Add reduce_2field option to csv batch

Author: pbashyal-nmdp

extras/reduce_conf.json

@@ -30,6 +30,7 @@
   "reduce_serology": false,
   "reduce_v2": true,
   "convert_v2_to_v3": false,
+  "reduce_2field": true,
   "reduce_3field": true,
   "reduce_P": true,
   "reduce_XX": false,

scripts/pyard-reduce-csv

@@ -48,6 +48,10 @@ def is_3field(allele: str) -> bool:
     return len(allele.split(':')) > 2
 
 
+def is_2field(allele: str) -> bool:
+    return len(allele.split(':')) == 2
+
+
 def is_P(allele: str) -> bool:
     if allele.endswith('P'):
         fields = allele.split(':')
@@ -68,6 +72,10 @@ def should_be_reduced(allele, locus_allele):
         if ard.is_v2(locus_allele):
             return True
 
+    if ard_config["reduce_2field"]:
+        if is_2field(locus_allele):
+            return True
+
     if ard_config["reduce_3field"]:
         if is_3field(locus_allele):
             return True