Error pop_layer() Model

[Jhon Intriago]

extracted_features.py

model.pop_layer()
AttributeError: 'Sequential' object has no attribute 'pop_layer'

Keras 1.1.1

[Alberto Montes]

The version of Keras used is a fork with some modifications:
pip install git+https://github.com/albertomontesg/keras.git@improved-3d-ops
or install the requirements.txt
pip install -r requirements.txt