python __builtins__ bool类 （6）

6、'bool',  函数用于将给定参数转换为布尔类型，如果没有参数，返回 False。

class bool(int)                                                                  # 继承于int类型
 |  bool(x) -> bool                                                              # 创建bool类型的对象
 |
 |  Returns True when the argument x is true, False otherwise.                   # 参数x为真返回True，否则返回False。
 |  The builtins True and False are the only two instances of the class bool.    # 内置True和False是仅有的2个bool类型的实例。
 |  The class bool is a subclass of the class int, and cannot be subclassed.     # bool类是int类的子类，不能被继承。
 |
 |  Method resolution order:                                                     # MRO-方法解析顺序
 |      bool
 |      int
 |      object
 |
 |  Methods defined here:
 |
 |  __and__(self, value, /)
 |      Return self&value.
 |
 |  __new__(*args, **kwargs) from builtins.type
 |      Create and return a new object.  See help(type) for accurate signature.
 |
 |  __or__(self, value, /)
 |      Return self|value.
 |
 |  __rand__(self, value, /)
 |      Return value&self.
 |
 |  __repr__(self, /)
 |      Return repr(self).
 |
 |  __ror__(self, value, /)
 |      Return value|self.
 |
 |  __rxor__(self, value, /)
 |      Return value^self.
 |
 |  __str__(self, /)
 |      Return str(self).
 |
 |  __xor__(self, value, /)
 |      Return self^value.
 |
 |  ----------------------------------------------------------------------
 |  Methods inherited from int:
 |
 |  __abs__(self, /)
 |      abs(self)
 |
 |  __add__(self, value, /)
 |      Return self+value.
 |
 |  __bool__(self, /)
 |      self != 0
 |
 |  __ceil__(...)
 |      Ceiling of an Integral returns itself.
 |
 |  __divmod__(self, value, /)
 |      Return divmod(self, value).
 |
 |  __eq__(self, value, /)
 |      Return self==value.
 |
 |  __float__(self, /)
 |      float(self)
 |
 |  __floor__(...)
 |      Flooring an Integral returns itself.
 |
 |  __floordiv__(self, value, /)
 |      Return self//value.
 |
 |  __format__(...)
 |      default object formatter
 |
 |  __ge__(self, value, /)
 |      Return self>=value.
 |
 |  __getattribute__(self, name, /)
 |      Return getattr(self, name).
 |
 |  __getnewargs__(...)
 |
 |  __gt__(self, value, /)
 |      Return self>value.
 |
 |  __hash__(self, /)
 |      Return hash(self).
 |
 |  __index__(self, /)
 |      Return self converted to an integer, if self is suitable for use as an index into a list.
 |
 |  __int__(self, /)
 |      int(self)
 |
 |  __invert__(self, /)
 |      ~self
 |
 |  __le__(self, value, /)
 |      Return self<=value.
 |
 |  __lshift__(self, value, /)
 |      Return self<<value.
 |
 |  __lt__(self, value, /)
 |      Return self<value.
 |
 |  __mod__(self, value, /)
 |      Return self%value.
 |
 |  __mul__(self, value, /)
 |      Return self*value.
 |
 |  __ne__(self, value, /)
 |      Return self!=value.
 |
 |  __neg__(self, /)
 |      -self
 |
 |  __pos__(self, /)
 |      +self
 |
 |  __pow__(self, value, mod=None, /)
 |      Return pow(self, value, mod).
 |
 |  __radd__(self, value, /)
 |      Return value+self.
 |
 |  __rdivmod__(self, value, /)
 |      Return divmod(value, self).
 |
 |  __rfloordiv__(self, value, /)
 |      Return value//self.
 |
 |  __rlshift__(self, value, /)
 |      Return value<<self.
 |
 |  __rmod__(self, value, /)
 |      Return value%self.
 |
 |  __rmul__(self, value, /)
 |      Return value*self.
 |
 |  __round__(...)
 |      Rounding an Integral returns itself.
 |      Rounding with an ndigits argument also returns an integer.
 |
 |  __rpow__(self, value, mod=None, /)
 |      Return pow(value, self, mod).
 |
 |  __rrshift__(self, value, /)
 |      Return value>>self.
 |
 |  __rshift__(self, value, /)
 |      Return self>>value.
 |
 |  __rsub__(self, value, /)
 |      Return value-self.
 |
 |  __rtruediv__(self, value, /)
 |      Return value/self.
 |
 |  __sizeof__(...)
 |      Returns size in memory, in bytes
 |
 |  __sub__(self, value, /)
 |      Return self-value.
 |
 |  __truediv__(self, value, /)
 |      Return self/value.
 |
 |  __trunc__(...)
 |      Truncating an Integral returns itself.
 |
 |  bit_length(...)
 |      int.bit_length() -> int
 |
 |      Number of bits necessary to represent self in binary.
 |      >>> bin(37)
 |      '0b100101'
 |      >>> (37).bit_length()
 |      6
 |
 |  conjugate(...)
 |      Returns self, the complex conjugate of any int.
 |
 |  from_bytes(...) from builtins.type
 |      int.from_bytes(bytes, byteorder, *, signed=False) -> int
 |
 |      Return the integer represented by the given array of bytes.
 |
 |      The bytes argument must be a bytes-like object (e.g. bytes or bytearray).
 |
 |      The byteorder argument determines the byte order used to represent the
 |      integer.  If byteorder is 'big', the most significant byte is at the
 |      beginning of the byte array.  If byteorder is 'little', the most
 |      significant byte is at the end of the byte array.  To request the native
 |      byte order of the host system, use `sys.byteorder' as the byte order value.
 |
 |      The signed keyword-only argument indicates whether two's complement is
 |      used to represent the integer.
 |
 |  to_bytes(...)
 |      int.to_bytes(length, byteorder, *, signed=False) -> bytes
 |
 |      Return an array of bytes representing an integer.
 |
 |      The integer is represented using length bytes.  An OverflowError is
 |      raised if the integer is not representable with the given number of
 |      bytes.
 |
 |      The byteorder argument determines the byte order used to represent the
 |      integer.  If byteorder is 'big', the most significant byte is at the
 |      beginning of the byte array.  If byteorder is 'little', the most
 |      significant byte is at the end of the byte array.  To request the native
 |      byte order of the host system, use `sys.byteorder' as the byte order value.
 |
 |      The signed keyword-only argument determines whether two's complement is
 |      used to represent the integer.  If signed is False and a negative integer
 |      is given, an OverflowError is raised.
 |
 |  ----------------------------------------------------------------------
 |  Data descriptors inherited from int:
 |
 |  denominator
 |      the denominator of a rational number in lowest terms
 |
 |  imag
 |      the imaginary part of a complex number
 |
 |  numerator
 |      the numerator of a rational number in lowest terms
 |
 |  real
 |      the real part of a complex number