Pictorially visualise numpy boolean array with strings

Question

Say you have a 2D numpy array of bools, array:

[[ True  True  True  True  True  True]
 [ True  False False False False True]
 [ True  True  True  True  True  True]]

And you wish to represent them pictorially with ██ replacing the True values and whitespace for the False values:

  ██████████████
  ██          ██
  ██████████████

I've spent too much time with the chararray to no avail trying things like:

chars = np.chararrray(array.shape, unicode=True)
chars[array] = '██'

Answer 1

Your suggested solution works, only need to print it nicer:

chars = np.chararray(array.shape, unicode=True)
chars[array] = '██'
print(np.array2string(chars, separator='', formatter={'str_kind': lambda x: x if x else ' '}))

I am not sure if you want to get rid of the brackets or not though.

output:

[[██████]
 [█    █]
 [██████]]

In case you wanted without brackets (disclaimer: this is lazy replacement, you probably can do a better job removing them):

print(np.array2string(chars, separator='', formatter={'str_kind': lambda x: x if x else ' '}).replace(" [","").replace("[","").replace("]",""))

██████
█    █
██████