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All Samples(1)  |  Call(0)  |  Derive(0)  |  Import(1)
Find the full path to commands.

which(command, path=None, verbose=0, exts=None)
    Return the full path to the first match of the given command on the

whichall(command, path=None, verbose=0, exts=None)
    Return a list of full paths to all matches of the given command on
    the path.

src/w/e/weblogo-3.3/corebio/utils/__init__.py   weblogo(Download)
    See: http://trentm.com/projects/which/
    import _which
    if path is None :
        path = os.environ.get("COREBIOPATH", "").split(os.pathsep)