repr.py 文件源码

def repr_instance(self, x, level):
        try:
            s = __builtin__.repr(x)
            # Bugs in x.__repr__() can cause arbitrary
            # exceptions -- then make up something
        except Exception:
            return '<%s instance at %x>' % (x.__class__.__name__, id(x))
        if len(s) > self.maxstring:
            i = max(0, (self.maxstring-3)//2)
            j = max(0, self.maxstring-3-i)
            s = s[:i] + '...' + s[len(s)-j:]
        return s