Python2 runtime, invalid syntax (?)

[Athanasios Anastasiou]

Hello everyone

Really excited to see this recently: https://theantlrguy.atlassian.net/wiki/display/ANTLR4/Python+Target

Simple grammar in hand, antlr4 -Dlanguage=Python2 simple.g4, no errors during generation.

BUT, straight into iPython to build the parsing tree (which would be fantastic on its own right now) and when:

from antlr4 import *

This happens:

  File "/usr/local/lib/python2.7/dist-packages/antlr4/Token.py", line 84
    def text(self, text:str):
                       ^
SyntaxError: invalid syntax


Is that some sort of Java remnant?

The antlr4 python2 runtime was installed via pip without any complaints.

Looking forward to hearing from you
AA

[Terence Parr]

weird. i just tried on my mac:

$ pip install antlr4-python2-runtime

Collecting antlr4-python2-runtime

  Downloading antlr4-python2-runtime-4.5.2.tar.gz (108kB)

    100% |████████████████████████████████| 110kB 1.4MB/s 

Installing collected packages: antlr4-python2-runtime

  Running setup.py install for antlr4-python2-runtime

Successfully installed antlr4-python2-runtime-4.5.2

$ python

Python 2.7.9 (default, Jul  5 2015, 12:18:15) 

[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.57)] on darwin

Type "help", "copyright", "credits" or "license" for more information.

>>> from antlr4 import *

>>> 

seems ok.  maybe you are launching python3 and using python 2 lib?

Ter

--
You received this message because you are subscribed to the Google Groups "antlr-discussion" group.
To unsubscribe from this group and stop receiving emails from it, send an email to antlr-discussi...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[Athanasios Anastasiou]

Hello Terence

Thank you for your response.

In fact, iPython starts on Python 2.7.6. Weird indeed, I just tried it on an _identical_ image at a different setup and it worked fine :/

Anyway, I am so excited to find the Python target mostly functional (I say mostly, as I haven't pushed it yet :D ), this is beautiful, a very warm "thank you" to everyone who was involved in this.

All the best

AA

--
You received this message because you are subscribed to a topic in the Google Groups "antlr-discussion" group.
To unsubscribe from this topic, visit https://groups.google.com/d/topic/antlr-discussion/n6SDXXdfT3I/unsubscribe.
To unsubscribe from this group and all its topics, send an email to antlr-discussi...@googlegroups.com.

[Athanasios Anastasiou]

In case this might help to highlight some sort of small bug somewhere, I managed to resolve the situation of Python2 / Python3 runtime on my machines.

I had both antlr4-python*-runtime installed and iPython was indeed picking up the Python3 package despite it starting on top of a 2.7.6 interperter.

Perhaps there is something going on with the install script (?) because even when I have a perfectly working Python2 antlr4 runtime and subsequently install the Python3 runtime it seems to be sending its files to the 2.7 dist-packages location.

Hope this helps.

All the best
AA