Python Dict date save on the Attribute of node

[miarmy]

Hi....i have a python dict...
I want write it on the attribue of my node or read...
Now, which attr type to choose for my node?
I test this type:
#attr type:
Om.MFnTypedAttribute().create('test','t', Om.MFnData.kString)
...
For write or save dict on the node...i convert the dict to string and save it.and when iitant to read.... I use eval() function:
dict = eval(string)
But eval function is very very slow....in the big dict or string...
One point... My dict have only float number.. this form:.{1:[2,4.5], 4:[6,9.2], ... }
Excuse me.my english is bad

[Justin Israel]

Hi, 

Avoid using the string representation of a dict and eval(). Instead, encode it to either json or python specific cPickle

https://docs.python.org/2/library/json.html

https://docs.python.org/2/library/pickle.html

For pickle, you can use the protocol 0 which is the ascii format. 

Justin 

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[Marcus Ottosson]

Related https://groups.google.com/forum/#!searchin/python_inside_maya/pickle%7Csort:date/python_inside_maya/izd5hROg-LI/vc-GrWadAQAJ

On 28 April 2018 at 18:38, Justin Israel <justin...@gmail.com> wrote:

Hi, 

Avoid using the string representation of a dict and eval(). Instead, encode it to either json or python specific cPickle

https://docs.python.org/2/library/json.html

https://docs.python.org/2/library/pickle.html

For pickle, you can use the protocol 0 which is the ascii format. 

Justin 

On Sat, Apr 28, 2018, 9:34 PM miarmy <egol...@gmail.com> wrote:

Hi....i have a python dict...
I want write it on the attribue of my node or read...
Now, which attr type to choose for my node? 
I test this type:
#attr type:
Om.MFnTypedAttribute().create('test','t', Om.MFnData.kString)
...
For write or save dict on the node...i convert the dict to string and save it.and when iitant to read.... I use eval() function:
dict = eval(string)
But eval function is very very slow....in the big dict or string...
One point... My dict have only float number.. this form:.{1:[2,4.5], 4:[6,9.2], ... }
Excuse me.my english is bad

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