Traceback (most recent call last):


 "numexpr/tests/test_numexpr.py", line 1011, in method

return func()


 "numexpr/tests/test_numexpr.py", line 572, in method

npval = eval(expr, globals(), this_locals)


 "<string>", line 1, in <module>
ValueError: Integers to negative integer powers are not allowed.

Traceback (most recent call last):


 "/home/ubuntu/ML/venv/lib/python3.5/site-packages/sklearn/externals/joblib/_parallel_backends.py", line 350, in __call__

return self.func(*args, **kwargs)


 "/home/ubuntu/ML/venv/lib/python3.5/site-packages/sklearn/externals/joblib/parallel.py", line 131, in __call__

return [func(*args, **kwargs) for func, args, kwargs in self.items]


 "/home/ubuntu/ML/venv/lib/python3.5/site-packages/sklearn/externals/joblib/parallel.py", line 131, in <listcomp>

return [func(*args, **kwargs) for func, args, kwargs in self.items]


 "/home/ubuntu/ML/venv/lib/python3.5/site-packages/sklearn/metrics/pairwise.py", line 223, in euclidean_distances

X, Y = check_pairwise_arrays(X, Y)


 "/home/ubuntu/ML/venv/lib/python3.5/site-packages/sklearn/metrics/pairwise.py", line 110, in check_pairwise_arrays

warn_on_dtype=warn_on_dtype, estimator=estimator)


 "/home/ubuntu/ML/venv/lib/python3.5/site-packages/sklearn/utils/validation.py", line 431, in check_array

force_all_finite)


 "/home/ubuntu/ML/venv/lib/python3.5/site-packages/sklearn/utils/validation.py", line 296, in _ensure_sparse_format

spmatrix = spmatrix.astype(dtype)


 "/home/ubuntu/ML/venv/lib/python3.5/site-packages/scipy/sparse/data.py", line 71, in astype

self._deduped_data().astype(dtype, casting=casting, copy=copy),


 "/home/ubuntu/ML/venv/lib/python3.5/site-packages/scipy/sparse/data.py", line 34, in _deduped_data

self.sum_duplicates()


 "/home/ubuntu/ML/venv/lib/python3.5/site-packages/scipy/sparse/compressed.py", line 1009, in sum_duplicates

self.sort_indices()


 "/home/ubuntu/ML/venv/lib/python3.5/site-packages/scipy/sparse/compressed.py", line 1055, in sort_indices

self.indices, self.data)
ValueError: WRITEBACKIFCOPY base is read-only
