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Concatenating lists within a range using list comprehensions

Python/Codingeasy0.2 min readPremium
Frequency
Low
Asked at 1 company
Category
179
questions in Python/Coding
Difficulty Split
127E|24M|28H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Tiger Analytics
Interview Pro Tip

Pro-Move: chain.from_iterable for lazy flatten. Red Flag: Deep nested comprehensions hurting readability.

Expert AnswerPremium
38 wordsInterview-ready
**Flatten:** `[item for sublist in lists for item in sublist]` or `list(chain(*lists))`. **Range:** `[x for start,end in ranges for x in range(start,end+1)]`. **Nested:** Outer iterates first. **Why:** Readability; `chain` for many lists....
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