operator level cache

.github/tests/lm_tests.py

@@ -5,6 +5,7 @@
 from tokenizers import Tokenizer
 
 import lotus
+from lotus.cache import CacheConfig, CacheFactory, CacheType
 from lotus.models import LM, SentenceTransformersRM
 from lotus.types import CascadeArgs
 
@@ -398,7 +399,7 @@ def test_custom_tokenizer():
 @pytest.mark.parametrize("model", get_enabled("gpt-4o-mini"))
 def test_cache(setup_models, model):
     lm = setup_models[model]
-    lotus.settings.configure(lm=lm, enable_cache=True)
+    lotus.settings.configure(lm=lm, enable_message_cache=True)
 
     # Check that "What is the capital of France?" becomes cached
     first_batch = [
@@ -427,7 +428,7 @@ def test_cache(setup_models, model):
 @pytest.mark.parametrize("model", get_enabled("gpt-4o-mini"))
 def test_disable_cache(setup_models, model):
     lm = setup_models[model]
-    lotus.settings.configure(lm=lm, enable_cache=False)
+    lotus.settings.configure(lm=lm, enable_message_cache=False)
 
     batch = [
         [{"role": "user", "content": "Hello, world!"}],
@@ -439,7 +440,7 @@ def test_disable_cache(setup_models, model):
     assert lm.stats.total_usage.cache_hits == 0
 
     # Now enable cache. Note that the first batch is not cached.
-    lotus.settings.configure(enable_cache=True)
+    lotus.settings.configure(enable_message_cache=True)
     first_responses = lm(batch).outputs
     assert lm.stats.total_usage.cache_hits == 0
     second_responses = lm(batch).outputs
@@ -450,7 +451,7 @@ def test_disable_cache(setup_models, model):
 @pytest.mark.parametrize("model", get_enabled("gpt-4o-mini"))
 def test_reset_cache(setup_models, model):
     lm = setup_models[model]
-    lotus.settings.configure(lm=lm, enable_cache=True)
+    lotus.settings.configure(lm=lm, enable_message_cache=True)
 
     batch = [
         [{"role": "user", "content": "Hello, world!"}],
@@ -472,3 +473,120 @@ def test_reset_cache(setup_models, model):
     assert lm.stats.total_usage.cache_hits == 3
     lm(batch)
     assert lm.stats.total_usage.cache_hits == 3
+
+
+@pytest.mark.parametrize("model", get_enabled("gpt-4o-mini"))
+def test_operator_cache(setup_models, model):
+    cache_config = CacheConfig(cache_type=CacheType.SQLITE, max_size=1000)
+    cache = CacheFactory.create_cache(cache_config)
+
+    lm = LM(model="gpt-4o-mini", cache=cache)
+    lotus.settings.configure(lm=lm, enable_message_cache=True, enable_operator_cache=True)
+
+    data = {
+        "Course Name": [
+            "Dynamics and Control of Chemical Processes",
+            "Optimization Methods in Engineering",
+            "Chemical Kinetics and Catalysis",
+            "Transport Phenomena and Separations",
+        ]
+    }
+
+    expected_response = pd.DataFrame(
+        {
+            "Course Name": [
+                "Dynamics and Control of Chemical Processes",
+                "Optimization Methods in Engineering",
+                "Chemical Kinetics and Catalysis",
+                "Transport Phenomena and Separations",
+            ],
+            "_map": [
+                "Process Dynamics and Control",
+                "Advanced Optimization Techniques in Engineering",
+                "Reaction Kinetics and Mechanisms",
+                "Fluid Mechanics and Mass Transfer",
+            ],
+        }
+    )
+
+    df = pd.DataFrame(data)
+    user_instruction = "What is a similar course to {Course Name}. Please just output the course name."
+
+    first_response = df.sem_map(user_instruction)
+    assert lm.stats.total_usage.operator_cache_hits == 0
+
+    second_response = df.sem_map(user_instruction)
+    assert lm.stats.total_usage.operator_cache_hits == 1
+
+    first_response["_map"] = first_response["_map"].str.replace(r"[^a-zA-Z\s]", "", regex=True).str.lower()
+    second_response["_map"] = second_response["_map"].str.replace(r"[^a-zA-Z\s]", "", regex=True).str.lower()
+    expected_response["_map"] = expected_response["_map"].str.replace(r"[^a-zA-Z\s]", "", regex=True).str.lower()
+
+    pd.testing.assert_frame_equal(first_response, second_response)
+    pd.testing.assert_frame_equal(first_response, expected_response)
+    pd.testing.assert_frame_equal(second_response, expected_response)
+
+    lm.reset_cache()
+    lm.reset_stats()
+    assert lm.stats.total_usage.operator_cache_hits == 0
+
+
+@pytest.mark.parametrize("model", get_enabled("gpt-4o-mini"))
+def test_disable_operator_cache(setup_models, model):
+    cache_config = CacheConfig(cache_type=CacheType.SQLITE, max_size=1000)
+    cache = CacheFactory.create_cache(cache_config)
+
+    lm = LM(model="gpt-4o-mini", cache=cache)
+    lotus.settings.configure(lm=lm, enable_message_cache=True, enable_operator_cache=False)
+
+    data = {
+        "Course Name": [
+            "Dynamics and Control of Chemical Processes",
+            "Optimization Methods in Engineering",
+            "Chemical Kinetics and Catalysis",
+            "Transport Phenomena and Separations",
+        ]
+    }
+
+    expected_response = pd.DataFrame(
+        {
+            "Course Name": [
+                "Dynamics and Control of Chemical Processes",
+                "Optimization Methods in Engineering",
+                "Chemical Kinetics and Catalysis",
+                "Transport Phenomena and Separations",
+            ],
+            "_map": [
+                "Process Dynamics and Control",
+                "Advanced Optimization Techniques in Engineering",
+                "Reaction Kinetics and Mechanisms",
+                "Fluid Mechanics and Mass Transfer",
+            ],
+        }
+    )
+
+    df = pd.DataFrame(data)
+    user_instruction = "What is a similar course to {Course Name}. Please just output the course name."
+
+    first_response = df.sem_map(user_instruction)
+    assert lm.stats.total_usage.operator_cache_hits == 0
+
+    second_response = df.sem_map(user_instruction)
+    assert lm.stats.total_usage.operator_cache_hits == 0
+
+    pd.testing.assert_frame_equal(first_response, second_response)
+
+    # Now enable operator cache.
+    lotus.settings.configure(enable_operator_cache=True)
+    first_responses = df.sem_map(user_instruction)
+    first_responses["_map"] = first_responses["_map"].str.replace(r"[^a-zA-Z\s]", "", regex=True).str.lower()
+    assert lm.stats.total_usage.operator_cache_hits == 0
+    second_responses = df.sem_map(user_instruction)
+    second_responses["_map"] = second_responses["_map"].str.replace(r"[^a-zA-Z\s]", "", regex=True).str.lower()
+    assert lm.stats.total_usage.operator_cache_hits == 1
+
+    expected_response["_map"] = expected_response["_map"].str.replace(r"[^a-zA-Z\s]", "", regex=True).str.lower()
+
+    pd.testing.assert_frame_equal(first_responses, second_responses)
+    pd.testing.assert_frame_equal(first_responses, expected_response)
+    pd.testing.assert_frame_equal(second_responses, expected_response)

