Add support for pytables (so pandas can r/w h5 files)

https://b/242704740

Dockerfile.tmpl

@@ -513,6 +513,7 @@ RUN pip install flashtext && \
  pip install ipympl==0.7.0 && \
  pip install pandarallel && \
  pip install onnx && \
+ pip install tables && \
  /tmp/clean-layer.sh
 
 # Download base easyocr models.

test_pytables.py

@@ -0,0 +1,13 @@
+import unittest
+
+import pandas as pd
+from pandas.testing import assert_frame_equal
+
+
+class TestPandasPytables(unittest.TestCase):
+
+ def test_rw_hd5(self):
+ want = pd.DataFrame([[1, 1.0, 'a']], columns=['x', 'y', 'z'])
+ want.to_hdf('./want.h5', 'data')
+ got = pd.read_hdf('./want.h5')
+ assert_frame_equal(want, got)