Python NameError: name is not defined (related to having default input argume...

shaoheshaohe

def circularFind(myByteArray, searchVal, start=0, end=len(myByteArray)):   
"""    Return the first-encountered index in bytearray where searchVal     is found, searching to the right, in incrementing-index order, and    wrapping over the top and back to the beginning if index end <     index start    """   
if (end >= start):        
     return myByteArray.find(searchVal, start, end)   
else:
#end < start, so search to highest index in bytearray, and then wrap around and search to "end" if nothing was found         
     index = myByteArray.find(searchVal, start, len(myByteArray))
        
if (index == -1):            
#if searchVal not found yet, wrap around and keep searching            
     index = myByteArray.find(searchVal, 0, end)        
return index             
               

错误：

NameError：未定义名称'myByteArray'

但是，如果我只删除我的默认参数（= 0和= len（myByteArray）），它可以正常工作。但是......我真的想要那些默认参数，以便start和end参数是可选的。我该怎么办？


修改：

def circularFind(myByteArray, searchVal, start=0, end=None):
    """    Return the first-encountered index in bytearray where searchVal     is found, searching to the right, in incrementing-index order, and    wrapping over the top and back to the beginning if index end <     index start    """   
if end is None:        
     end = len(myByteArray)   
# continue doing what you were doing