大神报这个错：DeprecationWarning: The truth value of an empty array is ambiguous. Returning False, but in future this will result in an error. Use array.size > 0 to check that an array is not empty.

[fengt12]

大神，请教个问题，clf.predict的时候报错：
DeprecationWarning: The truth value of an empty array is ambiguous. Returning False, but in future this will result in an error. Use array.size > 0 to check that an array is not empty.

会是什么原因呢，刚接触不是很懂，能否指点下

[cerebrumaize]

1.这是warning不是error啦.
2.在判断某个叫array的列表是否为空时,if array: ***以前可行,现在会被numpy提醒不要再这样做,判断该array是否是个空空列表要看array的size属性,而不是判断对象是否存在.