[ENH] Better separation of different MT940 types.

bank_statement_parse_mt940/mt940.py

@@ -110,6 +110,7 @@ class MT940(object):
         """Initialize parser - override at least header_regex.
 
         This in fact uses the ING syntax, override in others."""
+        self.mt940_type = 'General'
         self.header_lines = 3  # Number of lines to skip
         self.header_regex = '^{1:[0-9A-Z]{25,25}}'  # Start of relevant data
         self.footer_regex = '^-}$|^-XXX$'  # Stop processing on seeing this
@@ -123,8 +124,8 @@ class MT940(object):
         if not bool(re.match(self.header_regex, line)):
             raise ValueError(
                 'File starting with %s does not seem to be a'
-                ' MT940 format bank statement.' %
-                data[:12]
+                ' valid %s MT940 format bank statement.' %
+                (data[:12], self.mt940_type)
             )
 
     def parse(self, data):

bank_statement_parse_nl_ing_mt940/mt940.py

@@ -33,6 +33,11 @@ class MT940Parser(MT940):
         r'(?P<reference>\w{1,50})'
     )
 
+    def __init__(self):
+        """Initialize parser - override at least header_regex."""
+        super(MT940Parser, self).__init__()
+        self.mt940_type = 'ING'
+
     def handle_tag_61(self, data):
         """get transaction values"""
         super(MT940Parser, self).handle_tag_61(data)

bank_statement_parse_nl_rabo_mt940/mt940.py

@@ -38,8 +38,8 @@ class MT940Parser(MT940):
     def __init__(self):
         """Initialize parser - override at least header_regex."""
         super(MT940Parser, self).__init__()
+        self.mt940_type = 'RABO'
         self.header_lines = 1  # Number of lines to skip
-
         # Do not user $ for end of string below: line contains much
         # more data than just the first line.
         self.header_regex = '^:940:'  # Start of relevant data