1 files changed, 19 insertions, 6 deletions
diff --git a/src/argaze/DataLog/File.py b/src/argaze/DataLog/File.py
index 12bad6d..8179f8f 100644
--- a/src/argaze/DataLog/File.py
+++ b/src/argaze/DataLog/File.py
@@ -12,7 +12,7 @@ from typing import TypeVar, Tuple
 from dataclasses import dataclass, field
 import os, pathlib
 
-from argaze import DataFeatures, GazeFeatures
+from argaze import DataFeatures
 
 @dataclass
 class TimeStampedDataLogger(DataFeatures.TimeStampedDataLogger):
@@ -21,8 +21,11 @@ class TimeStampedDataLogger(DataFeatures.TimeStampedDataLogger):
     path: str = field(default=None)
     """File path where to write data."""
 
-    separator: chr = field(default=' ')
-    """Char used to separate timestamp from data"""
+    header: str = field(default=None)
+    """String to write first."""
+
+    separator: str = field(default=", ")
+    """String used to separate list or tuple formatted log."""
 
     def __post_init__(self):
         """Check that folder structure exist and create file."""
@@ -35,13 +38,23 @@ class TimeStampedDataLogger(DataFeatures.TimeStampedDataLogger):
         # Open file
         self._file = open(self.path, 'w', encoding='utf-8', buffering=1)
 
+        # Write header if required
+        if self.header is not None:
+
+            print(self.header, file=self._file, flush=True)
+
     def __del__(self):
         """Close file."""
 
         self._file.close()
 
-    def emit(self, timestamp: DataFeatures.TimeStampType, data: DataFeatures.DataDictionary):
-        """Write timestamp and data separated by separator char as a new line into file."""
+    def emit(self, formatted_log: any):
+        """Write log as a new line into file. List or tuple are converted into strings separated by separator char."""
+
+        # Format list or tuple element into quoted strings
+        if not isinstance(formatted_log, str):
+
+            formatted_log = self.separator.join(f'\"{d}\"' for d in formatted_log)
 
         # Write into file
-        print(f'{timestamp}{self.separator}{eval(self.selector)}', file=self._file, flush=True)
-\ No newline at end of file
+        print(formatted_log, file=self._file, flush=True)
+\ No newline at end of file