pygraph_redis 0.2.1

备忘单

#              initialization#       arg1      |    arg2    |     arg3#--------------------------------------------# redis connexion | graph_name |    logger#    redis obj    |  unicode   |  logger objmygraph1=Directed_graph(r_server,u'mygraph1',logger)#optional args:#   arg4    |    arg5#-----------------------# separator | has_root# unicode   |   boolmygraph1=Directed_graph(r_server,u'mygraph1',logger,u'mysep',True))

#                    create or add elements to a node#    arg1   |     arg2     |     arg3     |             arg4#---------------------------------------------------------------------------# node name |  successors  | predecessors |           attributs#  unicode  | unicode list | unicode list |      dictionnary of unicode#           |              |              | or set of unicode (key: unicode)mygraph1.write_on_node(u'm1',[u's2'],[u'p1'],{u'a3':set([u'69']),u'a2':u'42'})

#             delete elements from a node#    arg1   |     arg2     |     arg3     |      arg4#----------------------------------------------------------# node name |  successors  | predecessors | attributs names#  unicode  | unicode list | unicode list | list of unicodemygraph1.write_off_node(u'm1',[u's2'],[u'p1'],[u'attr3',u'attr2']

# delete a node#     arg1#--------------#  node name#   unicodemygraph1.remove_node(u'm1')

# get attributs list#     arg1#--------------#  node name#   unicodemygraph1.get_attributs_list(u'm1')

# get an attribut#     arg1     |     arg2#--------------|--------------#  node name   | attribut name#   unicode    |    unicodemygraph1.get_attribut(u'm1',u'a2')

# get an attribut length#     arg1     |     arg2#--------------|--------------#  node name   | attribut name#   unicode    |    unicodemygraph1.get_attribut_len(u'm1',u'a2')

# get successors#     arg1#--------------#  node name#   unicodemygraph1.get_successors(u'm1')

# get predecessors#     arg1#--------------#  node name#   unicodemygraph1.get_predecessors(u'm1')

初始化

创建“有向图”的实例：

#importing directed_graphfrompygraph_redis.directed_graphimportDirected_graphimportredis#creating a basic loggerimportlogginglogging.basicConfig(format=u'%(message)s')logger=logging.getLogger(u'redis')logger.parent.setLevel(logging.DEBUG)#creating the redis connexionr_server=redis.Redis("localhost")#creating the graph objectmygraph1=Directed_graph(r_server,u'mygraph1',logger)#creating the graph object with a different separatormygraph2=Directed_graph(r_server,u'mygraph2',logger,separator=u'mysep')#creating the graph object with a "root" (improper name, I know)mygraph2=Directed_graph(r_server,u'mygraph2',logger,has_root=True)#"has_root = True" ensures that every node has a predecessor#if enabled, a node has at least root as a predecessor,#but if it has any other predecessor it doesn't have root as predecessor

节点操作

节点创建：

#add node 'm1' to 'mygraph1' with:#successors: 's1' and 's2'#predecessors: 'p1' and 'p2'#attributs:#   * 'attr1': set([u'51',u'69'])#   * 'attr2': '42'mygraph1.write_on_node(u'm1',[u's1',u's2'],[u'p1',u'p2'],{u'attr1':set([u'51',u'69']),u'attr2':u'42'})

关于后续节点和前置节点，如果节点已声明为 在其后继项中，不必在节点后继项集中添加此后继项。 与前辈相同。

示例：

mygraph1.write_on_node(u'pred',[u'succ'],[],{})

mygraph1.write_on_node(u'succ',[],[],{})

得到的结果相同：

mygraph1.write_on_node(u'pred',[u'succ'],[],{})

mygraph1.write_on_node(u'succ',[],[u'pred'],{})

节点版本：

#add new elements or edit existing elements of a node#it's exactly the same function as beforemygraph1.write_on_node(u'm1',[u's4'],[],{u'attr3':set([u'16',u'32',u'64']),u'attr2':u'5150'})#remove some elements of a node (successors, predecessors, attributs)mygraph1.write_off_node(u"m1",[u"s1"],[u"p2"],[u'attr2'])#completely delete a nodemygraph1.remove_node(u'm1')

节点属性操作

要操作节点的属性：

#create the node 'm2'mygraph1.write_on_node(u'm2',[u's1',u's2'],[u'p1',u'p2'],{u'attr1':set([u'51',u'69']),u'attr2':u'42'})#get the set of attribut namesset_of_attributs=mygraph1.get_attributs_list(u'm2')printset_of_attributs#get a specific attributattr2=mygraph1.get_attribut(u'm2',u'attr2')printattr2#get a specific attribut length# 1 if it's a string# cardinal of set if it's a set# 0 if attribut doesn't existsattr2=mygraph1.get_attribut_len(u'm2',u'attr2')printattr2

图形导航

要在图形中导航，您有两个功能：

#get the predecessors of 'm2'predecessors=mygraph1.get_predecessors(u'm2')printpredecessors#get the successors of 'm2'successors=mygraph1.get_successors(u'm2')

如果您有has\u根标志启用：

#get the "root" nameroot=mygraph1.get_root_name()printroot#get the successors of 'root'successors=mygraph1.get_successors(root)printsuccessors

关于redis键

redis密钥格式：

<graph name><sep><node_name><sep><variable_name>[<sep><other>]*

<graph name>: name of the graph
<sep>: the key fields separator
     (this string should not be in node_name or variable_name,
      otherwise, there is a redis key collision possibility)
<node_name>: name of the node
<variable_name>: name of the variable
[<sep><other>]: optional extension

为了避免密钥冲突，您必须仔细选择密钥分隔符， 它不能包含在任何节点名或节点属性名中（可能发生redis密钥冲突）。

关于日志

这个库提供了很多日志，主要是调试、一些信息（例如：传统模式）、一些警告（例如：可能的密钥冲突）