Fix lint issues.

Dockerfile

@@ -4,7 +4,6 @@ WORKDIR /usr/src
 # change.
 RUN mkdir -p /root/.keras-ocr && ( \
     cd /root/.keras-ocr && \
-    curl -L -o craft_mlt_25k.pth https://www.mediafire.com/file/qh2ullnnywi320s/craft_mlt_25k.pth/file && \
     curl -L -o craft_mlt_25k.h5 https://www.mediafire.com/file/mepzf3sq7u7nve9/craft_mlt_25k.h5/file && \
     curl -L -o crnn_kurapan.h5 https://www.mediafire.com/file/pkj2p29b1f6fpil/crnn_kurapan.h5/file \
     )

Pipfile

@@ -8,18 +8,16 @@ ipython = "*"
 jupyterlab = "*"
 numpy = "*"
 matplotlib = "*"
-tensorflow = "*"
 keras = "*"
 mypy = "*"
 pylint = "*"
 pytest = "*"
 pytest-cov = "*"
 yapf = "*"
-torch = "*"
-torchvision = "*"
 scikit-learn = "*"
 sphinx = "==1.8.3"
 m2r = "==0.2.1"
+tensorflow = "==2.1.0"  # See https://github.com/PyCQA/pylint/issues/3613
 Pillow = "==6.2.2"  # We need to do this because of https://github.com/pytorch/vision/issues/1714
 sphinx_rtd_theme = "==0.4.2"
 

keras_ocr/data_generation.py

@@ -259,9 +259,9 @@ def convert_image_generator_to_recognizer_input(image_generator,
             if not line:
                 continue
             box, sentence = tools.combine_line(line)
-            
+
             # remove multiple sequential spaces
-            while ("  " in sentence):
+            while "  " in sentence:
                 sentence = sentence.replace("  ", " ")
 
             crop = tools.warpBox(image=image,

keras_ocr/detection.py

@@ -362,6 +362,7 @@ def build_keras_model(weights_path: str = None, backbone_name='vgg'):
     return model
 
 
+# pylint: disable=import-error
 def load_torch_weights(model, weights_path):
     import torch
 
@@ -400,6 +401,7 @@ def load_torch_weights(model, weights_path):
             assert layer.name in layer_names
 
 
+# pylint: disable=import-error,too-few-public-methods
 def build_torch_model(weights_path=None):
     from collections import namedtuple, OrderedDict
 

tests/test_pytorch_keras.py

@@ -3,7 +3,6 @@
 
 import numpy as np
 import pytest
-import torch
 
 import keras_ocr
 
@@ -13,9 +12,10 @@
     os.path.expanduser(os.path.join('~', '.keras-ocr', 'craft_mlt_25k.h5')))
 
 
-@pytest.mark.skipif(not keras_weights_available and torch_weights_available,
+@pytest.mark.skipif(not (keras_weights_available and torch_weights_available),
                     reason="CRAFT weights required.")
 def test_pytorch_identical_output():
+    import torch  # pylint: disable=import-outside-toplevel
     weights_path_torch = keras_ocr.tools.download_and_verify(
         url='https://www.mediafire.com/file/qh2ullnnywi320s/craft_mlt_25k.pth/file',
         filename='craft_mlt_25k.pth',