neutralize non-visible ASCII characters for printing ASCII table

Question

I'm trying to write a short script (for a tutorial) to show which of the first 128 ASCII characters are printable, recognizable characters.

The following script using `is in string.printable' partially works, but is still triggering off of things like line feeds, etc.

Is there one or two more lines I can add to trap and replace these control characters with spaces so that the table looks nice and shows printable characters?

Written out longhand for noob-readability:

import string
lines = []
for i in range(8):
    line = []
    for j in range(16):
        k = i + j *16
        thing = chr(k)
        if thing not in string.printable:
            thing = ' '
        line.append(thing)
    lines.append(line)

for line in lines:
    print "".join(line)

IDLE:

Copy/paste into SE including four spaces:

   0@P`p
  !1AQaq
  "2BRbr
  #3CScs
  $4DTdt
  %5EUeu
  &6FVfv
  '7GWgw
  (8HXhx
         )9IYiy

 *:JZjz
 +;K[k{
 ,<L\l|

-=M]m} .>N^n~ /?O_o

Answer 1

Updated code to replace unprintable characters as per OP's comment.

from string import printable, whitespace

replace_ch = ' '  # The character to replace non-printable characters with
whitespace_ch = ' '  # The character to replace whitespace characters with

# For console output
out_width = 8
out_height = 16

chars = [chr(i) for i in range(128)]
# Replace whitespace characters
chars = [whitespace_ch if c in whitespace else c for c in chars]
# Replace non-printable characters
chars = [c if c in printable else replace_ch for c in chars]
# Form lines for printing
lines = [[chars[i + j * out_height] for j in range(out_width)] for i in range(out_height)]

for line in lines:
    print(''.join(line))

Outputs:

   0@P`p
  !1AQaq
  "2BRbr
  #3CScs
  $4DTdt
  %5EUeu
  &6FVfv
  '7GWgw
  (8HXhx
  )9IYiy
  *:JZjz
  +;K[k{
  ,<L\l|
  -=M]m}
  .>N^n~
  /?O_o

An alternative is to simply avoid the first 32 characters of ASCII as they are defined as control characters. It may be more efficient to check the ord(c) of a character, c.