Warren Weckesser WarrenWeckesser

## data.py
"""Base class for sparse matrice with a .data attribute

    subclasses must provide a _with_data() method that
    creates a new matrix with the same sparsity pattern
    as self but with a different data array

"""

__all__ = []
	"""Base class for sparse matrice with a .data attribute

	subclasses must provide a _with_data() method that
	creates a new matrix with the same sparsity pattern
	as self but with a different data array

	"""

	__all__ = []