Update token_handler.py #698

DedyKredo · 2024-02-22T22:18:15Z

Type

enhancement, bug_fix

Description

Introduced error handling in _get_system_user_tokens to return -1 when an exception occurs, enhancing robustness.
Adjusted formatting in count_tokens method without altering functionality.

Changes walkthrough

Relevant files

Error handling

token_handler.py `Enhance Error Handling in Token Calculation` pr_agent/algo/token_handler.py Wrapped token calculation in `_get_system_user_tokens` with a try-except block. Returns `-1` if an exception occurs during token calculation. No changes made to the `count_tokens` method, only formatting adjusted.	+10/-7

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codiumai-pr-agent-pro · 2024-02-22T22:18:32Z

PR Description updated to latest commit (a461c2a)

Copy walkthrough table to "Files Changed" Tab

codiumai-pr-agent-pro · 2024-02-22T22:18:42Z

PR Review

PR feedback
⏱️ Estimated effort to review [1-5]	2, because the changes are straightforward and localized to a specific functionality within the token_handler.py file. The modifications include error handling and minor formatting adjustments, which are not complex to understand.
🧪 Relevant tests	No
🔍 Possible issues	The exception handling in `_get_system_user_tokens` uses a bare except, which can catch unexpected exceptions and make debugging harder. It's recommended to catch specific exceptions. Returning `-1` on error may not be the best approach if the calling code expects a non-negative integer count of tokens. It could lead to further errors if not handled properly.
🔒 Security concerns	No

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codiumai-pr-agent-pro · 2024-02-22T22:18:44Z

PR Code Suggestions

Suggestions

best practice

Specify the exception type in the try-except block. It's recommended to specify the exception type you are catching with the `try-except` block to avoid catching unexpected exceptions, which can make debugging harder. For instance, if you are expecting a template rendering error, you could catch `TemplateSyntaxError`. pr_agent/algo/token_handler.py [52-60] try: environment = Environment(undefined=StrictUndefined) system_prompt = environment.from_string(system).render(vars) user_prompt = environment.from_string(user).render(vars) system_prompt_tokens = len(encoder.encode(system_prompt)) user_prompt_tokens = len(encoder.encode(user_prompt)) return system_prompt_tokens + user_prompt_tokens -except: +except TemplateSyntaxError: return -1
Add exception handling to the `count_tokens` method for robustness. For the `count_tokens` method, it's a good practice to handle potential exceptions that might arise from the `encode` method, similar to the handling in `_get_system_user_tokens`. This ensures that the application can gracefully handle errors and provide more robust error handling. pr_agent/algo/token_handler.py [72] -return len(self.encoder.encode(patch, disallowed_special=())) +try: + return len(self.encoder.encode(patch, disallowed_special=())) +except Exception as e: + logging.error(f"Failed to encode patch: {e}") + return -1

enhancement

Log exception details for better debugging.

Consider logging the exception details when an error occurs during the token calculation.
This can help with debugging and understanding why a specific input leads to an exception.
You can use the logging module to log the exception information.

pr_agent/algo/token_handler.py [52-60]

+import logging
 try:
     environment = Environment(undefined=StrictUndefined)
     system_prompt = environment.from_string(system).render(vars)
     user_prompt = environment.from_string(user).render(vars)
     system_prompt_tokens = len(encoder.encode(system_prompt))
     user_prompt_tokens = len(encoder.encode(user_prompt))
     return system_prompt_tokens + user_prompt_tokens
-except:
+except Exception as e:
+    logging.error(f"Failed to calculate tokens: {e}")
     return -1

maintainability

Explicitly specify the `disallowed_special` parameter for clarity. To ensure the `encode` method's behavior is clear and maintainable, explicitly specify the `disallowed_special` parameter when encoding system and user prompts, even if it's an empty tuple. This makes it explicit that no special tokens are disallowed, improving code readability and maintainability. pr_agent/algo/token_handler.py [56-57] -system_prompt_tokens = len(encoder.encode(system_prompt)) -user_prompt_tokens = len(encoder.encode(user_prompt)) +system_prompt_tokens = len(encoder.encode(system_prompt, disallowed_special=())) +user_prompt_tokens = len(encoder.encode(user_prompt, disallowed_special=()))
Create a helper function to reduce code duplication in encoding logic. Since the `encoder.encode` method is used multiple times with similar parameters, consider creating a helper function to encapsulate the encoding logic. This will reduce code duplication and make the code cleaner and easier to maintain. pr_agent/algo/token_handler.py [56-57] -system_prompt_tokens = len(encoder.encode(system_prompt)) -user_prompt_tokens = len(encoder.encode(user_prompt)) +def encode_prompt(prompt): + return len(encoder.encode(prompt, disallowed_special=())) +system_prompt_tokens = encode_prompt(system_prompt) +user_prompt_tokens = encode_prompt(user_prompt) +

