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Hi Michael:

tosca-parser expects that the input values will be defined already and 
passed to the ToscaTemplate object in the parsed_params argument.

If you change:

tosca = ToscaTemplate(sys.argv[1])

to:

tosca = ToscaTemplate(sys.argv[1], parsed_params={'cpus': 4})

the output becomes:

Processing node template server
   disk_size: 10 GB
   num_cpus: 4
   mem_size: 4096 MB
   architecture: x86_64
   type: Linux
   distribution: Fedora
   version: 18.0
   min_instances: 1
   max_instances: 1
   secure: True


Hope this helps.

Bob


On 12/17/18 3:25 AM, Michael Still wrote:
> Hi,
>
> I'm trying to use tosca-parser to parse CSAR files. Its working quite 
> well, until I hit a wall with capabilities today. Specifically I am 
> testing with the single instance wordpress example CSAR, which uses a 
> get_input for the num_cpus argument for host capabilities for the server.
>
> Based on how properties work, I would expect to get a function back 
> for anything which requires referencing another value, but in the case 
> of capabilities I either get the hardcoded value (strings, ints etc), 
> or a None for values which would be functions if we were talking about 
> prototypes.
>
> Here's a snippet of example code:
>
> #!/usr/bin/python
>
> import sys
>
> from jinja2 import Template
> import toscaparser.functions
> from toscaparser.tosca_template import ToscaTemplate
>
> tosca = ToscaTemplate(sys.argv[1])
>
> for nodetemplate in tosca.nodetemplates:
>     print
>     print('Processing node template %s'% nodetemplate.name 
> <http://nodetemplate.name>)
>
>     capabilities = nodetemplate.get_capabilities_objects()
>     for cap in capabilities:
>         propobjs = cap.get_properties_objects()
>         if not propobjs:
>             continue
>
>         for po in propobjs:
>             print('  %s: %s' %(po.name <http://po.name>, po.value))
>
> Which returns this:
>
> $ python _capabilities.py csar_wordpress.zip
> No handlers could be found for logger "tosca.model"
>
> Processing node template wordpress
>   network_name: PRIVATE
>   initiator: source
>   protocol: tcp
>   secure: False
>
> Processing node template webserver
>   network_name: PRIVATE
>   initiator: source
>   protocol: tcp
>   secure: False
>   secure: True
>
> Processing node template mysql_dbms
>
> Processing node template mysql_database
>
> Processing node template server
>   secure: True
>   min_instances: 1
>   max_instances: 1
>   mem_size: 4096 MB
>   num_cpus: None
>   disk_size: 10 GB
>   distribution: Fedora
>   version: 18.0
>   type: Linux
>   architecture: x86_64
>
> I would expect num_cpus for the "server" node_template to be a 
> GetInput() function based on its definition in the CSAR, but instead I 
> get None.
>
> Is there an example somewhere of how to correctly access functions for 
> capabilities?
>
> Thanks,
> Michael

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