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python - 属性错误 : 'Graph' object has no attribute 'cypher' in migration of data from Postgress to Neo4j(Graph Database)

我正在手动将数据从postgres迁移到图形数据库。我写了下面的脚本:importpsycopg2frompy2neoimportauthenticate,Graphauthenticate("localhost:7474","neo4j","password")n4j_graph=Graph("http://localhost:7474/db/data/")try:conn=psycopg2.connect("dbname='db_name'user='user'password='password'")except:print"goodbye"cur=conn.cursor()tr

python - 属性错误 : 'str' object has no attribute 'fileno'

代码:importsubprocessdefprintit():foriinrange(6):forjinrange(6):query="selectrxpkts,txpktsfrom./log.csvwheredatapath="+str(i)+"andport="+str(j)fileName=str(i)+"_"+str(j)+".csv"withopen(fileName,"w+"):p=subprocess.Popen(["python","q","-H","-d",",",query],stdout=fileName)printit()错误:$pythonprocessLo

python - 属性错误 : 'Ui_MainWindow' object has no attribute 'setCentralWidget'

我仍在为我的数据库开发GUI,现在我有一个不同的错误:Traceback(mostrecentcalllast):File"G:\Python\DatabaseKastThuis\PyQtTest\MainMenu_ui.py",line84,inex=Ui_MainWindow()File"G:\Python\DatabaseKastThuis\PyQtTest\MainMenu_ui.py",line16,in__init__self.setupUi(self)File"G:\Python\DatabaseKastThuis\PyQtTest\MainMenu_ui.py",lin

python - WTForms "too many values to unpack"与 SelectField

我正在使用WTForms并尝试显示SelectField,但出现以下错误:>>>form.status()Traceback(mostrecentcalllast):File"",line1,inFile"C:\Python26\Lib\site-packages\wtforms\fields.py",line136,in__call__returnself.widget(self,**kwargs)File"C:\Python26\Lib\site-packages\wtforms\widgets.py",line237,in__call__forval,label,selected

python 2 : AttributeError: 'list' object has no attribute 'strip'

我有一个关于列表的小问题。所以我有一个名为l的列表:l=['Facebook;Google+;MySpace','Apple;Android']如您所见,我的列表中只有2个字符串。我想用';'分隔列表l并将新的5个字符串放入名为l1的新列表中。我该怎么做?我也试过这样做:l1=l.strip().split(';')但是Python给我一个错误:AttributeError:'list'objecthasnoattribute'strip'如果“list”对象没有属性“strip”或“split”,我该如何拆分列表?谢谢 最佳答案

python - django.core.exceptions.FieldDoesNotExist : model has no field named <function SET_NULL at 0x7fc5ae8836e0>

经过一些谷歌搜索并只找到一个dead-endtopic,我仍然陷入迁移问题。我的模型:classCurationArticle(models.Model):title=models.CharField(max_length=150,null=True,blank=True)description=models.TextField(null=True,blank=True)link=models.CharField(max_length=255,null=True,blank=True)author=models.CharField(max_length=150,blank=True,n

Python 缩进错误 : too many levels of indentation

我有一部分生成的python程序,生成的代码包含很多嵌套的if/else,我的问题是很多可以太多了,我在运行代码时遇到了这个错误:IndentationError:toomanylevelsofindentation我读到这是在python解释器的低级别上定义的一些限制,有人知道我如何找到它的解决方法吗?一些解释器参数就可以了,唯一的solutionproposal我发现建议重新编译Python以便为MAXINDENT常量设置不同的值,这并不是我梦寐以求的。EDIT:代码是一大堆嵌套的if...else,它很脏但是我发现它是最快的将复杂的决策树移植到Python.我知道它有多脏;我不是

python - SQLAlchemy , 属性错误 : 'tuple' object has no attribute 'foreign_keys'

我有以下模型来描述我的数据库模式:fromsqlalchemy.ext.declarativeimportdeclarative_basefromsqlalchemyimportColumn,Integer,String,ForeignKeyfromsqlalchemy.ormimportrelationship,backrefimportsqlalchemy.dialects.mysqlasmysqlBase=declarative_base()classCountry(Base):__tablename__='countries'__table_args__={'mysql_eng

python - Py3k : What's more pythonic - one import with commas or many imports?

什么是更pythonic的?importosimportsysimportgetopt...或importos,sys,getopt,...? 最佳答案 来自PEP8:导入通常应该在单独的行中,例如:是的:importosimportsys否:importsys,os虽然这样说没关系:fromsubprocessimportPopen,PIPE 关于python-Py3k:What'smorepythonic-oneimportwithcommasormanyimports?,我们在St

python - Django.rest_framework : How to serialize one to many to many?

我在使用Django进行序列化时遇到了一些麻烦。我有三个模型,比方说学校、房间和书table(例如虚拟名称)。每个学校有多个Room,每个Room有多个Desk。类及其关系如下所示:classSchool(models.Model):name=models.CharField()classRoom(models.Model):name=models.CharField()school_id=models.ForeignKey(School)classDesk(models.Model):row=models.IntegerField()col=models.IntegerField()