NULL mag Issue 09 17 256 colors in python

eZine lover (@eZine)

Published in 

null magazine

 · 26 Dec 2020

the following code is from shinobi. it's a script to display all full 256 ansi colors in a terminal that supports them. perhaps using 256 colors in the bbs scene is a heresy but for making CLI apps/scripts it's awesome! thank you shinobi!

#!/usr/bin/python3 

import sys 

printable_colours=256 

sys.stdout.write(u"\u001b[2J\u001b[H") 

def print_colour(i): 
  sys.stdout.write(u"\u001b[38;5;"+str(i)+"m"+str(i).zfill(3)) 
  sys.stdout.write(u"\u001b[0m ") 

def print_run(block_begin,block_cols): 
  i=block_begin 
  for i in range(block_begin,block_begin+block_cols,1): 
    if (i<printable_colours): 
      print_colour(i) 
  sys.stdout.write(" ") 

def print_blocks(start,end,block_cols,block_rows,blocks_per_line): 
  block_length=block_cols*block_rows 
  for i in range(start,end+1,((blocks_per_line)*block_length)): 
    print("\n") # Space before each set of blocks 
    for row in range(0,block_rows,1): 
      for block in range(0,blocks_per_line,1): 
        print_run(i+(block*block_length),block_cols) 
      i+=(block_cols*1) # Prepare to print the next row 
      sys.stdout.write("\n") 

print_run(0,16) 
print_blocks(16,231,6,6,3) 
print_blocks(232,255,12,2,1) 
sys.stdout.write("\n")