8000 added three more exercises · learnbyexample/TUI-apps@e7d8975 · GitHub
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added three more exercises
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‎PythonExercises/nums.txt‎

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8
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53
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3.14
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84
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73e2
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100
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2937

‎PythonExercises/questions.json‎

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"question": "Write a function that returns a dictionary sorted by values in ascending order.",
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"q_file": "dictionary_sort.py",
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"exp_op": "all tests passed\n"
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},
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"18": {
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"question": "Write a function that returns a list of string slices as per the following rules:\n\n* return the input string as the only element if its length is less than 3 characters\n* otherwise, return slices that have 2 or more characters as shown below\n\nAssume that the input string will contain only alphabets.",
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"q_file": "string_slices.py",
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"exp_op": "all tests passed\n"
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},
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"19": {
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"question": "Square even numbers and cube odd numbers. For example, `[321, 1, -4, 0, 5, 2]` should give `[33076161, 1, 16, 0, 125, 4]` as the output.",
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"q_file": "square_cube.py",
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"exp_op": "all tests passed\n"
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},
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"20": {
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"question": "The file `nums.txt` (in the current working directory) has a single column of numbers. Display the sum of these numbers (`10485.14`).",
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"q_file": "sum_column.py",
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"exp_op": "10485.14\n"
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}
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}

‎PythonExercises/questions/square_cube.py‎

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def sqr_even_cube_odd(seq):
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# add your solution here
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assert sqr_even_cube_odd([321, 1, -4, 0, 5, 2]) == [33076161, 1, 16, 0, 125, 4]
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assert sqr_even_cube_odd((2, 4, 6)) == [4, 16, 36]
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print('all tests passed')

‎PythonExercises/questions/string_slices.py‎

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def slice(s):
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# add your solution here
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assert slice('a') == ['a']
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assert slice('to') == ['to']
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assert slice('cat') == ['ca', 'cat', 'at']
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assert slice('table') == ['ta', 'tab', 'tabl', 'table', 'ab', 'abl', 'able', 'bl', 'ble', 'le']
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print('all tests passed')

‎PythonExercises/questions/sum_column.py‎

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# add your solution here

‎PythonExercises/solutions/square_cube.py‎

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def sqr_even_cube_odd(seq):
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return [n**3 if n%2 else n**2 for n in seq]
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assert sqr_even_cube_odd([321, 1, -4, 0, 5, 2]) == [33076161, 1, 16, 0, 125, 4]
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assert sqr_even_cube_odd((2, 4, 6)) == [4, 16, 36]
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print('all tests passed')

‎PythonExercises/solutions/string_slices.py‎

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def slice(s):
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c = len(s)
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if c < 3:
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return [s]
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return [s[i:j+1] for i in range(c) for j in range(i+1, c)]
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assert slice('a') == ['a']
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assert slice('to') == ['to']
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assert slice('cat') == ['ca', 'cat', 'at']
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assert slice('table') == ['ta', 'tab', 'tabl', 'table', 'ab', 'abl', 'able', 'bl', 'ble', 'le']
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print('all tests passed')

‎PythonExercises/solutions/sum_column.py‎

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total = 0
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with open('nums.txt', 'r') as f:
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for line in f:
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total += float(line)
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print(total)

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