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You can easily turn your list of tuples into a matrix as follows:

sage: matrix(RDF, ver1)                                                                                                                                                                                      
[  0.0   0.5  0.75]
[  0.0  -0.5  0.75]
[  0.5  0.75   0.0]
[  0.5 -0.75   0.0]