Jython does not catch Exceptions
Jython doesn't have the -m option, and it raises an error with from .utils import *.
The solution is not to use relative path
sys.path.insert(0, os.path.dirname(__file__)) from utils import *
As I need to use the code both Jython and CPython, I came up with this command:
try: from .utils import * except Exception: # Jython or Python with python context/context.py invocation sys.path.insert(0, os.path.dirname(__file__)) from utils import *
However, Jython doesn't seem to catch the exception, and still generates an exception.
File "context/context.py", line 9 SyntaxError: 'import *' not allowed with 'from .'
Based on How to know that the interpreter is Jython or CPython in the code?, I tried
binary = sys.executable if binary is None: sys.path.insert(0, os.path.dirname(__file__)) from utils import * else: from .utils import *
I still get the SyntaxError, why Jython interpreter keeps parsing from .utils import * when it was supposed to do so; I mean, this code works.
binary = sys.executable if binary is None: sys.path.insert(0, os.path.dirname(__file__)) from utils import * else: pass
This is my Jython information:
Jython 2.7b1 (default:ac42d59644e9, Feb 9 2013, 15:24:52) [Java HotSpot(TM) 64-Bit Server VM (Oracle Corporation)] on java1.7.0_51 Type "help", "copyright", "credits" or "license" for more information.
Somehow it doesn't like your relative import, I am thinking about 2 possibles solutions:
- Try to import the utils package from the root of your project.
- Add the path to utils package to your PYTHONPATH.
issubclass(SyntaxError, Exception) says that it should be caught and indeed, if you raise it manually it is being caught:
try: raise SyntaxError except Exception: print('caught it')
It prints caught it. Though
try: from . import * except Exception: print('nope')
File "<stdin>", line 2 SyntaxError: 'import *' not allowed with 'from .'
If you add some code above then you see that it is not executed i.e., the latter exception is not runtime. It is the same in CPython e.g.:
import sys sys.stderr.write("you won't see it\n") try: 1_ # cause SyntaxError at compile time except: print("you won't see it either")
The error is raised during compilation.
To workaround the problem, you could try to use absolute imports:
from __future__ import absolute_import from context.utils import * # both Jython and CPython