Move to src dir.

[edumed.git] / src / edumed / utils.py

diff --git a/src/edumed/utils.py b/src/edumed/utils.py
new file mode 100644 (file)
index 0000000..2dce875
--- /dev/null
+++ b/src/edumed/utils.py
@@ -0,0 +1,44 @@
+# -*- coding: utf-8 -*-
+import codecs
+import csv
+import cStringIO
+
+from settings.apps import INSTALLED_APPS
+
+
+# source: https://docs.python.org/2/library/csv.html#examples
+class UnicodeCSVWriter(object):
+    """
+    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([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)
+
+
+def process_app_deps(list_with_deps):
+    return tuple(
+        (x[0] if type(x) == tuple else x)
+        for x in list_with_deps
+        if type(x) != tuple or x[1] in INSTALLED_APPS)
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