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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def patch_os_module():
 	""" 	jaraco.windows provides the os.symlink and os.readlink functions. 	Monkey-patch the os module to include them if not present. 	"""

	if not hasattr(os, 'symlink'):
		os.symlink = symlink
		os.path.islink = islink
	if not hasattr(os, 'readlink'):
		os.readlink = readlink