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Diffstat (limited to 'challenge-101/tyler-wardhaugh/python/ch-1.py')
| -rwxr-xr-x | challenge-101/tyler-wardhaugh/python/ch-1.py | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/challenge-101/tyler-wardhaugh/python/ch-1.py b/challenge-101/tyler-wardhaugh/python/ch-1.py new file mode 100755 index 0000000000..963f7ef319 --- /dev/null +++ b/challenge-101/tyler-wardhaugh/python/ch-1.py @@ -0,0 +1,74 @@ +#!/usr/bin/env python3 +"""Challenge 101, Task 1""" + +import sys + + +DEFAULT_INPUT = [1, 2, 3, 4] + + +def print_matrix(mat, colsep=' '): + """Pretty print a matrix (list of lists)""" + strs = [[str(x) for x in row] for row in mat] + lens = [max(len(x) for x in col) for col in zip(*strs)] + fmt = colsep.join(f'{{:{x}}}' for x in lens) + tbl = (fmt.format(*row) for row in strs) + + for row in tbl: + print(row) + + +def get_min_size(coll_len): + """Determine the minimum shape necessary for a matrix to hold len items.""" + f = lambda x: abs(x - coll_len // x) + candidates = {x: f(x) for x in range(1, 1+coll_len) if coll_len % x == 0} + + rows = min(candidates, key=candidates.get) + cols = coll_len // rows + return rows, cols + + +def rotate_matrix(mat): + """Rotate the matrix counterclockwise""" + rotated_mat = [list(x) for x in zip(*mat)] + rotated_mat.reverse() + return rotated_mat + + + +def _pack(coll, m, n): + """Recursively pack an incoming coll into an m x n spiral matrix. This is a + helper function for pack_spiral, not meant to be called directly.""" + if m == 1: + yield [coll] + elif n == 1: + yield from ([x] for x in reversed(coll)) + else: + result = rotate_matrix(list(_pack(coll[n:], n, m-1))) + [coll[:n]] + yield from result + + +def pack_spiral(coll): + """Return coll as a packed spiral matrix.""" + m, n = get_min_size(len(coll)) + spiral = list(_pack(coll, m, n)) + return spiral + + +def main(args=None): + """Run the task""" + if args is None: + args = sys.argv[1:] + + coll = None + if args: + import json + coll = json.loads(args[0]) + else: + coll = DEFAULT_INPUT + + print_matrix(pack_spiral(coll)) + + +if __name__ == '__main__': + sys.exit(main()) |
