming
5: Indexing Into Lists
6: List Length
7: List Updates
8: Appending in Python
9: Pop Values
10: Counting the Items in a List
11: No-Index Syntax
12: No-Index Syntax
13: Find an Item in a List
14: Find the Increase
15: Find Max
16: Modulo Operator in Python
17: Slicing Lists
18: List Operations - Concatenate
19: List Operations - Contains
20: List Deletion
21: Tuples
22: First Element
23: Reverse List
24: Filter Messages
25: Even Teams
26: Alchemy Ingredients
First Element
Assignment
Let's add another function to our inventory system. Write a function that returns the first element from a list. If the list is empty then return the string ERROR instead.
- main.py
- main_test.py
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def get_first_item(items):
pass
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from main import *
run_cases = [
([1, 2], 1),
(["Healing Potion"], "Healing Potion"),
([], "ERROR"),
]
submit_cases = run_cases + [
(["Iron Ore", "Iron Bar", "Scimitar"], "Iron Ore"),
(["Apple", "Banana", "Cherry"], "Apple"),
([[1, 2, 3], [4, 5, 6], [7, 8, 9]], [1, 2, 3]),
([False, True, False], False),
]
def test(input1, expected_output):
print("---------------------------------")
print(f"Input: {input1}")
result = get_first_item(input1)
print(f"Expected: {expected_output}")
print(f"Actual: {result}")
if result == expected_output:
print("Pass")
return True
print("Fail")
return False
def main():
passed = 0
failed = 0
skipped = len(submit_cases) - len(test_cases)
for test_case in test_cases:
correct = test(*test_case)
if correct:
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