def call_or_exc(f):
    try:
        return f()
    except Exception as e:
        return e

def truthiness(x):
    x_arr = np.array(x)
    x_sc = np.unicode_(x)
    x_sc2 = x_arr[()]
    return bool(x), bool(x_sc), bool(x_sc2), bool(x_arr), call_or_exc(lambda: x_sc.astype(bool))

def fmt(x):
    if isinstance(x, str): return repr(x).replace(r'\x00', r'\0')
    if isinstance(x, Exception): return type(x).__name__
    return repr(x)

print(' | '.join("`{}`".format(x) for x in ['x', 'bool(x)', 'bool(sc)', 'bool(arr[()])', 'bool(arr)', 'sc.astype(bool)']))
print(' | '.join(['--'] * 6))
for val in ['', '\0', ' ', ' \0', '0', '1', '\0 ', ' \0 ']:
   print(' | '.join("`{}`".format(fmt(x)) for x in (val,)+truthiness(val)))