01-midterm test

Question 1: Quadrant [7/20]

Write a function quadrant(angle) that returns the quadrant that an angle in degrees (or its equivalent angle in the range -180 to 180) is in.

An angle, in degrees, can have any whole number multiple of 360 added or subtracted to it and it will still be equivalently the same angle.

For an angle (or equivalent angle) between -180 and 180 (including 180 and excluding -180) i.e. -180 < angle <= 180 , we say that the angle is in:

• Quadrant 1, if 0 <= angle <= 90；
• Quadrant 2, if 90 < angle <= 180；
• Quadrant 3, if -180 < angle < -90；
• Quadrant 4, if -90 <= angle < 0；

Examples:

• quadrant(0) should return 1.
• quadrant(360) should also return 1, as an angle of 360 is equivalent to an angle of 360-1*360=0.
• quadrant(180) should return 2.
• quadrant(-180) should also return 2, as -180 is excluded from quadrant 3 and as an angle of -180 is equivalent to an angle of -180+1*360=180 and 180 is included in quadrant 2.
• quadrant(135) should return 2.

You can (additionally) assume:

• You can assume the parameter is of type int.

Other requirements:

• The function that you write must be named quadrant and it must have exactly one parameter.
• The function must return an int.

A scaffold file quadrant.py is provided in Ed and for download via link at the bottom. You must write your solution into the copy of this file in Ed (or upload or transfer your solution into it if working outside of Ed). You must not change the name of the file in Ed.

Your solution will be marked on functionality only (no code quality considered). To be fully functional means that it returns the correct value for all valid arguments. You are not required to check that arguments your function is called with are valid. A non-comprehensive set of minimal basic tests is provided, you can test your code on this set of tests by either clicking the "Test" button (on Ed) or by calling the function test_quadrant in the provided scaffold file in a console (on Ed or in an IDE). Passing the provided test set does not prove that your solution is fully correct. Code that does not pass the provided test set (or equivalent) will receive zero marks however. Code that does not run (for example, due to syntax errors), that violates the format instructions, or that fails every test case will also receive zero marks.

def quadrant(angle):
    pass

def test_quadrant():
    assert quadrant(0) == 1
    assert quadrant(360) == 1
    assert quadrant(180) == 2
    assert quadrant(-180) == 2
    assert quadrant(135) == 2
    assert quadrant(-45) == 4
    assert quadrant(-100) == 3
    print("All tests in provided minimal set of basic tests passed")
    print("Reminder: Passing the provided test set does not prove that your function is fully correct")

Question 2: Count differences [7/20]

Write a function count_diff(seq1, seq2) that takes as input two lists of numbers with the same length, and returns how many elements in the same position that are different between two lists.

Examples:

• count_diff([1, 5, 3, 7, 8], [1, 2, 3, 4, 8]) should return 2, because elements at index 1 are different between the two lists (value 5 in the first list and 2 in the second list) and elements at index 3 are also different (7 in the first list and 4 in the second list). All other elements (at indices 0, 2, 4) are the same.
• count_diff([1], [1]) should return 0, as there are no different elements.
• count_diff([],[]) should return 0, as there is no different element.

You can (additionally) assume:

• You can assume that both parameters are of type list, and that they have the same length.
• You can assume that all elements in both lists are numbers, of type int or float.

Other requirements:

• The function that you write must be named count_diff and it must have a two parameters.
• The function must return an int.

A scaffold file count_diff.py is provided in Ed and for download via link at the bottom. You must write your solution into the copy of this file in Ed (or upload or transfer your solution into it if working outside of Ed). You must not change the name of the file in Ed.

Your solution will be marked on functionality only (no code quality considered). To be fully functional means that it returns the correct value for all valid arguments. You are not required to check that arguments your function is called with are valid. A non-comprehensive set of minimal basic tests is provided, you can test your code on this set of tests by either clicking the "Test" button (on Ed) or by calling the function test_count_diff in the provided scaffold file in a console (on Ed or in an IDE). Passing the provided test set does not prove that your solution is fully correct. Code that does not pass the provided test set (or equivalent) will receive zero marks however. Code that does not run (for example, due to syntax errors), that violates the format instructions, or that fails every test case will also receive zero marks.

def count_diff(seq1, seq2):
    pass


def test_count_diff():
    assert count_diff([1, 5, 3, 7, 8], [1, 2, 3, 4, 8]) == 2
    assert count_diff([1], [1]) == 0
    assert count_diff([2], [3]) == 1
    assert count_diff([],[]) == 0
    print("All tests in provided minimal set of basic tests passed")
    print("Reminder: Passing the provided test set does not prove that your function is fully correct")

Question 3: Decode String [6/20]

An encoded string is a string consisting of zero or more encoded parts, which are two character long substrings which do not overlap. Each encoded part consists of exactly one digit 'k' (between '0' and '9') followed by exactly one non-digit character.

Each encoded part corresponds to a decoded part which is a string consisting of exactly k repeats of the non-digit second character in the encoded part.

Write a function decode(encoded_string) which takes an encoded string encoded_string and returns the corresponding decoded string, which is just the encoded string with each encoded part replaced by their corresponding decoded part (order of parts in the string should be preserved).

Examples:

• decode("3a") should return "aaa"
• decode("2x2y") should return "xxyy”
• decode("3a0b9c") should return "aaaccccccccc”

You can (additionally) assume:

• The parameter encoded_string is of type str

Other requirements:

• The function that you write must be named decode and it must have a single parameter.
• The function must return a str.

A scaffold file decode.py is provided in Ed and for download via link at the bottom. You must write your solution into the copy of this file in Ed (or upload or transfer your solution into it if working outside of Ed). You must not change the name of the file in Ed.

Your solution will be marked on functionality only (no code quality considered). To be fully functional means that it returns the correct value for all valid arguments. You are not required to check that arguments your function is called with are valid. A non-comprehensive set of minimal basic tests is provided, you can test your code on this set of tests by either clicking the "Test" button (on Ed) or by calling the function test_decode in the provided scaffold file in a console (on Ed or in an IDE). Passing the provided test set does not prove that your solution is fully correct. Code that does not pass the provided test set (or equivalent) will receive zero marks however. Code that does not run (for example, due to syntax errors), that violates the format instructions, or that fails every test case will also receive zero marks.

def decode(encoded_string):
    pass

def test_decode():
    assert decode("3a") == "aaa"
    assert decode("2x2y") == "xxyy"
    assert decode("3a0b9c") == "aaaccccccccc"
    assert decode("") == ""
    print("All tests in provided minimal set of basic tests passed")
    print("Reminder: Passing the provided test set does not prove that your function is fully correct")

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