Parameter Expression by Python

[saca 7]

hi,

simple python script sample
 

'a_b_c'.split('_')[0]
>'a'

samely, i want to execute python script as parameter value,
example) hip filename is "s001_c001_myScene_v001.001.hip"
 

$HIPNAME.split('_')[0]

but it's retuen same strings, very confuse.
i want get "s001" in this case.
please tell me how to write them?

thanks

[Stalkerx777 160]

0. Switch expression language to Python (you've done that already)

1. Set a keyframe on the string parameter. This is required! 

2. Set your expression like this:

hou.expandString("$HIPNAME").split('_')[0]

 

[saca 7]

that's great!
"Set a keyframe", really need.
thanks