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#!/usr/bin/env python3
###########################################################################
# script name: ch-1.py #
# #
# https://github.com/user-person #
# #
# https://perlweeklychallenge.org/blog/perl-weekly-challenge-053/ #
# #
# Rotate Matrix #
# Write a script to rotate the followin matrix by given 90/180/270 #
# degrees clockwise. #
# #
# [ 1, 2, 3 ] #
# [ 4, 5, 6 ] #
# [ 7, 8, 9 ] #
# #
# For example, if you rotate by 90 degrees then expected result should #
# be like below #
# #
# [ 7, 4, 1 ] #
# [ 8, 5, 2 ] #
# [ 9, 6, 3 ] #
# #
###########################################################################
from itertools import chain
import os
import re
import sys
matrix = [[1,2,3],
[4,5,6],
[7,8,9]];
#______________________________________
# 0 start | 90 | 180 | 270 |
# 1 [0][0] | [0][2] | [2][2] | [2][0] |
# 2 [0][1] | [1][2] | [2][1] | [1][0] |
# 3 [0][2] | [2][2] | [2][0] | [0][0] |
# 4 [1][0] | [0][1] | [1][2] | [2][1] |
# 5 [1][1] | [1][1] | [1][1] | [1][1] |
# 6 [1][2] | [2][1] | [1][0] | [0][1] |
# 7 [2][0] | [0][0] | [0][2] | [2][2] |
# 8 [2][1] | [1][0] | [0][1] | [1][2] |
# 9 [2][2] | [2][0] | [0][0] | [0][2] |
#__________|________|________|________|
# inner outer
# 0 row 0 + col 0 +
# 90 col 2 - row 0 +
# 180 row 2 - col 2 -
# 270 col 2 - row 0 +
width = 0
rawNums = []
rawNums = list(chain.from_iterable(matrix))
w = 1
while w**2 <= len(rawNums):
if w**2 == len(rawNums):
width = w
loop = False
w += 1
#scriptName = os.path.basename(sys.argv[0])
errorString = os.path.basename(sys.argv[0]) + ' requires a command-line argument. There are modes for 0, 90, 180, and 270 degree rotations.\n'
if not len(sys.argv[1:]):
sys.stderr.write(errorString)
exit(1)
deg = sys.argv[1]
if not re.search(r'\A[012789]+\Z',deg):
sys.stderr.write(errorString)
exit(1)
deg = int(deg)
if not (deg == 0 or deg == 90 or deg == 180 or deg == 270):
sys.stderr.write('Invalid choice. There are modes for 0, 90, 180, and 270 degrees.\n')
exit(1)
newMatrix = arr = [[0 for i in range(width)] for j in range(width)]
i = 0
if deg == 0:
for j in range(width):
for k in range(width):
# print('j: ', j,'k: ', k,'i: ', i,'rawNums[i]: ', rawNums[i])
newMatrix[j][k] = rawNums[i]
i += 1
elif deg == 90:
for j in range(width-1, -1, -1):
for k in range(width):
newMatrix[k][j] = rawNums[i]
i += 1
elif deg == 180:
for j in range(width-1, -1, -1):
for k in range(width-1, -1, -1):
newMatrix[j][k] = rawNums[i]
i += 1
elif deg == 270:
for j in range(width):
for k in range(width-1, -1, -1):
newMatrix[k][j] = rawNums[i]
i += 1
[print(whoa) for whoa in newMatrix]
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