fix: date conversion exceptions

Author: domarm-comat

pglive/sources/live_axis.py

@@ -7,7 +7,7 @@
 from pyqtgraph.Qt import QtGui, QtCore  # type: ignore
 
 from pglive.kwargs import Axis
-from pglive.sources.utils import get_scaled_time_duration
+from pglive.sources.utils import get_scaled_time_duration, dt_conversion
 
 
 class LiveAxis(pg.AxisItem):
@@ -67,10 +67,10 @@ def tickStrings(self, values: List, scale: float, spacing: float) -> List:
                 pass
         if self.tick_format == Axis.DATETIME:
             # Convert tick to Datetime
-            tick_strings = [datetime.datetime.fromtimestamp(value).strftime("%Y-%m-%d %H:%M:%S") for value in values]
+            tick_strings = [dt_conversion(value, dt_format="%Y-%m-%d %H:%M:%S") for value in values]
         elif self.tick_format == Axis.TIME:
             # Convert tick to Time
-            tick_strings = [datetime.datetime.fromtimestamp(value).strftime("%H:%M:%S") for value in values]
+            tick_strings = [dt_conversion(value, dt_format="%H:%M:%S") for value in values]
         elif self.tick_format == Axis.DURATION:
             # Convert tick to Time duration
             tick_strings = [get_scaled_time_duration(value, short=self.df_short) for value in values]

pglive/sources/utils.py

@@ -42,3 +42,13 @@ def get_scaled_time_duration(seconds: float, short: bool = True) -> str:
         duration = "{} {} {} {} {} {}".format(d.year - 1, year, d.month, month, d.day, day)
 
     return duration
+
+
+def dt_conversion(value: int, dt_format: str) -> str:
+    try:
+        return datetime.datetime.fromtimestamp(value).strftime(dt_format)
+    except (ValueError, OSError, OverflowError):
+        if value > 0:
+            return "+inf"
+        else:
+            return "-inf"