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42 lines
1.1 KiB
Python
42 lines
1.1 KiB
Python
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"""
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Find median of a list of numbers.
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Read more about medians:
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https://en.wikipedia.org/wiki/Median
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"""
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def median(nums):
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"""Find median of a list of numbers."""
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# Sort list
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sorted_list = sorted(nums)
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print("List of numbers:")
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print(sorted_list)
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# Is number of items in list even?
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if len(sorted_list) % 2 == 0:
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# Find index for first middle value.
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mid_index_1 = len(sorted_list) / 2
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# Find index for second middle value.
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mid_index_2 = -(len(sorted_list) / 2) - 1
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# Divide middle values by 2 to get average (mean).
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med = (sorted_list[mid_index_1] + sorted_list[mid_index_2]) / float(2)
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return med # Return makes `else:` unnecessary.
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# Number of items is odd.
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mid_index = (len(sorted_list) - 1) / 2
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# Middle index is median.
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med = sorted_list[mid_index]
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return med
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def main():
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"""Call average module to find median of a specific list of numbers."""
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print("Odd number of numbers:")
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print(median([2, 4, 6, 8, 20, 50, 70]))
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print("Even number of numbers:")
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print(median([2, 4, 6, 8, 20, 50]))
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if __name__ == '__main__':
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main()
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