Terry Reedy wrote: > "CC" <[EMAIL PROTECTED]> wrote in message > news:[EMAIL PROTECTED] >> I wanna compile a 6000x1000 array with python. The array starts from >> 'empty', each time I get a 6000 length list, I wanna add it to the >> exist array as a column vector. Is there any function to do so? >> >> Or, I can add the list as a rows, if this is easier, and transpose the >> whole array after all the rows are setup. > > Python does not come with a 2D array type either as a builtin type or as a > standard library module. You can only simulate one with a sequence of > sequences (list of lists, for instance). You could initialize as follows: > > aray = [] > for l6000 in source(): aray.append(l6000) > > While this will print as a list of rows, you are free to think of it as a > list of columns. > > That said, I suspect you should use the 3rd party NumPy package which > defines multiple-dimensional arrays of several base types. > > Terry Jan Reedy > > > If you're just looking for a multi-dimensional array type, and don't need maximum speed or the vast range of array-processing that numpy offers, then *pyarray* provides a pure-python single module solution.
the latest pyarray is available with tests and documentation at: http://svn.brownspencer.com/pyarray/trunk/ Introduction ============ pyarray is a pure-Python implementation of a multi-dimensional array type. pyarray.ListView and pyarray.ArrayView offer a substantial subset of numpy.ArrayType functionality, by wrapping standard python 'list' and 'array.array' respectively. Key features include: * Views: all subscripting operations apart from individual cell access access return views to existing 'live' data * Extended Indexing: slicing, arbitrary 'takes', index arrays etc... * Unlimited re-shaping: while still addressing one data-source * Elementwise binary operations: all basic arithmetic and comparison operations * Data broadcasting: allows assignment and binary operations between views of different shapes * Friendly __repr__: work safely with big arrays at the interactive prompt Regards Michael -- http://mail.python.org/mailman/listinfo/python-list
