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Author: Gaurav Bhatt

week5/map.py

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+#!/usr/bin/python
+
+# Format of each line is:
+# date\ttime\tstore name\titem description\tcost\tmethod of payment
+#
+# We want elements 2 (store name) and 4 (cost)
+# We need to write them out to standard output, separated by a tab
+
+import sys
+
+for line in sys.stdin:	
+	d = line.split()
+	for i in d:
+		print "{0}\t{1}".format(i,1)

week5/my.txt

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+Thanks for the response.
+For the references to "time", I have the similar concern as you, but it's not easy to find one which is abstract and explicit.
+
+In real world, and in the context of CNN, 3D data usually means 3D volume or 2D movie. For 3D volume, it's spatial signal. And for movie, it's spatio-temporal signal. Names such as "first_spatial_dim", "second_spatial_dim" etc. would not apply in the case of a movie, because, time dimension for a movie is not the "first spatial dim", it's a temporal dim.

week5/red.py

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+#!/usr/bin/python
+
+import sys
+
+salesTotal = 0
+#salesTotal = []
+oldKey = None
+
+# Loop around the data
+# It will be in the format key\tval
+# Where key is the store name, val is the sale amount
+#
+# All the sales for a particular store will be presented,
+# then the key will change and we'll be dealing with the next store
+
+for line in sys.stdin:
+    data_mapped = line.strip().split("\t")
+    if len(data_mapped) != 2:
+        # Something has gone wrong. Skip this line.
+        continue
+
+    thisKey, thisSale = data_mapped
+
+    if oldKey and oldKey != thisKey:
+        print oldKey, "\t", salesTotal
+        oldKey = thisKey;
+        salesTotal = 0
+
+    oldKey = thisKey
+    salesTotal += float(thisSale)
+    #salesTotal.append(thisSale)
+
+if oldKey != None:
+    print oldKey, "\t", salesTotal