Bases: BaseMemory
A simple composition of potentially several memory sources.
This composable memory considers one of the memory sources as the main
one and the others as secondary. The secondary memory sources get added to
the chat history only in either the system prompt or to the first user
message within the chat history.
Parameters:
| Name |
Type |
Description |
Default |
primary_memory |
|
(BaseMemory) The main memory buffer for agent.
|
required
|
secondary_memory_sources |
|
(List(BaseMemory)) Secondary memory sources.
Retrieved messages from these sources get added to the system prompt message.
|
required
|
Source code in llama-index-core/llama_index/core/memory/simple_composable_memory.py
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147 | class SimpleComposableMemory(BaseMemory):
"""A simple composition of potentially several memory sources.
This composable memory considers one of the memory sources as the main
one and the others as secondary. The secondary memory sources get added to
the chat history only in either the system prompt or to the first user
message within the chat history.
Args:
primary_memory: (BaseMemory) The main memory buffer for agent.
secondary_memory_sources: (List(BaseMemory)) Secondary memory sources.
Retrieved messages from these sources get added to the system prompt message.
"""
primary_memory: BaseMemory = Field(
description="Primary memory source for chat agent.",
)
secondary_memory_sources: List[BaseMemory] = Field(
default_factory=list, description="Secondary memory sources."
)
@classmethod
def class_name(cls) -> str:
"""Class name."""
return "SimpleComposableMemory"
@classmethod
def from_defaults(
cls,
primary_memory: Optional[BaseMemory] = None,
secondary_memory_sources: Optional[List[BaseMemory]] = None,
) -> "SimpleComposableMemory":
"""Create a simple composable memory from an LLM."""
primary_memory = primary_memory or ChatMemoryBuffer.from_defaults()
secondary_memory_sources = secondary_memory_sources or []
return cls(
primary_memory=primary_memory,
secondary_memory_sources=secondary_memory_sources,
)
def _format_secondary_messages(
self, secondary_chat_histories: List[List[ChatMessage]]
) -> str:
"""Formats retrieved historical messages into a single string."""
# TODO: use PromptTemplate for this
formatted_history = "\n\n" + DEFAULT_INTRO_HISTORY_MESSAGE + "\n"
for ix, chat_history in enumerate(secondary_chat_histories):
formatted_history += (
f"\n=====Relevant messages from memory source {ix + 1}=====\n\n"
)
for m in chat_history:
formatted_history += f"\t{m.role.upper()}: {m.content}\n"
formatted_history += (
f"\n=====End of relevant messages from memory source {ix + 1}======\n\n"
)
formatted_history += DEFAULT_OUTRO_HISTORY_MESSAGE
return formatted_history
def get(self, input: Optional[str] = None, **kwargs: Any) -> List[ChatMessage]:
"""Get chat history."""
return self._compose_message_histories(input, **kwargs)
def _compose_message_histories(
self, input: Optional[str] = None, **kwargs: Any
) -> List[ChatMessage]:
"""Get chat history."""
# get from primary
messages = self.primary_memory.get(input=input, **kwargs)
# get from secondary
# TODO: remove any repeated messages in secondary and primary memory
secondary_histories = []
for mem in self.secondary_memory_sources:
secondary_history = mem.get(input, **kwargs)
secondary_history = [m for m in secondary_history if m not in messages]
if len(secondary_history) > 0:
secondary_histories.append(secondary_history)
# format secondary memory
if len(secondary_histories) > 0:
single_secondary_memory_str = self._format_secondary_messages(
secondary_histories
)
# add single_secondary_memory_str to chat_history
if len(messages) > 0 and messages[0].role == MessageRole.SYSTEM:
system_message = messages[0].content.split(
DEFAULT_INTRO_HISTORY_MESSAGE
)[0]
messages[0] = ChatMessage(
content=system_message.strip() + single_secondary_memory_str,
role=MessageRole.SYSTEM,
)
else:
messages.insert(
0,
ChatMessage(
content="You are a helpful assistant."
+ single_secondary_memory_str,
role=MessageRole.SYSTEM,
),
)
return messages
def get_all(self) -> List[ChatMessage]:
"""Get all chat history.
Uses primary memory get_all only.
"""
return self.primary_memory.get_all()
def put(self, message: ChatMessage) -> None:
"""Put chat history."""
self.primary_memory.put(message)
for mem in self.secondary_memory_sources:
mem.put(message)
def set(self, messages: List[ChatMessage]) -> None:
"""Set chat history."""
self.primary_memory.set(messages)
for mem in self.secondary_memory_sources:
# finalize task often sets, but secondary memory is meant for
# long-term memory rather than main chat memory buffer
# so use put_messages instead
mem.put_messages(messages)
def reset(self) -> None:
"""Reset chat history."""
self.primary_memory.reset()
for mem in self.secondary_memory_sources:
mem.reset()
|
class_name
classmethod
Class name.
Source code in llama-index-core/llama_index/core/memory/simple_composable_memory.py
| @classmethod
def class_name(cls) -> str:
"""Class name."""
return "SimpleComposableMemory"
|
from_defaults
classmethod
Create a simple composable memory from an LLM.
Source code in llama-index-core/llama_index/core/memory/simple_composable_memory.py
40
41
42
43
44
45
46
47
48
49
50
51
52
53 | @classmethod
def from_defaults(
cls,
primary_memory: Optional[BaseMemory] = None,
secondary_memory_sources: Optional[List[BaseMemory]] = None,
) -> "SimpleComposableMemory":
"""Create a simple composable memory from an LLM."""
primary_memory = primary_memory or ChatMemoryBuffer.from_defaults()
secondary_memory_sources = secondary_memory_sources or []
return cls(
primary_memory=primary_memory,
secondary_memory_sources=secondary_memory_sources,
)
|
get
get(input: Optional[str] = None, **kwargs: Any) -> List[ChatMessage]
Get chat history.
Source code in llama-index-core/llama_index/core/memory/simple_composable_memory.py
| def get(self, input: Optional[str] = None, **kwargs: Any) -> List[ChatMessage]:
"""Get chat history."""
return self._compose_message_histories(input, **kwargs)
|
get_all
Get all chat history.
Uses primary memory get_all only.
Source code in llama-index-core/llama_index/core/memory/simple_composable_memory.py
| def get_all(self) -> List[ChatMessage]:
"""Get all chat history.
Uses primary memory get_all only.
"""
return self.primary_memory.get_all()
|
put
Put chat history.
Source code in llama-index-core/llama_index/core/memory/simple_composable_memory.py
| def put(self, message: ChatMessage) -> None:
"""Put chat history."""
self.primary_memory.put(message)
for mem in self.secondary_memory_sources:
mem.put(message)
|
set
Set chat history.
Source code in llama-index-core/llama_index/core/memory/simple_composable_memory.py
134
135
136
137
138
139
140
141 | def set(self, messages: List[ChatMessage]) -> None:
"""Set chat history."""
self.primary_memory.set(messages)
for mem in self.secondary_memory_sources:
# finalize task often sets, but secondary memory is meant for
# long-term memory rather than main chat memory buffer
# so use put_messages instead
mem.put_messages(messages)
|
reset
Reset chat history.
Source code in llama-index-core/llama_index/core/memory/simple_composable_memory.py
| def reset(self) -> None:
"""Reset chat history."""
self.primary_memory.reset()
for mem in self.secondary_memory_sources:
mem.reset()
|