gistfile1.py

def from_biadjacency_matrix(A,create_using=None):
    import numpy as np
    kind_to_python_type={'f':float,
                         'i':int,
                         'u':int,
                         'b':bool,
                         'c':complex,
                         'S':str,
                         'V':'void'}
    try: # Python 3.x
        blurb = chr(1245) # just to trigger the exception
        kind_to_python_type['U']=str
    except ValueError: # Python 2.6+
        kind_to_python_type['U']=unicode
    G=_prep_create_using(create_using)
    n,m=A.shape
    dt=A.dtype
    try:
        python_type=kind_to_python_type[dt.kind]
    except:
        raise TypeError("Unknown numpy data type: %s"%dt)

    # make sure we get isolated nodes
    G.add_nodes_from(range(n),part=0)
    G.add_nodes_from(range(n,n+m),part=1)

    # get a list of edges
    x,y=np.asarray(A).nonzero()

    # handle numpy constructed data type
    if python_type is 'void':
        fields=sorted([(offset,dtype,name) for name,(dtype,offset) in
                       A.dtype.fields.items()])
        for (u,v) in zip(x,y):
            attr={}
            for (offset,dtype,name),val in zip(fields,A[u,v]):
                attr[name]=kind_to_python_type[dtype.kind](val)
            G.add_edge(u,n+v,attr)
    else: # basic data type
        G.add_edges_from( ((u,n+v,{'weight':python_type(A[u,v])})
                           for (u,v) in zip(x,y)) )
    return G

Hello,
Thank you again for this funtion. However, should'nt:

G.add_nodes_from(range(n),part=0)
G.add_nodes_from(range(n,n+m),part=1) 

rather be:

G.add_nodes_from(range(n),bipartite=0)
G.add_nodes_from(range(n,n+m),bipartite=1)

Thanks,