List, dict, and set comprehensions plus common built in data structure methods, each explained with a short example.
35 cards · basic cards · AI-written, checked twice. Edit anything.
- What is the syntax for a basic list comprehension?
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[expression for item in iterable]- How do you add a condition to a list comprehension?
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[expression for item in iterable if condition]- Write a list comprehension that squares numbers 1 to 5
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[x**2 for x in range(1, 6)]- Write a list comprehension that keeps only even numbers from 0 to 10
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[x for x in range(11) if x % 2 == 0]- How do you write nested loops in a list comprehension?
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[x + y for x in list1 for y in list2]- What does [x if x > 0 else 0 for x in nums] do?
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Replaces negative numbers with 0, keeps positive numbers- Write a list comprehension that converts strings to integers, keeping only valid ones
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[int(x) for x in strings if x.isdigit()]- What is the syntax for a dict comprehension?
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{key: value for item in iterable}- Write a dict comprehension that maps numbers to their squares
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{x: x**2 for x in range(1, 6)}- How do you add a condition to a dict comprehension?
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{key: value for item in iterable if condition}- Write a dict comprehension that swaps keys and values from an existing dict
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{v: k for k, v in original_dict.items()}- Write a dict comprehension using zip to pair two lists
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{k: v for k, v in zip(keys, values)}- What is the syntax for a set comprehension?
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{expression for item in iterable}- Write a set comprehension that gets unique letters from a string
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{char for char in 'hello world'}- How do you add a condition to a set comprehension?
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{expression for item in iterable if condition}
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