functional.py 文件源码

def iif(condition,truepart,falsepart=None,forward=False):
    """
    if condition is boolean return (falsepart,truepart)[condition]
    if condition is callable returns truepart if condition(tp) else falsepart
    if forward is True condition(truepart) is returned instead of truepart
    if forward is callable, forward(truepart) is returned instead
    """
    if isCallable(condition):
      v = condition(truepart)
      if not v: 
        return falsepart
    elif not condition: 
      return falsepart

    if isCallable(forward):
      return forward(truepart)
    elif forward:
      return v
    else:
      return truepart