tesserocr 2.7.0 is much noisier than previous versions

[asottile]

discussed a bit in #348 -- here's the separate issue

some minimal code to reproduce the problem:

import numpy
import tessdata
import tesserocr

img = numpy.zeros((20, 20))

tessapi = tesserocr.PyTessBaseAPI(
    tessdata.data_path(),
    'eng',
    psm=tesserocr.PSM.SINGLE_LINE,
)

tessapi.SetImageBytes(
    img.tobytes(),
    width=img.shape[1],
    height=img.shape[0],
    bytes_per_pixel=1,
    bytes_per_line=img.shape[0],
)
tessapi.GetUTF8Text()

prior to 2.7.0 I get no output, but after 2.7.0 I get some pretty annoying terminal spam by default:

$ python3 t.py
Bottom=0, top=20, base=0, x=0

Total count=0
Min=0.00 Really=0
Lower quartile=0.00
Median=0.00, ile(0.5)=0.00
Upper quartile=0.00
Max=0.00 Really=0
Range=1
Mean= 0.00
SD= 0.00

I also get this ~sometimes on shutdown for a different program -- but I haven't been able to make a minimal reproduction of that:

ObjectCache(0x7f12443ae1e0)::~ObjectCache(): WARNING! LEAK! object 0x5634c6dbf0e0 still has count 1 (id .../venv/share/tessdata/eng.traineddatalstm-punc-dawg)
ObjectCache(0x7f12443ae1e0)::~ObjectCache(): WARNING! LEAK! object 0x5634c6e35e40 still has count 1 (id .../venv/share/tessdata/eng.traineddatalstm-word-dawg)
ObjectCache(0x7f12443ae1e0)::~ObjectCache(): WARNING! LEAK! object 0x5634c6e579d0 still has count 1 (id .../venv/share/tessdata/eng.traineddatalstm-number-dawg)

I don't think either of these outputs should be shown by default, I prefer the 2.6.3 behaviour

there is a workaround here though ideally I wouldn't need to add this to every program using tesserocr to silence some debug-level messages

I tried using set_leptonica_log_level to silence this but as far as I can tell it's not possible to use this function?

>>> import tesserocr                
>>> tesserocr.set_leptonica_log_level(tesserocr.LeptLogLevel.ERROR)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: Argument 'level' has incorrect type (expected tesserocr.tesserocr.LeptLogLevel, got int)

and even with that function working I would then have to require my users to upgrade tesserocr to >=2.7.0