Merge pull request #81 from MTgeophysics/fix_modem_read

Add a catch in read_data_file in case Description is empty

Author: kujaku11

mtpy/modeling/modem/data.py

@@ -792,7 +792,9 @@ def _parse_header_line(self, header_line, mode):
                 item_list = [k.strip() for k in item.split(":")]
                 if len(item_list) == 2:
                     key = item_list[0]
-                    value = item_list[1].replace("%", "").split()[0]
+                    value = item_list[1].replace("%", "")
+                    if len(value) > 0:
+                        value = value.split()[0]
                     if key in ["error_value", "data_rotation"]:
                         try:
                             value = float(value)