Make more like CPython's logger

.travis.yml

@@ -42,7 +42,7 @@ install:
   - pip install --force-reinstall pylint==1.9.2
 
 script:
-  - pylint adafruit_logger.py
+  - pylint adafruit_logging.py
   - ([[ ! -d "examples" ]] || pylint --disable=missing-docstring,invalid-name,bad-whitespace examples/*.py)
   - circuitpython-build-bundles --filename_prefix adafruit-circuitpython-logger --library_location .
   - cd docs && sphinx-build -E -W -b html . _build/html && cd ..

README.rst

@@ -31,13 +31,13 @@ Usage Example
 
 .. code-block:: python
 
-    from adafruit_logger import Logger, ERROR, INFO
+    import adafruit_logging as logging
 
-    logger = Logger()
+    logger = logging.getLogger('test')
 
-    logger.level = ERROR
-    logger.log(INFO, 'Info message')
-    logger.log(ERROR, 'Error message')
+    logger.setLevel(logging.ERROR)
+    logger.info('Info message')
+    logger.error('Error message')
 
 
 Contributing

adafruit_logger.py → adafruit_logging.py

@@ -20,7 +20,7 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 # THE SOFTWARE.
 """
-`adafruit_logger`
+`adafruit_logging`
 ================================================================================
 
 Logging module for CircuitPython
@@ -41,6 +41,7 @@
 
 """
 #pylint:disable=redefined-outer-name,consider-using-enumerate,no-self-use
+#pylint:disable=invalid-name
 
 import time
 
@@ -65,7 +66,9 @@ def level_for(value):
 
     """
     for i in range(len(LEVELS)):
-        if value < LEVELS[i][0]:
+        if value == LEVELS[i][0]:
+            return LEVELS[i][1]
+        elif value < LEVELS[i][0]:
             return LEVELS[i-1][1]
     return LEVELS[0][1]
 
@@ -79,11 +82,7 @@ def format(self, level, msg):
         :param msg: the message to log
 
         """
-        now = time.localtime()
-        time_vals = (now.tm_year, now.tm_mon, now.tm_mday,
-                     now.tm_hour, now.tm_min, now.tm_sec)
-        timestamp = '%4d/%02d/%02d %02d:%02d:%02d' % time_vals
-        return '{0}: {1} - {2}'.format(timestamp, level_for(level), msg)
+        return '{0}: {1} - {2}'.format(time.monotonic(), level_for(level), msg)
 
     def emit(self, level, msg):
         """Send a message where it should go.
@@ -108,30 +107,48 @@ def emit(self, level, msg):
 # The level module-global variables get created when loaded
 #pylint:disable=undefined-variable
 
+logger_cache = dict()
+
+def getLogger(name):
+    """Create or retrieve a logger by name.
+
+    :param name: the name of the logger to create/retrieve
+
+    """
+    if name not in logger_cache:
+        logger_cache[name] = Logger()
+    return logger_cache[name]
+
 class Logger(object):
     """Provide a logging api."""
 
-    def __init__(self, handler=None):
+    def __init__(self):
         """Create an instance.
 
         :param handler: what to use to output messages. Defaults to a PrintHandler.
 
         """
         self._level = NOTSET
-        if handler is None:
-            self._handler = PrintHandler()
-        else:
-            self._handler = handler
-
-    @property
-    def level(self):
-        """The level."""
-        return self._level
-
-    @level.setter
-    def level(self, value):
+        self._handler = PrintHandler()
+
+    def setLevel(self, value):
+        """Set the logging cuttoff level.
+
+        :param value: the lowest level to output
+
+        """
         self._level = value
 
+    def addHandler(self, hldr):
+        """Sets the handler of this logger to the specified handler.
+        *NOTE* this is slightly different from the CPython equivalent which adds
+        the handler rather than replaceing it.
+
+        :param hldr: the handler
+
+        """
+        self._handler = hldr
+
     def log(self, level, format_string, *args):
         """Log a message.
 
@@ -140,8 +157,8 @@ def log(self, level, format_string, *args):
         :param args: arguments to ``format_string.format()``, can be empty
 
         """
-        if self._level != NOTSET and level >= self._level:
-            self._handler.emit(level, format_string.format(*args))
+        if level >= self._level:
+            self._handler.emit(level, format_string % args)
 
     def debug(self, format_string, *args):
         """Log a debug message.

docs/api.rst

@@ -4,5 +4,5 @@
 .. If your library file(s) are nested in a directory (e.g. /adafruit_foo/foo.py)
 .. use this format as the module name: "adafruit_foo.foo"
 
-.. automodule:: adafruit_logger
+.. automodule:: adafruit_logging
    :members:

docs/conf.py

@@ -20,7 +20,7 @@
 # Uncomment the below if you use native CircuitPython modules such as
 # digitalio, micropython and busio. List the modules you use. Without it, the
 # autodoc module docs will fail to generate with a warning.
-# autodoc_mock_imports = ["digitalio", "busio"]
+#autodoc_mock_imports = ["digitalio", "busio"]
 
 
 intersphinx_mapping = {'python': ('https://docs.python.org/3.4', None),'CircuitPython': ('https://circuitpython.readthedocs.io/en/latest/', None)}

examples/logger_simpletest.py

@@ -1,8 +1,10 @@
 #pylint:disable=undefined-variable,wildcard-import,no-name-in-module
-from adafruit_logger import Logger, ERROR, INFO
+#pylint:disable=no-member
 
-logger = Logger()
+import adafruit_logging as logging
 
-logger.level = ERROR
-logger.log(INFO, 'Info message')
-logger.log(ERROR, 'Error message')
+logger = logging.getLogger('test')
+
+logger.setLevel(logging.ERROR)
+logger.info('Info message')
+logger.error('Error message')

setup.py

@@ -59,5 +59,5 @@
     # simple. Or you can use find_packages().
     # TODO: IF LIBRARY FILES ARE A PACKAGE FOLDER,
     #       CHANGE `py_modules=['...']` TO `packages=['...']`
-    py_modules=['adafruit_logger'],
+    py_modules=['adafruit_logging'],
 )