Daily Programmer #171 Easy/Intermediate

Easy output

xxxxxxxx
x      x
x xxxx x
x x  x x
x x  x x
x xxxx x
x      x
xxxxxxxx

---

x x x x 
 x x x x
x x x x 
 x x x x
x x x x 
 x x x x
x x x x 
 x x x x

---

  xxxxx 
 xxxxxxx
xxxxxx  
xxxxx   
xxxxx   
xxxxxx  
 xxxxxxx
  xxxxx 

---

x  x  xx
x  x  xx
x  x  xx
xxxx  xx
xxxx  xx
x  x  xx
x  x  xx
x  x  xx

---

Intermediate output

                
                
  xxxxxxxxxxxx  
  xxxxxxxxxxxx  
  xx        xx  
  xx        xx  
  xx  xxxx  xx  
  xx  xxxx  xx  
  xx  xxxx  xx  
  xx  xxxx  xx  
  xx        xx  
  xx        xx  
  xxxxxxxxxxxx  
  xxxxxxxxxxxx  
                
                

---

xx  xx  xx  xx  
xx  xx  xx  xx  
  xx  xx  xx  xx
  xx  xx  xx  xx
xx  xx  xx  xx  
xx  xx  xx  xx  
  xx  xx  xx  xx
  xx  xx  xx  xx
xx  xx  xx  xx  
xx  xx  xx  xx  
  xx  xx  xx  xx
  xx  xx  xx  xx
xx  xx  xx  xx  
xx  xx  xx  xx  
  xx  xx  xx  xx
  xx  xx  xx  xx

---

xxxx        xxxx
xxxx        xxxx
xx            xx
xx            xx
                
                
                
                
                
                
      xxxx      
      xxxx      
    xxxxxxxx    
    xxxxxxxx    
xx  xxxxxxxx  xx
xx  xxxxxxxx  xx

---

                
                
xxxxxx    xxxxxx
xxxxxx    xxxxxx
xxxxxx    xxxxxx
xxxxxx    xxxxxx
                
                
xxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxx
                
                
                
                

---

read.py

import numpy as np

_format = np.vectorize('{:08b}'.format)
_getitem = np.vectorize(str.__getitem__)
def make_image(data):
    numbers = np.frombuffer(data.replace(' ', '').decode('hex'), dtype=np.uint8)
    binary_digits = _format(numbers)
    replicated_digits = np.fromfunction(lambda x, y: binary_digits[x], binary_digits.shape * 2, dtype=int)
    selected_digits = _getitem(replicated_digits, range(8))
    return selected_digits == '1'

def display_image(image):
    cols, rows = image.shape
    return '\n'.join(''.join('x' if image[row, col] else ' ' for col in range(cols)) for row in range(rows))

if __name__ == '__main__':
    for img in ['FF 81 BD A5 A5 BD 81 FF', 'AA 55 AA 55 AA 55 AA 55', '3E 7F FC F8 F8 FC 7F 3E', '93 93 93 F3 F3 93 93 93']:
        print display_image(make_image(img))
        print
        print '---'
        print

transform.py

from read import *

def rotate_clockwise(image):
    return np.rot90(image, -1)

def rotate_counterclockwise(image):
    return np.rot90(image)
    
def zoom_in(image):
    return np.repeat(np.repeat(image, 2, 0), 2, 1)

def zoom_out(image):
    return image[::2,::2]

def invert(image):
    return ~image

if __name__ == '__main__':
    for img in ['FF 81 BD A5 A5 BD 81 FF', 'AA 55 AA 55 AA 55 AA 55', '3E 7F FC F8 F8 FC 7F 3E', '93 93 93 F3 F3 93 93 93']:
        print display_image(zoom_out(invert(zoom_in(rotate_clockwise(zoom_in(make_image(img)))))))
        print
        print '---'
        print