Alog

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Your goto Python logging without panic on context swtich.

Warning: No more logger = logging.getLogger(__name__) in your every file.

.. code-block:: python

import alog alog.info("Hi.") 2016-12-18 20:44:30 INFO Hi. def test(): ... alog.info("Test 1") ... alog.error("Test 2") ... test() 2016-12-18 20:45:19 INFO stdin:2 Test 1 2016-12-18 20:45:19 ERROR stdin:3 Test 2 alog.set_level("ERROR") test() 2016-12-18 20:45:41 ERROR stdin:3 Test 2

If you're new to logging, see Why should you use logging instead of print_.

Installation

.. code-block::

pip install alog

Features

• Instant logging with expected defaults.

  You can do logging instantly by reading a small piece of README. Alog comes with useful defaults:

  • A default logger.

  • Logging level: logging.INFO

  • Logging format::

    "%(asctime)s %(levelname)-5.5s [parent_module.current_module:%(lineno)s]%(message)s", "%Y-%m-%d %H:%M:%S"

• No more name whenever you start to do logging in a module.

  Alog builds the default module names on the fly.

• Compatible with default Python logging module.

  Alog is built upon default Python logging module. You can configure it by the same way of default Python logging module when it's needed.

Comparing alog with Python default logging module

Comparing alog :

.. code-block:: python

In [1]: import alog

In [2]: alog.info("Hello alog!")
2016-11-23 12:20:34 INFO  <IPython> Hello alog!

with logging module:

.. code-block:: python

In [1]: import logging

In [2]: logging.basicConfig(
   ...:     level=logging.INFO,
   ...:     format="%(asctime)s %(levelname)-5.5s "
   ...:            "[%(name)s:%(lineno)s] %(message)s")

In [3]: # In every file you want to do log, otherwise %(names)s won't work.
In [4]: logger = logging.getLogger(__name__)

In [5]: logger.info("Hello log!")
2016-11-23 12:16:30 INFO  [__main__:1] Hello log!

Tips

.. code-block:: python

import alog

a_complex_json_dict = {...}  # or a_complex_dict
alog.info(alog.pformat(a_complex_dict))

restaurant = Restaurant(...)
alog.info(alog.pdir(restaurant))
# or just skip attributes starts with "__":
alog.info(alog.pdir(restaurant, str_not_startswith="__"))
# instead of
alog.info([attr for attr in dir(restaurant) if attr.startswith("_")])

# Play threads?
alog.turn_logging_thread_name(on=True)
# Processes?
alog.turn_logging_process_id(on=True)
# No datetime wanted?
alog.turn_logging_datetime(on=False)

Why should you use logging instead of print

The main goal of logging is to figure out what was going on and to get the insight. print, by default, does simply pure string output. No timestamp, no module hint, and no level control, comparing to a pretty logging record.

Lets start with aproject/models/user.py :

.. code-block:: python

class User: def init(self, user_id, username): ... print(username) ...

What you got output of print :

.. code-block:: python

admin = User(1, "admin") "admin"

Now use alog :

.. code-block:: python

import alog

class User: def init(self, user_id, username): ... alog.info(username) ...

What you got output of alog.info :

.. code-block:: python

admin = User(1, "admin") 2016-11-23 11:32:58 INFO [models.user:6] admin

In the output of hundreds of lines, it helps (a lot).

What if you have used print a log? That's as easy:

.. code-block:: python

import alog

print = alog.info

... # A lot of print code no needed to change