ó ŸÃÒYc@sÙdZddlZddlmZddlmZmZddlm Z m Z m Z m Z dddd gZ d „Zed d d ƒd„ƒZedƒded„ƒZedd dƒded„ƒZd„ZdS(sOFunctions for reading and writing graphs in the *sparse6* format. The *sparse6* file format is a space-efficient format for large sparse graphs. For small graphs or large dense graphs, use the *graph6* file format. For more information, see the `sparse6`_ homepage. .. _sparse6: http://users.cecs.anu.edu.au/~bdm/data/formats.html iÿÿÿÿN(t NetworkXError(t open_filetnot_implemented_for(tdata_to_graph6tgraph6_to_datat data_to_nt n_to_datat read_sparse6t parse_sparse6tgenerate_sparse6t write_sparse6cse|jdƒr|d}n|jdƒs:tdƒ‚ntt|dƒƒ\}‰d‰xdˆ>|kr|ˆd7‰q_W‡‡fd†}d}tjƒ}|jt|ƒƒt}xŒ|ƒD]\}}|dkré|d7}n||ks||krPqÄ||kr|}qÄ|j ||ƒr5t }n|j ||ƒqÄW|satj |ƒ}n|S(saRead an undirected graph in sparse6 format from string. Parameters ---------- string : string Data in sparse6 format Returns ------- G : Graph Raises ------ NetworkXError If the string is unable to be parsed in sparse6 format Examples -------- >>> G = nx.parse_sparse6(':A_') >>> sorted(G.edges()) [(0, 1), (0, 1), (0, 1)] See Also -------- generate_sparse6, read_sparse6, write_sparse6 References ---------- .. [1] Sparse6 specification s >>sparse6<d@}|}x:|ˆkr¨t|ƒ}d}|d>|}|d7}qoW||ˆ?}|ˆ}||fVqWdS(s5Return stream of pairs b[i], x[i] for sparse6 format.iiiN(titertNonetnext(tchunkstdtdLentbtxtxLen(tdatatk(sp/private/var/folders/w6/vb91730s7bb1k90y_rnhql1dhvdd44/T/pip-build-w4MwvS/networkx/networkx/readwrite/sparse6.pyt parseDataKs&       i( t startswithRRRtnxt MultiGraphtadd_nodes_fromtrangetFalsethas_edgetTruetadd_edgetGraph(tstringtnRtvtGt multigraphRR((RRsp/private/var/folders/w6/vb91730s7bb1k90y_rnhql1dhvdd44/T/pip-build-w4MwvS/networkx/networkx/readwrite/sparse6.pyR!s4!       itmodetrtcCsjg}x?|D]7}|jƒ}t|ƒs1q n|jt|ƒƒq Wt|ƒdkrb|dS|SdS(sRead an undirected graph in sparse6 format from path. Parameters ---------- path : file or string File or filename to write. Returns ------- G : Graph/Multigraph or list of Graphs/MultiGraphs If the file contains multple lines then a list of graphs is returned Raises ------ NetworkXError If the string is unable to be parsed in sparse6 format Examples -------- >>> nx.write_sparse6(nx.Graph([(0,1),(0,1),(0,1)]), 'test.s6') >>> G = nx.read_sparse6('test.s6') >>> sorted(G.edges()) [(0, 1)] See Also -------- generate_sparse6, read_sparse6, parse_sparse6 References ---------- .. [1] Sparse6 specification iiN(tstriptlentappendR(tpathtglisttline((sp/private/var/folders/w6/vb91730s7bb1k90y_rnhql1dhvdd44/T/pip-build-w4MwvS/networkx/networkx/readwrite/sparse6.pyRys$   tdirectedcs´|jƒ}d‰xdˆ>|kr2ˆd7‰qW‡fd†}|dk r`|j|ƒ}ntj|ddƒ}td„|jƒDƒƒ}g}d}xÆ|D]¾\} } | |krß|jdƒ|j|| ƒƒq¤| |dkr|d7}|jdƒ|j|| ƒƒq¤| }|jdƒ|j|| ƒƒ|jdƒ|j|| ƒƒq¤WˆdkrØ|dˆ>krØt |ƒ dˆkrØ||dkrØ|jdƒ|jdgt |ƒ dƒn|jdgt |ƒ dƒgt dt |ƒdƒD]h} || dd>|| dd >|| d d >|| d d >|| d d>|| dd>^q} d t t |ƒƒt | ƒ} |r¬d | S| SdS(szGenerate sparse6 format string from an undirected graph. Parameters ---------- G : Graph (undirected) nodes: list or iterable Nodes are labeled 0...n-1 in the order provided. If None the ordering given by G.nodes() is used. header: bool If True add '>>sparse6<<' string to head of data Returns ------- s : string String in sparse6 format Raises ------ NetworkXError If the graph is directed Examples -------- >>> G = nx.MultiGraph([(0, 1), (0, 1), (0, 1)]) >>> nx.generate_sparse6(G) '>>sparse6<<:A_' See Also -------- read_sparse6, parse_sparse6, write_sparse6 Notes ----- The format does not support edge or node labels. References ---------- .. [1] Sparse6 specification ics9gtˆƒD](}|dˆd|>@r/dnd^q S(sBig endian k-bit encoding of xii(R(Rti(R(sp/private/var/folders/w6/vb91730s7bb1k90y_rnhql1dhvdd44/T/pip-build-w4MwvS/networkx/networkx/readwrite/sparse6.pytencÚstorderingtsortedcss3|])\}}t||ƒt||ƒfVqdS(N(tmaxtmin(t.0tuR$((sp/private/var/folders/w6/vb91730s7bb1k90y_rnhql1dhvdd44/T/pip-build-w4MwvS/networkx/networkx/readwrite/sparse6.pys ásiiiiiiR s >>sparse6<>sparse6<<' string to head of data Raises ------ NetworkXError If the graph is directed Examples -------- >>> G = nx.Graph([(0, 1), (0, 1), (0, 1)]) >>> nx.write_sparse6(G, 'test.s6') See Also -------- read_sparse6, parse_sparse6, generate_sparse6 Notes ----- The format does not support edge or node labels. References ---------- .. [1] Sparse6 specification R=R>s N(twriteR (R%R,R=R>((sp/private/var/folders/w6/vb91730s7bb1k90y_rnhql1dhvdd44/T/pip-build-w4MwvS/networkx/networkx/readwrite/sparse6.pyR s*cCs2ddl}|jjdƒr.|jdƒndS(Niÿÿÿÿstest.s6(tosR,tisfiletunlink(ttestRE((sp/private/var/folders/w6/vb91730s7bb1k90y_rnhql1dhvdd44/T/pip-build-w4MwvS/networkx/networkx/readwrite/sparse6.pytteardown_module4s (t__doc__tnetworkxRtnetworkx.exceptionRtnetworkx.utilsRRtnetworkx.readwrite.graph6RRRRt__all__RRR RR R RI(((sp/private/var/folders/w6/vb91730s7bb1k90y_rnhql1dhvdd44/T/pip-build-w4MwvS/networkx/networkx/readwrite/sparse6.pyts "  X/ ]-