docs/configurations.rst

@@ -21,12 +21,12 @@ Using the Settings module
 Configurable Parameters
 --------------------------
 
-1. enable_cache: 
+1. enable_message_cache: 
     * Description: Enables or Disables cahcing mechanisms
     * Default: False
 .. code-block:: python
 
-    lotus.settings.configure(enable_cache=True)
+    lotus.settings.configure(enable_message_cache=True)
 
 2. setting RM:
     * Description: Configures the retrieval model

examples/model_examples/cache.py

@@ -11,7 +11,7 @@
 
 lm = LM(model="gpt-4o-mini", cache=cache)
 
-lotus.settings.configure(lm=lm, enable_cache=True)  # default caching is False
+lotus.settings.configure(lm=lm, enable_message_cache=True)  # default caching is False
 data = {
     "Course Name": [
         "Probability and Random Processes",

lotus/cache.py

@@ -1,3 +1,5 @@
+import hashlib
+import json
 import os
 import pickle
 import sqlite3
@@ -8,6 +10,8 @@
 from functools import wraps
 from typing import Any, Callable
 
+import pandas as pd
+
 import lotus
 
 
@@ -16,13 +20,52 @@ def require_cache_enabled(func: Callable) -> Callable:
 
     @wraps(func)
     def wrapper(self, *args, **kwargs):
-        if not lotus.settings.enable_cache:
+        if not lotus.settings.enable_message_cache:
             return None
         return func(self, *args, **kwargs)
 
     return wrapper
 
 
+def operator_cache(func: Callable) -> Callable:
+    """Decorator to add operator level caching."""
+
+    @wraps(func)
+    def wrapper(self, *args, **kwargs):
+        model = lotus.settings.lm
+        use_operator_cache = lotus.settings.enable_operator_cache
+
+        if use_operator_cache and model.cache:
+
+            def serialize(value):
+                if isinstance(value, pd.DataFrame):
+                    return value.to_json()
+                elif hasattr(value, "dict"):
+                    return value.dict()
+                return value
+
+            serialized_kwargs = {key: serialize(value) for key, value in kwargs.items()}
+            serialized_args = [serialize(arg) for arg in args]
+            cache_key = hashlib.sha256(
+                json.dumps({"args": serialized_args, "kwargs": serialized_kwargs}, sort_keys=True).encode()
+            ).hexdigest()
+
+            cached_result = model.cache.get(cache_key)
+            if cached_result is not None:
+                lotus.logger.debug(f"Cache hit for {cache_key}")
+                model.stats.total_usage.operator_cache_hits += 1
+                return cached_result
+            lotus.logger.debug(f"Cache miss for {cache_key}")
+
+            result = func(self, *args, **kwargs)
+            model.cache.insert(cache_key, result)
+            return result
+
+        return func(self, *args, **kwargs)
+
+    return wrapper
+
+
 class CacheType(Enum):
     IN_MEMORY = "in_memory"
     SQLITE = "sqlite"

lotus/sem_ops/sem_agg.py

@@ -3,6 +3,7 @@
 import pandas as pd
 
 import lotus.models
+from lotus.cache import operator_cache
 from lotus.templates import task_instructions
 from lotus.types import LMOutput, SemanticAggOutput
 
