enclose! clear solution for List Beautify by veky - python coding challenges

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enclose! solution in Clear category for List Beautify by veky

def list_beautify(data):
    def enclose(inside, data): return inside.join(data).join('[]')
    widths = [str(max(len(str(number)) for number in column)) for column in zip(*data)]
    return enclose(',\n ', [enclose(', ', map(format, row, widths)) for row in data])

March 24, 2023

Comments:

mennadiego on Nov. 19, 2023, 8:20 a.m.
This exercise is really too hard for me. Your solution is fascinating

veky on Nov. 19, 2023, 8:10 p.m.
Is there anything I can clarify? Do you understand how it works?

mennadiego on Nov. 19, 2023, 8:56 p.m.
Thanks! Your solution is deeper than my brain could analyse it. Sorry for the English, I'm Italian. I have some idea about how it works and I suppose it involves recursion. But I think I have not the capacity to abstract all that dense code. I appreciate if you could explain the code section by section. I already know list comprehension. Many thanks.

veky on Nov. 20, 2023, 6:10 a.m.
No, it doesn't involve recursion. <pre class='brush: python'>def enclose(inside, data): return inside.join(data).join('[]') </pre> First we define an auxilliary function that formats an iterable with a given separator between its elements. Try calling <pre class='brush: python'>enclose('|', 'We are learning Python'.split())</pre> and see if you understand it. <pre class='brush: python'>widths = [str(max(len(str(number)) for number in column)) for column in zip(*data)] </pre> Then we define list of column widths, by transposing data into columns (do you understand what zip(*data) does?) and calculating the maximum length of all the numbers in each particular column. <pre class='brush: python'>return enclose(',\n ', [enclose(', ', map(format, row, widths)) for row in data]) </pre> And at the end, we format each cell according to the calculated width of its column, enclose each row with comma as a separator, and then we enclose the whole matrix with comma + newline + space as a separator. <hr /> I have absolutely no problem explaining further, but you'll have to ask more specific questions.

List, list and list again

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