Modular•13mo ago

Cannot run a Fibonacci sequence function in the Playground.

I just copied a simple Python function to a playground cell, and the code won't run, and gives me the error:

expression failed to parse (no further compiler diagnostics)

The function is a run-of-the-mill array based Fibonacci sequence generator. Why does this not run? (I am very new to Mojo and the playground)

fn fib1(n):                # I tried both def and fn
    if n == 0:
        return []
    elif n == 1:
        return [0]
    elif n == 2:
        return [0, 1]
    else:
        fibs = [0, 1]
        for i in range(2, n):
            fibs.append(fibs[-1] + fibs[-2])
        return fibs

fn fib1(n):                # I tried both def and fn
    if n == 0:
        return []
    elif n == 1:
        return [0]
    elif n == 2:
        return [0, 1]
    else:
        fibs = [0, 1]
        for i in range(2, n):
            fibs.append(fibs[-1] + fibs[-2])
        return fibs

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Cannot run a Fibonacci sequence function in the Playground.