I created some Python files keeping my functions a bit separated to ease working / fixing. All files are in one directory. The structure may get broken down to something like:
- a.py (a class A with basic stuff)
- b.py (a class B with basic stuff)
- modA.py (create a class C deriving from A and B)
- modB.py (create a class D deriving from A and B)
- ...
- main_a.py (using class C)
- main_b.py (using class D)
Every module uses the logging stuff from python. An why so ever - only the root logger messages are written. And I don't see my error.
Here is a minimal example.
a.py
import logging logger = logging.getLogger(__name__) class A(object): def __init__(self): logger.debug("Instance of A") b.py
import logging logger = logging.getLogger(__name__) class B(object): def __init__(self): logger.debug("Instance of B") ab.py
import a import b import logging logger = logging.getLogger(__name__) class AB(a.A, b.B): def __init__(self): logger.debug("Instance of AB") a.A.__init__(self) b.B.__init__(self) main_one.py
import sys import ab import logging import logging.handlers logger = logging.getLogger(__name__) logger.setLevel(logging.DEBUG) handler = logging.StreamHandler(stream=sys.stderr) handler.setLevel(logging.DEBUG) handler.setFormatter(logging.Formatter('%(name)s: %(message)s')) logger.addHandler(handler) logger.warning("The trouble starts") ab = ab.AB() I also tried to use something like self.logger = logging.getLogger(type(self).__name__) to do logging on a per class base, but the result is the same. So may one of you point out where I went wrong when reading the python logging manuals?
TIA.
EDIT 1: My solution
Thanks to both, @falsetru and @Jakub M., using both answers leads to a working solution.
First I put everything in a hierarchy.
main_one.py lib/ __init__.py ab.py basic/ __init__.py a.py b.py Second I changed the logger = logging.getLogger(__name__) in main_one.py to logger = logging.getLogger() (No name for the root logger!).
That did the trick.
Very helpful was a code snippet on GitHub.
