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原标题:keep only one exit of a function when there is multiple if statements
  • 时间:2012-01-13 09:51:34
  •  标签:
  • python

如果发言含有多个功能,只保留一个功能似乎是一种良好做法。 我可以使用同在别的语种,例如:

function a() {
    do {
        if (...) break;
        ...
        if (...) break;
        ...
    } while (FALSE);
    ...
    return;
}

如何在座? 虽然我可以使用(停火)时间,但如果没有断断断线,那就是一个死.。

while True:
    if ...: break
    ...
    if ...: break
    ...
    # oops, miss the  break , you re dead

是否有更长的办法来做到这一点?

PS:进一步说明一个经验:

function a() {
    if (...) { $a = 1; log($a); return $a; }
    if (...) { $a = 2; log($a); return $a; }
    if (...) { $a = 3; log($a); return $a; }
}

function a() {
    do {
        if (...) { $a = 1; break; }
        if (...) { $a = 2; break; }
        if (...) { $a = 3; break; }
    } while (FALSE);
    log($a);
    return $a;
}

希望你们看到差异......

最佳回答
问题回答

我认为,虽然 lo不平,是你重新寻找的东西的难得途径。 为什么不只使用当地变量?

def f(x):
  result = None

  if (...): result = 1
  elif (...): result = 2
  elif (...): result = 3
  else: result = 4

  log(result)
  return result

实现你所提到的目标——记录回报价值——的更富 Python的方法是把整个功能归为cor器。 例如:

from functools import wraps

def print_return(fn):
    @wraps(fn)
    def wrapped(*args, **kwargs):
        return_value = fn(*args, **kwargs)
        print return_value
        return return_value
    return wrapped


@print_return
def foo(a, b):
    return a + b




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