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https://github.com/velocitatem/PHANTOM.git
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c432c45343
* first implementation of elasticity demand computation * chor: fixing test :( * feature: rudemantary defintition of pricing pipeline * chor: fixing cross product missing data * add warning * feature: e2e pricing pipeline with inference
91 lines
3.5 KiB
Python
91 lines
3.5 KiB
Python
from sklearn.pipeline import Pipeline
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from sklearn.preprocessing import StandardScaler
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import pandas as pd
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import logging
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log = logging.getLogger(__name__)
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from extract import KafkaDataFetcher, ExperimentJoiner, EventTitleAugmenter, chunk_shared_data
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from mapping import SessionTransitionProbMatrixTransformer, render_graph
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from demand import DemandEstimator, ChunkInteractionsIntoSteps
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from elasticity import TemporalElasticityEstimator, aggregate_price_logs
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# elasticity pipeline components (not sklearn compatible, manual orchestration)
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def elasticity_pipeline(interactions_df, price_logs_df, window_size='30s', store_mode='hotel'):
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"""
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Compute price elasticity from interaction and price data.
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Args:
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interactions_df: raw interaction data from demand_data_pipeline
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price_logs_df: price log data from price_data_pipeline
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window_size: time window for chunking
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store_mode: 'hotel' or 'airline'
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Returns:
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df with [productId, elasticity, std_error, n_obs]
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"""
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# step 1: chunk interactions into time windows
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chunker = ChunkInteractionsIntoSteps(window_size=window_size, return_metadata=True)
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interaction_chunks = chunker.transform(interactions_df)
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log.info(f"Chunked interactions into {len(interaction_chunks)} windows of size {window_size}")
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if not interaction_chunks:
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return None
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# step 2: compute demand per window
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demand_estimator = DemandEstimator(store_mode=store_mode)
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demand_chunks = []
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for chunk in interaction_chunks:
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demand_vector = demand_estimator.transform(chunk['data'])
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demand_chunks.append({
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'window_start': chunk['window_start'],
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'window_end': chunk['window_end'],
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'demand_vector': demand_vector # each has a full list of all products, even if demand is 0
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})
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# [q_chunk1, q_chunk2, ...]
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# step 3: aggregate price logs into windows
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price_chunks = aggregate_price_logs(price_logs_df, window_size=window_size)
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# step 4: compute elasticity
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elasticity_estimator = TemporalElasticityEstimator(method='point', min_observations=2)
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elasticity_df = elasticity_estimator.transform(demand_chunks, price_chunks, store_mode=store_mode)
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return elasticity_df
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# exposable pipelines
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interaction_pipeline = Pipeline([
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('kafka_fetch', KafkaDataFetcher(topic='user-interactions')),
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('experiment_join', ExperimentJoiner()),
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('event_augment', EventTitleAugmenter()),
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])
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price_data_pipeline = Pipeline([
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('kafka_fetch', KafkaDataFetcher(topic='price-logs')),
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])
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# interaction_data + price_data -> elasticity (demand)
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# elasticity -> pricing
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pricing_pipeline = Pipeline([
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('demand_estimation', DemandEstimator()),
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])
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if __name__ == "__main__":
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# fetch both datasets
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interaction_data = interaction_pipeline.fit_transform(None)
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pricing_data = price_data_pipeline.fit_transform(None)
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if interaction_data.empty or pricing_data.empty:
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print("Insufficient data for elasticity computation"); exit(0)
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# compute elasticity via unified pipeline
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window_size = "30s"
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elasticity_results = elasticity_pipeline(interaction_data, pricing_data, window_size=window_size)
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elasticity_value_array = elasticity_results['elasticity'].values if elasticity_results is not None else np.array([])
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print(elasticity_value_array)
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if elasticity_results is not None and not elasticity_results.empty:
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print(elasticity_results.to_string(index=False))
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else:
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print("\nInsufficient data for elasticity computation")
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