Timothy had been writing transformation loops for weeks—iterate through books, extract some data, build a new collection. His code worked, but it was verbose. Three or four lines to accomplish what felt like a single thought: "give me all the titles from recent books."
Margaret found him writing yet another loop to build a list. "You're weaving by hand," she observed, leading him to a room filled with elaborate mechanical looms—the Pattern Factory. "Python provides pattern looms that weave collections in a single expression. They're called comprehensions, and they turn iteration patterns into readable, declarative code."
Timothy's exploration of comprehensions revealed Python's declarative approach to collection building.
The Pattern Looms wove data transformations into single expressions, turning verbose loops into readable declarations of intent. Like mechanical looms in the Victorian library that wove intricate patterns automatically, comprehensions automated the common pattern: iterate, transform, filter, collect.
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