Tests for the sqlite backend fail if floatX=float32 #1756
Description
The type conversion from numpy to sqlite seems to break for single precision floats:
Put floatX = float32 into .theanorc or THEANO_FLAGS and run the sqlite tests:
nosetests nosetests pymc3/tests/test_sqlite_backend.py
======================================================================
FAIL: test_standard_close (pymc3.tests.test_sqlite_backend.TestSQlite1dSampling)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/adr/git/pymc3/pymc3/tests/backend_fixtures.py", line 237, in test_standard_close
np.zeros(self.strace.var_shapes[varname]))
File "/usr/lib/python3.6/site-packages/numpy/testing/utils.py", line 322, in assert_equal
return assert_array_equal(actual, desired, err_msg, verbose)
File "/usr/lib/python3.6/site-packages/numpy/testing/utils.py", line 813, in assert_array_equal
verbose=verbose, header='Arrays are not equal')
File "/usr/lib/python3.6/site-packages/numpy/testing/utils.py", line 739, in assert_array_compare
raise AssertionError(msg)
AssertionError:
Arrays are not equal
(mismatch 100.0%)
x: array([b'', b''],
dtype='|S4')
y: array([ 0., 0.])