_iotools.py 文件源码

def _strict_call(self, value):
        try:

            # We check if we can convert the value using the current function
            new_value = self.func(value)

            # In addition to having to check whether func can convert the
            # value, we also have to make sure that we don't get overflow
            # errors for integers.
            if self.func is int:
                try:
                    np.array(value, dtype=self.type)
                except OverflowError:
                    raise ValueError

            # We're still here so we can now return the new value
            return new_value

        except ValueError:
            if value.strip() in self.missing_values:
                if not self._status:
                    self._checked = False
                return self.default
            raise ValueError("Cannot convert string '%s'" % value)
    #