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#python #sicp
Like local assignment, local def statements only affect the current local frame. These functions are only in scope while sqrt is being evaluated. Consistent with our evaluation procedure, these local def statements don't even get evaluated until sqrt is called.
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1.6 Higher-Order Functions
de the body of other definitions. >>> def sqrt(a): def sqrt_update(x): return average(x, a/x) def sqrt_close(x): return approx_eq(x * x, a) return improve(sqrt_update, sqrt_close) <span>Like local assignment, local def statements only affect the current local frame. These functions are only in scope while sqrt is being evaluated. Consistent with our evaluation procedure, these local def statements don't even get evaluated until sqrt is called. Lexical scope. Locally defined functions also have access to the name bindings in the scope in which they are defined. In this example, sqrt_update refers to the name a , which is


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