From 9b2c25d3c927b7533e5d7d9665b67962e4c6934b Mon Sep 17 00:00:00 2001
From: Jordan Gong <jordan.gong@protonmail.com>
Date: Thu, 17 Mar 2022 20:10:42 +0800
Subject: Move some utils to libs directory

---
 libs/utils.py | 68 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 libs/utils.py

(limited to 'libs/utils.py')

diff --git a/libs/utils.py b/libs/utils.py
new file mode 100644
index 0000000..fde86eb
--- /dev/null
+++ b/libs/utils.py
@@ -0,0 +1,68 @@
+import logging
+import os
+
+EPOCH_LOGGER = 'epoch_logger'
+BATCH_LOGGER = 'batch_logger'
+
+
+class FileHandlerWithHeader(logging.FileHandler):
+
+    def __init__(self, filename, header, mode='a', encoding=None, delay=0):
+        self.header = header
+        self.file_pre_exists = os.path.exists(filename)
+
+        logging.FileHandler.__init__(self, filename, mode, encoding, delay)
+        if not delay and self.stream is not None:
+            self.stream.write(f'{header}\n')
+
+    def emit(self, record):
+        if self.stream is None:
+            self.stream = self._open()
+            if not self.file_pre_exists:
+                self.stream.write(f'{self.header}\n')
+
+        logging.FileHandler.emit(self, record)
+
+
+def setup_logging(name="log",
+                  filename=None,
+                  stream_log_level="INFO",
+                  file_log_level="INFO"):
+    logger = logging.getLogger(name)
+    logger.setLevel("INFO")
+    formatter = logging.Formatter(
+        '%(asctime)s.%(msecs)03d,%(name)s,%(message)s', '%Y-%m-%d %H:%M:%S'
+    )
+    stream_handler = logging.StreamHandler()
+    stream_handler.setLevel(getattr(logging, stream_log_level))
+    stream_handler.setFormatter(formatter)
+    logger.addHandler(stream_handler)
+    if filename is not None:
+        header = 'time,logger,'
+        if name == BATCH_LOGGER:
+            header += 'batch,n_batches,global_batch,epoch,n_epochs,train_loss,lr'
+        elif name == EPOCH_LOGGER:
+            header += 'epoch,n_epochs,train_loss,test_loss,test_accuracy'
+        else:
+            raise NotImplementedError(f"Logger '{name}' is not implemented.")
+
+        os.makedirs(os.path.dirname(filename), exist_ok=True)
+        file_handler = FileHandlerWithHeader(filename, header)
+        file_handler.setLevel(getattr(logging, file_log_level))
+        file_handler.setFormatter(formatter)
+        logger.addHandler(file_handler)
+    return logger
+
+
+def training_log(name):
+    def log_this(function):
+        logger = logging.getLogger(name)
+
+        def wrapper(*args, **kwargs):
+            output = function(*args, **kwargs)
+            logger.info(','.join(map(str, output.values())))
+            return output
+
+        return wrapper
+
+    return log_this
-- 
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