In light of two problems in the release of the Python SDK 1.2.6, version 1.2.7 is introduced. This is just a bugfix release with minimal changes (without adding new functionality), all users of the Google App for Python are recommended to update the SDK.
These two problems were:
-In release 1.2.6, a key argument was added to the designer of the class of the model, breaking the work of the subclasses that requested the private variables of the constructor with positional (not named) values. A correction was made to restore the original way of organizing and establishing a new key argument only as named.
-In release 1.2.6, the interaction between remote_api and the local developer server was broken.
Actually, both problems are fixed in release 1.2.7.
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The version of the Google App for Java has not changed.
Source -
Google Developer Blog