@@ -148,6 +149,7 @@ def process_group(args):
         group, user_instruction, all_cols, suffix, progress_bar_desc = args
         return group.sem_agg(user_instruction, all_cols, suffix, None, progress_bar_desc=progress_bar_desc)
 
+    @operator_cache
     def __call__(
         self,
         user_instruction: str,

lotus/sem_ops/sem_cluster_by.py

@@ -4,6 +4,7 @@
 import pandas as pd
 
 import lotus
+from lotus.cache import operator_cache
 
 
 @pd.api.extensions.register_dataframe_accessor("sem_cluster_by")
@@ -19,6 +20,7 @@ def _validate(obj: Any) -> None:
         if not isinstance(obj, pd.DataFrame):
             raise AttributeError("Must be a DataFrame")
 
+    @operator_cache
     def __call__(
         self,
         col_name: str,
@@ -52,7 +54,7 @@ def __call__(
         self._obj["cluster_id"] = pd.Series(indices, index=self._obj.index)
         # if return_scores:
         #     self._obj["centroid_sim_score"] = pd.Series(scores, index=self._obj.index)
-        
+
         # if return_centroids:
         #     return self._obj, centroids
         # else:

lotus/sem_ops/sem_extract.py

@@ -3,6 +3,7 @@
 import pandas as pd
 
 import lotus
+from lotus.cache import operator_cache
 from lotus.models import LM
 from lotus.templates import task_instructions
 from lotus.types import LMOutput, SemanticExtractOutput, SemanticExtractPostprocessOutput
@@ -33,7 +34,6 @@ def sem_extract(
     Returns:
         SemanticExtractOutput: The outputs, raw outputs, and quotes.
     """
-
     # prepare model inputs
     inputs = []
     for doc in docs:
@@ -72,6 +72,7 @@ def _validate(obj: pd.DataFrame) -> None:
         if not isinstance(obj, pd.DataFrame):
             raise AttributeError("Must be a DataFrame")
 
+    @operator_cache
     def __call__(
         self,
         input_cols: list[str],

lotus/sem_ops/sem_filter.py

@@ -5,6 +5,7 @@
 from numpy.typing import NDArray
 
 import lotus
+from lotus.cache import operator_cache
 from lotus.templates import task_instructions
 from lotus.types import CascadeArgs, LMOutput, LogprobsForFilterCascade, SemanticFilterOutput
 from lotus.utils import show_safe_mode
@@ -134,6 +135,7 @@ def _validate(obj: Any) -> None:
         if not isinstance(obj, pd.DataFrame):
             raise AttributeError("Must be a DataFrame")
 
+    @operator_cache
     def __call__(
         self,
         user_instruction: str,

lotus/sem_ops/sem_join.py

@@ -4,6 +4,7 @@
 from tqdm import tqdm
 
 import lotus
+from lotus.cache import operator_cache
 from lotus.templates import task_instructions
 from lotus.types import CascadeArgs, SemanticJoinOutput
 from lotus.utils import show_safe_mode
@@ -234,7 +235,6 @@ def sem_join_cascade(
             cot_reasoning=cot_reasoning,
             default=default,
             strategy=strategy,
-            show_progress_bar=False,
         )
         pbar.update(num_large)
         pbar.close()
@@ -545,6 +545,7 @@ def _validate(obj: Any) -> None:
         if not isinstance(obj, pd.DataFrame):
             raise AttributeError("Must be a DataFrame")
 
+    @operator_cache
     def __call__(
         self,
         other: pd.DataFrame | pd.Series,

lotus/sem_ops/sem_map.py

@@ -3,6 +3,7 @@
 import pandas as pd
 
 import lotus
+from lotus.cache import operator_cache
 from lotus.templates import task_instructions
 from lotus.types import LMOutput, SemanticMapOutput, SemanticMapPostprocessOutput
 from lotus.utils import show_safe_mode
@@ -80,6 +81,7 @@ def _validate(obj: pd.DataFrame) -> None:
         if not isinstance(obj, pd.DataFrame):
             raise AttributeError("Must be a DataFrame")
 
+    @operator_cache
     def __call__(
         self,
         user_instruction: str,

lotus/sem_ops/sem_search.py

@@ -3,6 +3,7 @@
 import pandas as pd
 
 import lotus
+from lotus.cache import operator_cache
 from lotus.types import RerankerOutput, RMOutput
 
 
@@ -19,6 +20,7 @@ def _validate(obj: Any) -> None:
         if not isinstance(obj, pd.DataFrame):
             raise AttributeError("Must be a DataFrame")
 
+    @operator_cache
     def __call__(
         self,
         col_name: str,