Improve liftover error message

easyliftover/liftover.py

@@ -17,7 +17,7 @@ def get_class(c_type):
         for lifter in lifters:
             if c_type in lifter.supported_formats():
                 return lifter
-            raise Exception("Unsupported file type")
+            raise Exception("Unsupported file type: " + c_type)
 
     def __get_type(path: str) -> str:
         return path.split(".")[-1]

test/test_lifters.py

@@ -1,32 +1,47 @@
 from easyliftover import *
 
-def __test__(clazz, assembly1: str, assembly2: str, path_assembly1: str, path_assembly2: str):
+
+def __test__(
+    clazz, assembly1: str, assembly2: str, path_assembly1: str, path_assembly2: str
+):
     content_assembly1 = open(path_assembly1).read()
     content_assembly2 = open(path_assembly2).read()
-    
+
     lifter: AbstractLifter = clazz(assembly1, assembly2)
     reversed_lifter: AbstractLifter = clazz(assembly2, assembly1)
 
     assert lifter.lift_path(path_assembly1) == content_assembly2
     assert reversed_lifter.lift_path(path_assembly2) == content_assembly1
 
+
 def test_bed():
-    __test__(BedLifter, 'hg19', 'hg38', 'test/data/hg19.bed', 'test/data/hg38.bed')
-
+    __test__(BedLifter, "hg19", "hg38", "test/data/hg19.bed", "test/data/hg38.bed")
+
+
 def test_vcf():
-    __test__(VcfLifter, 'hg19', 'hg38', 'test/data/hg19.vcf', 'test/data/hg38.vcf')
-
+    __test__(VcfLifter, "hg19", "hg38", "test/data/hg19.vcf", "test/data/hg38.vcf")
+
+
 def test_gff():
-    __test__(GffLifter, 'hg19', 'hg38', 'test/data/hg19.gff', 'test/data/hg38.gff')
-
+    __test__(GffLifter, "hg19", "hg38", "test/data/hg19.gff", "test/data/hg38.gff")
+
+
 def test_wig():
-    __test__(WigLifter, 'hg19', 'hg38', 'test/data/hg19.wig', 'test/data/hg38.wig')
-
+    __test__(WigLifter, "hg19", "hg38", "test/data/hg19.wig", "test/data/hg38.wig")
+
+
 def test_bedgraph():
-    __test__(BedGraphLifter, 'hg19', 'hg38', 'test/data/hg19.bedgraph', 'test/data/hg38.bedgraph')
+    __test__(
+        BedGraphLifter,
+        "hg19",
+        "hg38",
+        "test/data/hg19.bedgraph",
+        "test/data/hg38.bedgraph",
+    )
+
 
-#def test_bigwig():
+# def test_bigwig():
 #    lifter = BigWigLifter('hg38', 'hg19')
-#    
+#
 #    assert lifter.lift_url('https://github.com/deeptools/pyBigWig/raw/master/pyBigWigTest/test.bw') == ""
-#    assert lifter.lift_path('test/data/hg38.bw') == ""
+#    assert lifter.lift_path('test/data/hg38.bw') == ""