parsing tree from excel sheet

alb al.basili at gmail.com
Thu Jan 29 22:32:21 CET 2015


Hi MRAB,

MRAB <python at mrabarnett.plus.com> wrote:
[]
>>> SyntaxError: invalid syntax
>>> debian at debian:example$ python3 export_latex.py doctree.csv
>>>   File "export_latex.py", line 36
>>>     yield from child.show2()
>>>              ^
>>> SyntaxError: invalid syntax
>>
>> and I've tried with both python and python3 (see below versions).
>>
>> debian at debian:example$ python
>> Python 2.6.6 (r266:84292, Dec 27 2010, 00:02:40)
>> [GCC 4.4.5] on linux2
>> Type "help", "copyright", "credits" or "license" for more information.
>>>>>
>> debian at debian:example$ python3
>> Python 3.1.3 (r313:86834, Nov 28 2010, 11:28:10)
>> [GCC 4.4.5] on linux2
>> Type "help", "copyright", "credits" or "license" for more information.
>>>>>
>>
>> Is it an issue related to my installation? Shall I upgrade and/or
>> downgrade?
>>
> "yield from" was introduced in Python 3.3.
> 

Ok, that either means I need to upgrade to 3.3 or need to modify the 
snippet to a suitable syntax that would work with other versions.

Considering that upgrading is something that I'm not keen to do on my 
production system I believe I've only have one available choice.

It seems I could use the generator and iterate with .next() in python 
2.6, at least from what I found here:
http://stackoverflow.com/questions/1756096/understanding-generators-in-python

Al



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