Merge pull request #58 from ilikecake/file_flush_fix

Add flush to the file write functions

adafruit_logging.py

@@ -179,6 +179,9 @@ def emit(self, record: LogRecord) -> None:
 
  raise NotImplementedError()
 
+ def flush(self) -> None:
+ """Placeholder for flush function in subclasses."""
+
 
 # pylint: disable=too-few-public-methods
 class StreamHandler(Handler):
@@ -206,6 +209,12 @@ def emit(self, record: LogRecord) -> None:
  """
  self.stream.write(self.format(record) + self.terminator)
 
+ def flush(self) -> None:
+ """flush the stream. You might need to call this if your messages
+ are not appearing in the log file.
+ """
+ self.stream.flush()
+
 
 class FileHandler(StreamHandler):
  """File handler for working with log files off of the microcontroller (like
@@ -239,6 +248,7 @@ def emit(self, record: LogRecord) -> None:
  :param record: The record (message object) to be logged
  """
  self.stream.write(self.format(record))
+ self.stream.flush()
 
 
 class RotatingFileHandler(FileHandler):
@@ -338,6 +348,7 @@ def emit(self, record: LogRecord) -> None:
  ):
  self.doRollover()
  self.stream.write(self.format(record))
+ self.stream.flush()
 
 
 class NullHandler(Handler):