Read graphs in LEDA format.
LEDA is a C++ class library for efficient data types and algorithms.
See http://www.algorithmic-solutions.info/leda_guide/graphs/leda_native_graph_fileformat.html
| read_leda(path[, encoding]) | Read graph in LEDA format from path. |
| parse_leda(lines) | Read graph in LEDA format from string or iterable. |