KeyError in SCHEDOPTIONS from missing keys in dictionary on older files

[sayer122]

Hi,
I was testing this package on some older xer files and have come across a few key errors in schemas/schedoptions.py
I see that it uses: data["max_multiple_longest_path"]
This is currently throwing a key error for me: KeyError: 'max_multiple_longest_path'
This does not account for scenarios where this key might be missing. Would it be possible to update this to use .get() instead to allow it to handle files where it does not contain these keys?
e.g. updating this:

        self.max_multiple_longest_path: int | None = optional_int(
            data["max_multiple_longest_path"]
        )

to this:

        self.max_multiple_longest_path: int | None = optional_int(
            data.get("max_multiple_longest_path")
        )

I've seen it happen for a few different keys in the schedoptions schema. I'll make a PR with the proposed fixes but would love to hear your feedback and whether you think this could cause any issues

[sayer122]

Ah I'm not able to create a PR but here were the proposed changes

@@ -10,12 +10,12 @@ class SCHEDOPTIONS:
         A class to represent the Schedule Options.
         """
         self.max_multiple_longest_path: int | None = optional_int(
-            data["max_multiple_longest_path"]
+            data.get("max_multiple_longest_path")
         )
         self.proj_id: str = data["proj_id"]
-        self.calendar_on_relationship_lag: str = data[
-            "sched_calendar_on_relationship_lag"
-        ]
+        self.calendar_on_relationship_lag: str = data.get(
+            "sched_calendar_on_relationship_lag", ""
+        )
         self.float_type: str = data["sched_float_type"]
         self.lag_early_start_flag: bool = data["sched_lag_early_start_flag"] == "Y"
         self.open_critical_flag: bool = data["sched_open_critical_flag"] == "Y"
@@ -25,11 +25,11 @@ class SCHEDOPTIONS:
         self.setplantoforecast: bool = data["sched_setplantoforecast"] == "Y"
         self.use_expect_end_flag: bool = data["sched_use_expect_end_flag"] == "Y"
         self.use_project_end_date_for_float = (
-            data["sched_use_project_end_date_for_float"] == "Y"
+            data.get("sched_use_project_end_date_for_float", "N") == "Y"
         )
         self.schedoptions_id: str = data["schedoptions_id"]
         self.use_total_float_multiple_longest_paths: bool = (
-            data["use_total_float_multiple_longest_paths"] == "Y"
+            data.get("use_total_float_multiple_longest_paths", "N") == "Y"
         )

[jjCode01]

Hi,
Thank you for letting me know! I've incorporated your fixes.