[Py4j-users] Passing list of list to java

[sudheera N. <sud...@gm...>]

Hi

      I need to pass a list of list , ex. [["A","B"],[1,2],[3,4]] to a java
program from python using Py4j and want to collect it from java side to a
String[][] array.

    I can pass a simple list but list of list gives me following error.

=======================================================
 DIgSI/err  - Python Script 'PhdThesesPy' stopped at error
Traceback (most recent call last):

  File "<string>", line 20, in <module>

  File "C:\Program Files (x86)\DIgSILENT\PowerFactory
15.1\python\PhdTheses.py", line 84, in <module>

    repastCall_Demand(DemandData)

  File "C:\Program Files (x86)\DIgSILENT\PowerFactory
15.1\python\PhdTheses.py", line 69, in repastCall_Demand

    wd.setDemandFromPF(java_DemandData)

  File "C:\Python33\lib\site-packages\py4j\java_gateway.py", line 804, in
__call__

    [get_command_part(arg, self.pool) for arg in new_args])

  File "C:\Python33\lib\site-packages\py4j\java_gateway.py", line 804, in
<listcomp>

    [get_command_part(arg, self.pool) for arg in new_args])

  File "C:\Python33\lib\site-packages\py4j\protocol.py", line 278, in
get_command_part

    command_part = REFERENCE_TYPE + parameter._get_object_id()

AttributeError: 'list' object has no attribute '_get_object_id'

===========================================================

Thsanks


-- 
Sudheera Navaratne