Add FileParseException

app/api/views/upload/exception.py

@@ -0,0 +1,16 @@
+class FileParseException(Exception):
+
+    def __init__(self, filename: str, line_num: int, message: str):
+        self.filename = filename
+        self.line_num = line_num
+        self.message = message
+
+    def __str__(self):
+        return f'ParseError: You cannot parse line {self.line_num} in {self.filename}: {self.message}'
+
+    def dict(self):
+        return {
+            'filename': self.filename,
+            'line': self.line_num,
+            'message': self.message
+        }