fix handling for context vars. add support for disabling prophet option.

[alxlyj]

Project Robyn

add option for disabling prophet

• The holidays_data parameter is now optional in init with a default of None
• check for Prophet enablement via

prophet_enabled = (
    self.holidays_data is not None
    and self.holidays_data.prophet_vars is not None
    and len(self.holidays_data.prophet_vars) > 0
)

• The code conditionally includes Prophet variables in all_ind_vars only if Prophet is enabled

This should match the R implementation where Prophet can be disabled by setting prophet_vars = NULL

---

handling for context vars

In Python (feature_engineering.py), the _prepare_data method is part of the feature engineering process. It creates a copy of input data and standardizes column names. Right now, it has a problematic hardcoded type conversion. Specifically:

        dt_transform["competitor_sales_B"] = dt_transform["competitor_sales_B"].astype(
            "int64"
        )

In this PR:

• Removed the hardcoded "competitor_sales_B" line
• Added dynamic handling of context variables
• Added type conversion logic that:
  • Attempts to convert context variables to numeric if they're not already
  • Uses pd.to_numeric which is more flexible than forcing int64
  • Includes error handling with logging
  • Doesn't force conversion if it's not needed or possible

---

Test

• Ran tutorial1.ipynb without issues.
• pytest /Users/yijuilee/robynpy_release_reviews/Robyn/python/tests/integration/test_feature_engineering.py -v -s
• For more logs: pytest /Users/yijuilee/robynpy_release_reviews/Robyn/python/tests/integration/test_feature_engineering.py -v -s --log-cli-level=DEBUG

collected 9 items                                                                                                                                                                                                                                                                                                

python/tests/integration/test_feature_engineering.py::test_feature_engineering_initialization PASSED
python/tests/integration/test_feature_engineering.py::test_prepare_data_with_custom_context PASSED
python/tests/integration/test_feature_engineering.py::test_feature_engineering_with_different_context_vars 18:55:13 - cmdstanpy - INFO - Chain [1] start processing
18:55:13 - cmdstanpy - INFO - Chain [1] done processing
PASSED
python/tests/integration/test_feature_engineering.py::test_feature_engineering_no_context_vars 18:55:13 - cmdstanpy - INFO - Chain [1] start processing
18:55:13 - cmdstanpy - INFO - Chain [1] done processing
PASSED
python/tests/integration/test_feature_engineering.py::test_invalid_context_var PASSED
python/tests/integration/test_feature_engineering.py::test_feature_engineering_with_prophet_disabled PASSED
python/tests/integration/test_feature_engineering.py::test_feature_engineering_with_empty_prophet_vars PASSED
python/tests/integration/test_feature_engineering.py::test_prophet_enable_disable_comparison 18:55:13 - cmdstanpy - INFO - Chain [1] start processing
18:55:13 - cmdstanpy - INFO - Chain [1] done processing
PASSED
python/tests/integration/test_feature_engineering.py::test_feature_engineering_with_prophet_enabled 18:55:13 - cmdstanpy - INFO - Chain [1] start processing
18:55:13 - cmdstanpy - INFO - Chain [1] done processing
PASSED
========================================================================================================================================= 9 passed, 28 warnings in 2.17s =========================================================================================================================================
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