Trying to fix max_len determination.

small_RNA-seq/small_RNA-seq.snakefile

@@ -4221,7 +4221,7 @@ rule plot_size_distribution:
 
 def get_type_max_len(wildcards):
     """Returns the maximum length for a "pi", "si", or "mi" read type.
-    Otherwise returns 0."""
+    Otherwise returns MAX_LEN."""
     read_type = wildcards.read_type
     try:
         # ex: "18-26"
@@ -4231,9 +4231,13 @@ def get_type_max_len(wildcards):
             # ex: siuRNA
             return read_type_max_len[read_type[:2]]
         except KeyError:
-            # ex: nomap_siRNA
-            general_type = read_type.split("_")[1]
-            return read_type_max_len.get(general_type[:2], int(MAX_LEN))
+            try:
+                # ex: tRFRNA
+                return read_type_max_len[read_type[:-3]]
+            except KeyError:
+                # ex: nomap_siRNA
+                general_type = read_type.split("_")[1]
+                return read_type_max_len.get(general_type[:2], int(MAX_LEN))
 
 
 rule compute_base_composition_along: