【发布时间】：2013-10-07 13:24:12
【问题描述】：
我正在编写一个应用程序，其目的是从日志数据集创建图表。数据集是一个 xml 文件，它被解析以提取叶数据。使用这个列表，我编写了一个 py2neo 脚本来创建图表。该文件附加到此消息中。 处理脚本时引发异常：
被调试的程序引发了unhandled TypeError异常 "(1676 {"titulo":"reconhecimento e agrupamento de objetos de aprendizagem semelhantes"})" 文件：/usr/lib/python2.7/site-packages/py2neo-1.5.1-py2.7.egg/py2neo/neo4j.py，行：472
我不知道如何处理。我认为代码在语法上是正确的......但是......
我不知道我是否应该在这里发布整个代码，所以代码在：https://gist.github.com/herlimenezes/6867518
代码如下： +++++++++++++++++++++++++++++++++++++++ ' #!/usr/bin/env python #
from py2neo import neo4j, cypher
from py2neo import node, rel
# calls database service of Neo4j
#
graph_db = neo4j.GraphDatabaseService("DEFAULT_DOMAIN")
#
# following nigel small suggestion in http://stackoverflow.com
#
titulo_index = graph_db.get_or_create_index(neo4j.Node, "titulo")
autores_index = graph_db.get_or_create_index(neo4j.Node, "autores")
keyword_index = graph_db.get_or_create_index(neo4j.Node, "keywords")
dataPub_index = graph_db.get_or_create_index(neo4j.Node, "data")
#
# to begin, database clear...
graph_db.clear() # not sure if this really works...let's check...
#
# the big list, next version this is supposed to be read from a file...
#
listaBase = [['2007-12-18'], ['RECONHECIMENTO E AGRUPAMENTO DE OBJETOS DE APRENDIZAGEM SEMELHANTES'], ['Raphael Ghelman', 'SWMS', 'MHLB', 'RNM'], ['Objetos de Aprendizagem', u'Personaliza\xe7\xe3o', u'Perfil do Usu\xe1rio', u'Padr\xf5es de Metadados', u'Vers\xf5es de Objetos de Aprendizagem', 'Agrupamento de Objetos Similares'], ['2007-12-18'], [u'LOCPN: REDES DE PETRI COLORIDAS NA PRODU\xc7\xc3O DE OBJETOS DE APRENDIZAGEM'], [u'Maria de F\xe1tima Costa de Souza', 'Danielo G. Gomes', 'GCB', 'CTS', u'Jos\xe9 ACCF', 'MCP', 'RMCA'], ['Objetos de Aprendizagem', 'Modelo de Processo', 'Redes de Petri Colorida', u'Especifica\xe7\xe3o formal'], ['2007-12-18'], [u'COMPUTA\xc7\xc3O M\xd3VEL E UB\xcdQUA NO CONTEXTO DE UMA GRADUA\xc7\xc3O DE REFER\xcaNCIA'], ['JB', 'RH', 'SR', u'S\xe9rgio CCSPinto', u'D\xe9bora NFB'], [u'Computa\xe7\xe3o M\xf3vel e Ub\xedqua', u'Gradua\xe7\xe3o de Refer\xeancia', u' Educa\xe7\xe3o Ub\xedqua']]
#
pedacos = [listaBase[i:i+4] for i in range(0, len(listaBase), 4)] # pedacos = chunks
#
# lists to collect indexed nodes: is it really useful???
# let's think about it when optimizing code...
dataPub_nodes = []
titulo_nodes = []
autores_nodes = []
keyword_nodes = []
#
#
for i in range(0, len(pedacos)):
# fill dataPub_nodes and titulo_nodes with content.
#dataPub_nodes.append(dataPub_index.get_or_create("data", pedacos[i][0], {"data":pedacos[i][0]})) # Publication date nodes...
dataPub_nodes.append(dataPub_index.get_or_create("data", str(pedacos[i][0]).strip('[]'), {"data":str(pedacos[i][0]).strip('[]')}))
# ------------------------------- Exception raised here... --------------------------------
# The debugged program raised the exception unhandled TypeError
#"(1649 {"titulo":["RECONHECIMENTO E AGRUPAMENTO DE OBJETOS DE APRENDIZAGEM SEMELHANTES"]})"
#File: /usr/lib/python2.7/site-packages/py2neo-1.5.1-py2.7.egg/py2neo/neo4j.py, Line: 472
# ------------------------------ What happened??? ----------------------------------------
titulo_nodes.append(titulo_index.get_or_create("titulo", str(pedacos[i][1]).strip('[]'), {"titulo":str(pedacos[i][1]).strip('[]')})) # title node...
# creates relationship publicacao
publicacao = graph_db.get_or_create_relationships(titulo_nodes[i], "publicado_em", dataPub_nodes[i])
# now processing autores sublist and collecting in autores_nodes
#
for j in range(0, len(pedacos[i][2])):
# fill autores_nodes list
autores_nodes.append(autores_index.get_or_create("autor", pedacos[i][2][j], {"autor":pedacos[i][2][j]}))
# creates autoria relationship...
#
autoria = graph_db.get_or_create_relationships(titulo_nodes[i], "tem_como_autor", autores_nodes[j])
# same logic...
#
for k in range(0, len(pedacos[i][3])):
keyword_nodes.append(keyword_index.get_or_create("keyword", pedacos[i][3][k]))
# cria o relacionamento 'tem_como_keyword'
tem_keyword = graph_db.get_or_create_relationships(titulo_nodes[i], "tem_como_keyword", keyword_nodes[k])
`
引发异常的py2neo片段
def get_or_create_relationships(self, *abstracts):
""" Fetch or create relationships with the specified criteria depending
on whether or not such relationships exist. Each relationship
descriptor should be a tuple of (start, type, end) or (start, type,
end, data) where start and end are either existing :py:class:`Node`
instances or :py:const:`None` (both nodes cannot be :py:const:`None`).
Uses Cypher `CREATE UNIQUE` clause, raising
:py:class:`NotImplementedError` if server support not available.
.. deprecated:: 1.5
use either :py:func:`WriteBatch.get_or_create_relationship` or
:py:func:`Path.get_or_create` instead.
"""
batch = WriteBatch(self)
for abstract in abstracts:
if 3 <= len(abstract) <= 4:
batch.get_or_create_relationship(*abstract)
else:
raise TypeError(abstract) # this is the 472 line.
try:
return batch.submit()
except cypher.CypherError:
raise NotImplementedError(
"The Neo4j server at <{0}> does not support " \
"Cypher CREATE UNIQUE clauses or the query contains " \
"an unsupported property type".format(self.__uri__)
)
====== 有什么帮助吗？
【问题讨论】：
-
如果您不能发布整个代码，请在第 472 行附近发布几行
-
顺便说一句，错误不在那个文件中。它在 neo4j 模块中。