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sdk-python/src/strands/types/exceptions.py at main · polytech-dev/sdk-python · GitHub
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sdk-python
/
src
/
strands
/
types
/
exceptions.py
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types
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exceptions.py
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"""Exception-related type definitions for the SDK."""
from
typing
import
Any
class
EventLoopException
(
Exception
):
"""Exception raised by the event loop."""
def
__init__
(
self
,
original_exception
:
Exception
,
request_state
:
Any
=
None
)
->
None
:
"""Initialize exception.
Args:
original_exception: The original exception that was raised.
request_state: The state of the request at the time of the exception.
"""
self
.
original_exception
=
original_exception
self
.
request_state
=
request_state
if
request_state
is
not
None
else
{}
super
().
__init__
(
str
(
original_exception
))
class
MaxTokensReachedException
(
Exception
):
"""Exception raised when the model reaches its maximum token generation limit.
This exception is raised when the model stops generating tokens because it has reached the maximum number of
tokens allowed for output generation. This can occur when the model's max_tokens parameter is set too low for
the complexity of the response, or when the model naturally reaches its configured output limit during generation.
"""
def
__init__
(
self
,
message
:
str
):
"""Initialize the exception with an error message and the incomplete message object.
Args:
message: The error message describing the token limit issue
"""
super
().
__init__
(
message
)
class
ContextWindowOverflowException
(
Exception
):
"""Exception raised when the context window is exceeded.
This exception is raised when the input to a model exceeds the maximum context window size that the model can
handle. This typically occurs when the combined length of the conversation history, system prompt, and current
message is too large for the model to process.
"""
pass
class
MCPClientInitializationError
(
Exception
):
"""Raised when the MCP server fails to initialize properly."""
pass
class
ModelThrottledException
(
Exception
):
"""Exception raised when the model is throttled.
This exception is raised when the model is throttled by the service. This typically occurs when the service is
throttling the requests from the client.
"""
def
__init__
(
self
,
message
:
str
)
->
None
:
"""Initialize exception.
Args:
message: The message from the service that describes the throttling.
"""
self
.
message
=
message
super
().
__init__
(
message
)
pass
class
SessionException
(
Exception
):
"""Exception raised when session operations fail."""
pass
class
ToolProviderException
(
Exception
):
"""Exception raised when a tool provider fails to load or cleanup tools."""
pass
class
StructuredOutputException
(
Exception
):
"""Exception raised when structured output validation fails after maximum retry attempts."""
def
__init__
(
self
,
message
:
str
):
"""Initialize the exception with details about the failure.
Args:
message: The error message describing the structured output failure
"""
self
.
message
=
message
super
().
__init__
(
message
)
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