import re
buffer = 'my_path: any_suffix'
share_path = '\\\\server\\final'
buffer = re.sub('my_path:.*', r'my_path: {}'.format(share_path.replace("\\", "\\\\")), buffer)
print(buffer)
aW1wb3J0IHJlCmJ1ZmZlciA9ICdteV9wYXRoOiBhbnlfc3VmZml4JwpzaGFyZV9wYXRoID0gJ1xcXFxzZXJ2ZXJcXGZpbmFsJwpidWZmZXIgPSByZS5zdWIoJ215X3BhdGg6LionLCByJ215X3BhdGg6IHt9Jy5mb3JtYXQoc2hhcmVfcGF0aC5yZXBsYWNlKCJcXCIsICJcXFxcIikpLCBidWZmZXIpCnByaW50KGJ1ZmZlcik=