Exit if there is no data

1 files changed, 7 insertions, 3 deletions

diff --git a/webopac.py b/webopac.py
index b153b9f..48b2392 100644
--- a/webopac.py
+++ b/webopac.py
@@ -7,6 +7,7 @@ import csv
 import logging
 import optparse
 import io
+import sys
 
 def get_webopac_data(query, baseurl):
 	cj = http.cookiejar.CookieJar()
@@ -68,8 +69,6 @@ def init():
 	return (options, args)
 
 def printdata(data):
-	data = (elem for elem in data if ' # CD_' in elem['Signatur'])
-
 	for row in data:
 			formatdict={
 				'title': row['Titel'],
@@ -84,7 +83,12 @@ def main():
 	(options, args) = init()
 	f = get_webopac_data(args[0], baseurl=options.baseurl)
 	data = decode_csv(f)
-	printdata(data)
+	data = (elem for elem in data if ' # CD_' in elem['Signatur'])
+	data = list(data)
+	if data:
+		printdata(data)
+	else:
+		sys.exit(1)
 
 if __name__ == '__main__':
 	main()