How to use 'python from_bytes' in Python

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109def from_bytes(value):
110 """Converts bytes to a string value, if necessary.
111
112 Args:
113 value (Union[str, bytes]): The value to be converted.
114
115 Returns:
116 str: The original value converted to unicode (if bytes) or as passed in
117 if it started out as unicode.
118
119 Raises:
120 ValueError: If the value could not be converted to unicode.
121 """
122 result = value.decode("utf-8") if isinstance(value, six.binary_type) else value
123 if isinstance(result, six.text_type):
124 return result
125 else:
126 raise ValueError("{0!r} could not be converted to unicode".format(value))
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