web/hdalab/management/utils.py
changeset 119 e3ebe3545f72
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/hdalab/management/utils.py	Thu Feb 16 21:48:40 2012 +0100
@@ -0,0 +1,39 @@
+# -*- coding: utf-8 -*-
+'''
+Created on Feb 2, 2012
+
+@author: ymh
+'''
+
+import cStringIO
+import csv
+import codecs
+
+class UnicodeWriter:
+    """
+    A CSV writer which will write rows to CSV file "f",
+    which is encoded in the given encoding.
+    """
+
+    def __init__(self, f, dialect=csv.excel, encoding="utf-8", **kwds):
+        # Redirect output to a queue
+        self.queue = cStringIO.StringIO()
+        self.writer = csv.writer(self.queue, dialect=dialect, **kwds)
+        self.stream = f
+        self.encoder = codecs.getincrementalencoder(encoding)()
+
+    def writerow(self, row):
+        self.writer.writerow([unicode(s).encode("utf-8") for s in row])
+        # Fetch UTF-8 output from the queue ...
+        data = self.queue.getvalue()
+        data = data.decode("utf-8")
+        # ... and reencode it into the target encoding
+        data = self.encoder.encode(data)
+        # write to the target stream
+        self.stream.write(data)
+        # empty queue
+        self.queue.truncate(0)
+
+    def writerows(self, rows):
+        for row in rows:
+            self.writerow(row)