Error when trying to load dbc file: "AttributeError: no such attribute name" about cantools HOT 4 CLOSED

I get this output for the same input:

> python 
Python 2.7.12 (default, Nov 20 2017, 18:23:56) 
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import cantools
>>> import pyparsing
>>> cantools.__version__
16.2.0
>>> pyparsing.__version__
2.2.0
>>> cantools.db.formats.dbc.load_string("")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "cantools/db/formats/dbc.py", line 879, in load_string
    e.msg))
cantools.db.formats.utils.ParseError: Invalid DBC syntax at line 1, column 1: '>!<': Expected {VERSION | NS_ | BS_ | BU_ | BO_ | CM_ | BA_DEF_ | BA_DEF_DEF_ | BA_ | VAL_ | VAL_TABLE_ | SIG_VALTYPE_ | SG_MUL_VAL_ | BO_TX_BU_ | BA_DEF_REL_ | BA_DEF_DEF_REL_ | BA_REL_ | EV_}.
>>> 

Is there a problem with your Python or pyparsing installation? I'm using pyparsing 2.2.0.

from cantools.

I was using pyparsing 1.5.6. After I manually installed version 2.2.0 I got the same message you got and the DBC file gets parsed as expected. Thank you. Maybe you can add the minimum required version of pyparsing to the requirements of the tool so that the setup makes sure the correct version is installed?

And thank you for the quick reply.

from cantools.

There is already an requirement for pyparsing 2.0.3: https://github.com/eerimoq/cantools/blob/master/setup.py#L21-L22

Not sure why your pyparsing was not updated, maybe one have to do pip install -U cantools, to force packages to be updated? I'm a setuptools novice, so I might be wrong.

from cantools.

Okay. This probably was an issue with my python. For some reason pip thought, 2.2.0 was installed even though it wasn't. Thank you for your assistance.

from cantools.