Is there more efficient way to get one dimensional list from list containing arrays nested to any level (infinite dimensions)?

Question

Flatten the Array

def isiterable(anyObject):
    if hasattr(anyObject, '__iter__') and not type(anyObject) is str:
        if len(anyObject) > 0:
            if not next(iter(anyObject)) == anyObject:
                return True
    else:
        return False

def flattenArrayN(inputArray, flatList=0):
    if flatList == 0:
        flatList = []
    for item in inputArray:
        if isiterable(item):
            if type(item) is dict:
                for pair in item.items():
                    flattenArrayN(pair, flatList)
            else:
                flattenArrayN(item, flatList)
        else:
            flatList.append(item)
    
    return flatList

The code works for an type of array, which is very important.

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