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KwickClips Python · 40 sec · free

What does get(r, 0) do?

Short answer. It returns the current count of r, or 0 if r is not in the dictionary yet.

What is stored as the dictionary key?

The item being counted.

Remember

Key: the run; value: its count
get(r, 0) avoids KeyError

Count every run in an over, in one loop. F is the frequency dictionary. Get returns the count so far, or zero. Add one each time. Remember two things. The key is the run, the value is its count. Get avoids a key error.

This clip is from the full lesson: List Programs: Maximum, Minimum, Mean, Linear Search and Frequency — 7 minutes, with the tables, the quick answers and the whole lesson in text.

Useful for: CBSE Class 11 Computer Science (083), CBSE Class 11 Computer Science (083), CBSE Class 11 Computer Science Essentials (083), CBSE Class 11 Computer Science Essentials (083)

More KwickClips from this lesson

Code starting a variable at the first mark and replacing it with any bigger mark.Why not start at 0?40 secA pointer moving along a list from index 0 until it matches 91 at index 2.Where does linear search start?41 secA loop multiplying each list value by its index, totalling 40.What does p hold in the loop?43 sec
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