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fix landing page after a click #27

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19 changes: 16 additions & 3 deletions recogym/envs/abstract.py
Original file line number Diff line number Diff line change
Expand Up @@ -102,11 +102,21 @@ def reset(self, user_id=0):
# Record number of times each product seen for static policy calculation.
self.organic_views = np.zeros(self.config.num_products)

def generate_organic_sessions(self):
def generate_organic_sessions(self, initial_product = None):

# Initialize session.
session = OrganicSessions()

if initial_product is not None :
# If a product is specified, use it as initial page for the organic session
session.next(
DefaultContext(self.current_time, self.current_user_id),
initial_product
)

# Update markov state.
self.update_state()
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Time is not updated, thus BOTH events
Bandit (with Action ID = initial_product)
Organic (with the Product ID = initial_product)
will happen at the same time.

In the case when `initial_product is not None' and we update the state, the state could not be 'organic', that means that we could not generate pure/real Organic events (we do not enter to the following while loop).

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Time is updated in update_state. For the first organic event after a bandit event, it will be updated in the update_state command of the step function, just after a click has been drawn. Thus we won't encounter the problem of having a bandit event and an organic event at the same time.

We are in the organic state even though the initial_product is not None (we just choose how to start the organic session), thus the state update works as usual, and we are able to generate organic events, with the only difference that we can choose the initial page of the organic session, which could be useful just after a click.


while self.state == organic:
# Add next product view.
self.update_product_view()
Expand Down Expand Up @@ -179,10 +189,13 @@ def step(self, action_id):

if reward == 1:
self.state = organic # After a click, Organic Events always follow.

initial_product = action_id
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Why we mix up Bandit (action_id) with Organic?

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The goal is to land on the product that was clicked in the organic session that follows a successful bandit event. Currently, there is no relationship between the clicked product and the first organic item viewed afterwards.

else :
initial_product = None

# Markov state dependent logic.
if self.state == organic:
sessions = self.generate_organic_sessions()
sessions = self.generate_organic_sessions(initial_product)
else:
sessions = self.empty_sessions

Expand Down