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95 lines
1.8 KiB
Python
95 lines
1.8 KiB
Python
"""Absolute Value."""
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def abs_val(num: float) -> float:
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"""
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Find the absolute value of a number.
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>>> abs_val(-5.1)
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5.1
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>>> abs_val(-5) == abs_val(5)
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True
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>>> abs_val(0)
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0
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"""
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return -num if num < 0 else num
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def abs_min(x: list[int]) -> int:
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"""
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>>> abs_min([0,5,1,11])
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0
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>>> abs_min([3,-10,-2])
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-2
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>>> abs_min([])
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Traceback (most recent call last):
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...
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ValueError: abs_min() arg is an empty sequence
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"""
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if len(x) == 0:
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raise ValueError("abs_min() arg is an empty sequence")
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j = x[0]
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for i in x:
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if abs_val(i) < abs_val(j):
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j = i
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return j
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def abs_max(x: list[int]) -> int:
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"""
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>>> abs_max([0,5,1,11])
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11
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>>> abs_max([3,-10,-2])
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-10
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>>> abs_max([])
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Traceback (most recent call last):
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...
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ValueError: abs_max() arg is an empty sequence
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"""
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if len(x) == 0:
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raise ValueError("abs_max() arg is an empty sequence")
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j = x[0]
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for i in x:
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if abs(i) > abs(j):
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j = i
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return j
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def abs_max_sort(x: list[int]) -> int:
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"""
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>>> abs_max_sort([0,5,1,11])
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11
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>>> abs_max_sort([3,-10,-2])
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-10
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>>> abs_max_sort([])
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Traceback (most recent call last):
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...
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ValueError: abs_max_sort() arg is an empty sequence
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"""
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if len(x) == 0:
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raise ValueError("abs_max_sort() arg is an empty sequence")
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return sorted(x, key=abs)[-1]
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def test_abs_val():
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"""
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>>> test_abs_val()
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"""
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assert abs_val(0) == 0
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assert abs_val(34) == 34
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assert abs_val(-100000000000) == 100000000000
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a = [-3, -1, 2, -11]
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assert abs_max(a) == -11
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assert abs_max_sort(a) == -11
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assert abs_min(a) == -1
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if __name__ == "__main__":
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import doctest
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doctest.testmod()
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test_abs_val()
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print(abs_val(-34)) # --> 34
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