Add apachelog.processor.set.SetProcessor.

diff --git a/apachelog/processor/set.py b/apachelog/processor/set.py
new file mode 100644 (file)
index 0000000..96e5a22
--- /dev/null
+++ b/apachelog/processor/set.py
@@ -0,0 +1,29 @@
+from . import Processor as _Processor
+
+
+class SetProcessor (_Processor):
+    r"""Keep sets of values for particular data fields.
+
+    >>> import StringIO
+    >>> from apachelog.parser import Parser, FORMATS
+    >>> from apachelog.processor import process
+    >>> stream = StringIO.StringIO('\n'.join([
+    ...         '192.168.0.1 - - [18/Feb/2012:10:25:43 -0500] "GET / HTTP/1.1" 200 560 "-" "Mozilla/5.0 (...)"',
+    ...         '192.168.0.1 - - [18/Feb/2012:10:25:43 -0500] "GET /style.css HTTP/1.1" 200 8240 "-" "Mozilla/5.0 (...)"',
+    ...         '192.168.0.2 - - [18/Feb/2012:10:25:58 -0500] "GET / HTTP/1.1" 404 560 "-" "Mozilla/5.0 (...)"',
+    ...         ]))
+    >>> parser = Parser(FORMATS['extended'])
+    >>> sp = SetProcessor(keys=['%h', '%{User-Agent}i'])
+    >>> process(stream, parser, [sp])
+    >>> for key,values in sorted(sp.values.items()):
+    ...     print('\t'.join([key, str(values)]))
+    ... # doctest: +NORMALIZE_WHITESPACE
+    %h  set(['192.168.0.2', '192.168.0.1'])
+    %{User-Agent}i      set(['Mozilla/5.0 (...)'])
+    """
+    def __init__(self, keys):
+        self.values = dict((k, set()) for k in keys)
+
+    def process(self, data):
+        for k in self.values.keys():
+            self.values[k].add(data[k])