Default sample_query_options to None in fst.py functions

Author: leehart

malariagen_data/anoph/fst.py

@@ -169,7 +169,7 @@ def plot_fst_gwss_track(
         window_size: fst_params.window_size,
         cohort1_query: base_params.sample_query,
         cohort2_query: base_params.sample_query,
-        sample_query_options: Optional[base_params.sample_query_options],
+        sample_query_options: Optional[base_params.sample_query_options] = None,
         sample_sets: Optional[base_params.sample_sets] = None,
         site_mask: Optional[base_params.site_mask] = base_params.DEFAULT,
         cohort_size: Optional[base_params.cohort_size] = fst_params.cohort_size_default,
@@ -276,7 +276,7 @@ def plot_fst_gwss(
         window_size: fst_params.window_size,
         cohort1_query: base_params.sample_query,
         cohort2_query: base_params.sample_query,
-        sample_query_options: Optional[base_params.sample_query_options],
+        sample_query_options: Optional[base_params.sample_query_options] = None,
         sample_sets: Optional[base_params.sample_sets] = None,
         site_mask: Optional[base_params.site_mask] = base_params.DEFAULT,
         cohort_size: Optional[base_params.cohort_size] = fst_params.cohort_size_default,
@@ -362,7 +362,7 @@ def average_fst(
         region: base_params.region,
         cohort1_query: base_params.sample_query,
         cohort2_query: base_params.sample_query,
-        sample_query_options: Optional[base_params.sample_query],
+        sample_query_options: Optional[base_params.sample_query] = None,
         sample_sets: Optional[base_params.sample_sets] = None,
         cohort_size: Optional[base_params.cohort_size] = fst_params.cohort_size_default,
         min_cohort_size: Optional[