get_children_of_type: AttributeError: 'str' object has no attribute '__name__'

[mrkafk]

Parsed string:

host example1 {
 hardware ethernet aa:bb:ff:20:fa:12;
 fixed-address 192.168.1.181;
 option host-name "example1";
 ddns-hostname "example1";
}

host example2 {
 hardware ethernet aa:bb:ff:20:fa:13;
 fixed-address 192.168.1.191;
 option host-name "example2";
 ddns-hostname "example2";
}

Code:

def get_hosts(s):
    grammar = """
    config: hosts*=host ;

    host: 'host' hostname=ID '{'
        'hardware ethernet' hardware_ethernet=/[0-9a-fA-F:]+/';'
        'fixed-address' fixed_address=/([0-9]{1,3}\.){3}[0-9]{1,3}/';'
        'option host-name' option_host_name=STRING';'
        'ddns-hostname' ddns_hostname=STRING';'
    '}'
    ;
    """
    mm = metamodel_from_str(grammar)
    model = mm.model_from_str(s)
    hosts = get_children_of_type('host', model)

Exception:

  File "./prog.py", line 58, in get_hosts
    hosts = get_children_of_type('host', model)
  File "/ve/local/lib/python2.7/site-packages/textx/model.py", line 125, in get_children_of_type
    typ = typ.__name__
AttributeError: 'str' object has no attribute '__name__'

Per get_children_of_type docstring, typ should be allowed to be a string?

[goto40]

I checked your example with python 3.6 and the current textX version. I do not get the effect.

Which version of textX and python do you use?

from textx import metamodel_from_str, get_children_of_type

grammar = """
config: hosts*=host ;

host: 'host' hostname=ID '{'
    'hardware ethernet' hardware_ethernet=/[0-9a-fA-F:]+/';'
    'fixed-address' fixed_address=/([0-9]{1,3}\.){3}[0-9]{1,3}/';'
    'option host-name' option_host_name=STRING';'
    'ddns-hostname' ddns_hostname=STRING';'
'}'
;
"""
mm = metamodel_from_str(grammar)
model = mm.model_from_str('''
host example1 {
 hardware ethernet aa:bb:ff:20:fa:12;
 fixed-address 192.168.1.181;
 option host-name "example1";
 ddns-hostname "example1";
}

host example2 {
 hardware ethernet aa:bb:ff:20:fa:13;
 fixed-address 192.168.1.191;
 option host-name "example2";
 ddns-hostname "example2";
}
''')
hosts = get_children_of_type('host', model)

for h in hosts:
    print(h.hostname)

[igordejanovic]

I think that is related to #105 . Inputs to textX must be unicode. Make sure your variable s is of unicode type. We will provide type checks for better error report in the future.

[igordejanovic]

BTW, this is an example from this SO question. I'm linking here as it is an interesting use-case that should be covered in the docs (FAQ probably). Will make an issue for that.

[igordejanovic]

I reproduced this problem with Python 2.7 and it is a unicode problem. Putting from __future__ import unicode_literals at the top of the file solves the issue.

[igordejanovic]

This should not be an issue anymore as of #120 unicode is required.