o
    ˷e
                     @   sN   d Z ddgZddlZddlmZ ddlmZ eddddd
dZdd Z	dS )z
Read graphs in LEDA format.

LEDA is a C++ class library for efficient data types and algorithms.

Format
------
See http://www.algorithmic-solutions.info/leda_guide/graphs/leda_native_graph_fileformat.html

	read_leda
parse_leda    N)NetworkXError)	open_filerb)modeUTF-8c                    s    fdd| D }t |}|S )a  Read graph in LEDA format from path.

    Parameters
    ----------
    path : file or string
       File or filename to read.  Filenames ending in .gz or .bz2  will be
       uncompressed.

    Returns
    -------
    G : NetworkX graph

    Examples
    --------
    G=nx.read_leda('file.leda')

    References
    ----------
    .. [1] http://www.algorithmic-solutions.info/leda_guide/graphs/leda_native_graph_fileformat.html
    c                 3   s    | ]}|  V  qd S )N)decode.0lineencoding N/var/www/ideatree/venv/lib/python3.10/site-packages/networkx/readwrite/leda.py	<genexpr>+   s    zread_leda.<locals>.<genexpr>)r   )pathr   linesGr   r   r   r      s   c                 C   sX  t | trt| d} tdd | D } tdD ]}t|  qtt| }|dkr/t }nt	 }tt| }i }td|d D ]}t| 
 d}|dkrUt|}|||< qB|d	d | D  tt| }t|D ]9}zt|  \}}	}
}W n ty } z
td
|d  |d}~ww |j|t| |t|	 |dd d qp|S )a|  Read graph in LEDA format from string or iterable.

    Parameters
    ----------
    lines : string or iterable
       Data in LEDA format.

    Returns
    -------
    G : NetworkX graph

    Examples
    --------
    G=nx.parse_leda(string)

    References
    ----------
    .. [1] http://www.algorithmic-solutions.info/leda_guide/graphs/leda_native_graph_fileformat.html
    
c                 S   s2   g | ]}| d s| ds|dks|dqS )#r    )
startswithrstripr
   r   r   r   
<listcomp>G   s    zparse_leda.<locals>.<listcomp>      z|{}|  r   c                 S   s   g | ]\}}|qS r   r   )r   isr   r   r   r   _   s    z"Too few fields in LEDA.GRAPH edge N   )label)
isinstancestritersplitrangenextintnxDiGraphGraphr   stripadd_nodes_fromitemsBaseExceptionr   add_edge)r   r   dur   nnodesymbolmr   treversalr"   errr   r   r   r   0   s>   



*)r   )
__doc____all__networkxr*   networkx.exceptionr   networkx.utilsr   r   r   r   r   r   r   <module>   s    
