Hi all, How do I assign complex values to a sparse lil matrix The following code doesn't work from scipy import sparse from scipy.splinalg import spsolve, use_solver from numpy import linalg, ones from numpy.random import rand A = sparse.lil_matrix((3, 3),complex) A.setdiag(ones(3)+1j*ones(3)) A = A.tocsr() print A print A.real() print A.imag() The imaginary part is missing /usr/bin/python -i test_complex.py (0, 0) 1.0 (1, 1) 1.0 (2, 2) 1.0 and I get Traceback (most recent call last): File "test_complex.py", line 9, in ? print A.real() File "/usr/lib/python2.4/site-packages/scipy/sparse/csr.py", line 99, in __getattr__ return _cs_matrix.__getattr__(self, attr) File "/usr/lib/python2.4/site-packages/scipy/sparse/base.py", line 310, in __getattr__ return self._real() File "/usr/lib/python2.4/site-packages/scipy/sparse/data.py", line 30, in _real return self._with_data(numpy.real(self.data),copy=False) NameError: global name 'numpy' is not defined I am using

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import scipy scipy.__version__ '0.7.0.dev3942' import numpy numpy.__version__ '1.0.5.dev4807'