小编dra*_*ons的帖子

尝试在你的Python 3.3.2 IDLE中输入这个,希望我不是唯一一个想知道并且我愿意理解为什么会这样的人.

>>> n = 331
>>> d = 165.0 # float number
>>> a = 174
>>> 
>>> a**d % n
Traceback (most recent call last):
  File "<pyshell#6>", line 1, in <module>
    a**d % n
OverflowError: (34, 'Result too large')

>>> d = int(d)
>>> a**d % n
330

浮标究竟是如何工作的,为什么会发生这种情况？谢谢.

让我通过我的确切代码:这是短模块

class SentenceSplitter:

def __init__(self, filename=None):
    self._raw_text = self.raw_text(filename)
    self._sentences = self.to_sentences()


def raw_text(self, filename):
    text = ''
    with open(filename, 'r') as file:
        for line in file.readlines():
            line = line.strip()
            text += ''.join(line.replace(line, line+' '))
    file.close()
    text = text.strip() # Deal with the last whitespace
    return text

def to_sentences(self):
    """ Sentence boundaries occur at '.', '!', '?' except that,
    there are some not-sentence boundaries that
    may occur before/after the period.
    """
    raw_text = self._raw_text
    sentences = []
    sentence = '' …

所以我有一个TerrainManager类,它会TerrainStructure在列表中存储很少的对象.我有一个方法,在TerrainStructure类中称为generate_pillar_points()它用于设置属性的x, y值TerrainStructure.

我应该分配属性来引用类吗？我认为这可能是一个很好的方法,因为我可以查看属性并看到它将是一个Point对象.或者我应该将默认值设置为None或0,稍后,当我调用generate_pillar_points()将这些属性设置为Point类的实例时

考虑到这一点,我问这个问题:

a = Cls # reference to Cls

a = Cls() # instance of Cls

这是代码,我相信我会更清楚我要问的问题.

class Point(object):
    def __init__(self, x, y):
        self.x, self.y = x, y

class TerrainStructure(object):
    def __init__(self):
        # what default values should this points have?
        self.top_left, self.top_right = Point, Point
        self.bottom_left, self.bottom_right = Point, Point

        # picks 4 random points between fixed ranges
        # and …