python函数-bytearray

英文说明:

Return a new array of bytes. The bytearray type is a mutable sequence of integers in the range 0

The optional source parameter can be used to initialize the array in a few different ways:

If it is a string, you must also give the encoding (and optionally, errors) parameters; bytearray() then converts the string to bytes using str.encode().

If it is an integer, the array will have that size and will be initialized with null bytes.

If it is an object conforming to the buffer interface, a read-only buffer of the object will be used to initialize the bytes array.

If it is an iterable, it must be an iterable of integers in the range 0

Without an argument, an array of size 0 is created.

New in version 2.6.

实例演示：

>>> a = bytearray(3)
>>> a
bytearray(b'\x00\x00\x00')
>>> a[0]
  
>>> a[1]
  
>>> a[2]
  
>>> b = bytearray("abc")
>>> b
bytearray(b'abc')
>>> b[0]
   
>>> b[1]
  
>>> b[2]
  
>>> c = bytearray([1, 2, 3])
>>> c
bytearray(b'\x01\x02\x03')
>>> c[0]
  
>>> c[1]
  
>>> c[2]
  
>>> d = bytearray(buffer("abc"))
>>> d
bytearray(b'abc')
>>> d[0]
  
>>> d[1]
  
>>> d[2] 

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