Counter and for loops

I am writing a piece of code that iterates through each record and prints a statistic called intervals.

for record in records:

    from collections import Counter
    count = Counter(intervals)

    for interval, frequency in count.iteritems():
        print interval
        print frequency

The output looks like this:

Record 1
199
7
200
30

Record 2
199
6
200
30

In this example, in Record 1, there are 7 instances of the interval length 199 and 30 instances of the interval length 200. In Record 2, there are 6 instances of the interval length 199 and 31 instances of the interval length 200. I would like to see the overall stat summary of both records like this but cannot figure out how to get these results:

All Records

199
13

200
61

Where in both records, there are 13 instances total of interval length 199 (7+6) and 61 instances total of interval length 200 (30+31). I am having trouble getting the overall statistic summary of my records as shown above.

You need variable outside for loop that store the frequency counting Following example may help you.

from collections import Counter


records = [[199,200,200], [200,199,200]]
freq_dist = Counter()                        # Variable store frequency distribution

for record in records:
    counts = Counter(record)
    freq_dist.update(counts)

for freq, value in freq_dist.items():
   print(freq, value)

Output:

200 4
199 2

Reference collections.Counter