添加多个顶点，更改一个属性值(tinkerpop3 + python GLV) [英] Adding multiple vertices, changing one property-value (tinkerpop3 + python GLV)

问题描述

我正在尝试缩小代码长度，但是我需要几个这种类型的数据实例:

I'm trying to size down my code, but I need several instances of data of this type:

g.addV('A').property('a-type','thing-x').property('a-value',1).next()
g.addV('A').property('a-type','thing-x').property('a-value',2).next()
...   
g.addV('A').property('a-type','thing-x').property('a-value',n).next()

"a值"最多为n(例如50).

Up to 'a-value' being n (for instance 50).

# I tried a version of a loop I found here 
# https://stackoverflow.com/questions/40907529/create-multiple-edges-having-vertex-id-number-0-to-49
# 
g.inject((0..<50).toArray()).as('i').addV('a-value',select('i')).iterate()

但是我得到一个错误:

g.inject((0..<50).toArray()).as('i').addV('a-value',select('i')).iterate()
             ^
    SyntaxError: invalid syntax

执行此操作的正确方法是什么?

What would be the proper way to do this?

在尝试建立答案的基础上，我想补充一点，对于我的情况，在for循环内调用t.iterate()可以得到预期的结果，但是如果在循环外调用则不然，如下所述.

Having tried to build upon the answer, I'd just like to add that for my case, calling t.iterate() within the for-loop gives the expected result, but not so if this is called outside of the loop, as mentioned below.

推荐答案

您发现的示例在Gremlin控制台内部使用，因此使用了Groovy构造.在Python中，您可以执行以下操作:

The example you found was being used inside the Gremlin console and hence using Groovy constructs. From Python you would do something like:

for i in range(1,51):
    g.addV('test').property('mykey',i).iterate()

但是那样一次可以添加一个顶点，所以最好以类似的方式将它们分批写入.

However that will add the vertices one at a time so would be better to write them in small batches in a way similar to this.

t = g.addV('test').property('mykey',1)
for i in range(2,51):
    t.addV('test').property('mykey',i)
t.iterate()

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