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import six
__all__ = ('str_to_bytes',)
def str_to_bytes(value):
"""
Simply convert a string type to bytes if the value is a string
and is an instance of six.string_types but not of six.binary_type
in python2 struct.pack("<Q") is both string_types and binary_type but
in python3 struct.pack("<Q") is binary_type but not a string_types
:param value:
:param binary:
:return:
"""
if not isinstance(value, six.binary_type) and isinstance(value, six.string_types):
return value.encode()
return value
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