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DedyKredo · 2024-02-22T22:19:13Z

/help

codiumai-pr-agent-pro · 2024-02-22T22:19:19Z

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codiumai-pr-agent-pro · 2024-02-22T22:19:41Z

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file

Changed components

token_handler.py

Test Docs Improve	_get_system_user_tokens ^{(method of TokenHandler)}	+9/-6

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codiumai-pr-agent-pro · 2024-02-22T22:19:44Z

PR Documentation

Here is a list of the files that were modified in the PR, with docstring for each altered code component:

token_handler.py

_get_system_user_tokens (method) ^[+9/-6]

Component signature:

def _get_system_user_tokens(self, pr, encoder, vars: dict, system, user):

Docstring:

"""
Calculates the number of tokens in the system and user strings.

Args:
- pr: The pull request object.
- encoder: An object of the encoding_for_model class from the tiktoken module.
- vars: A dictionary of variables.
- system: The system string.
- user: The user string.

Returns:
The sum of the number of tokens in the system and user strings.
"""

codiumai-pr-agent-pro · 2024-02-22T22:19:47Z

Changelog updates:

2024-02-22

Enhanced

Improved error handling in token calculation by returning -1 when an exception occurs, enhancing robustness.
Adjusted formatting in count_tokens method without altering functionality.

to commit the new content to the CHANGELOG.md file, please type:
'/update_changelog --pr_update_changelog.push_changelog_changes=true'

codiumai-pr-agent-pro · 2024-02-22T22:20:14Z

Generated tests for '_get_system_user_tokens'

_get_system_user_tokens

^[+9/-6]

Component signature:

def _get_system_user_tokens(self, pr, encoder, vars: dict, system, user):

Tests for code changes in _get_system_user_tokens method:

[happy path]

_get_system_user_tokens should correctly calculate and return the sum of tokens in system and user strings under normal conditions

test_code:

import pytest
from pr_agent.algo.token_handler import TokenHandler
from tiktoken.mocks import MockEncoder

def test_get_system_user_tokens_happy_path():
    # Given
    token_handler = TokenHandler()
    mock_encoder = MockEncoder({"system": 5, "user": 3})  # Mock encoder to return specific token counts
    vars = {"name": "PR Tester"}
    system = "Hello, {{ name }}!"
    user = "Welcome, {{ name }}."

    # When
    result = token_handler._get_system_user_tokens(None, mock_encoder, vars, system, user)

    # Then
    assert result == 8, "Expected the sum of system and user tokens to be 8"

[happy path]

_get_system_user_tokens should handle empty strings for system and user without errors

test_code:

import pytest
from pr_agent.algo.token_handler import TokenHandler
from tiktoken.mocks import MockEncoder

def test_get_system_user_tokens_with_empty_strings():
    # Given
    token_handler = TokenHandler()
    mock_encoder = MockEncoder({"": 0})  # Mock encoder to return 0 tokens for empty string
    vars = {}

    # When
    result = token_handler._get_system_user_tokens(None, mock_encoder, vars, "", "")

    # Then
    assert result == 0, "Expected the sum of tokens for empty system and user strings to be 0"

[edge case]

_get_system_user_tokens should return -1 when an exception occurs during token calculation

test_code:

import pytest
from pr_agent.algo.token_handler import TokenHandler
from tiktoken.mocks import MockEncoder

def test_get_system_user_tokens_with_exception():
    # Given
    token_handler = TokenHandler()
    mock_encoder = MockEncoder(exception=RuntimeError("Encoding failed"))  # Mock encoder to raise an exception
    vars = {"name": "PR Tester"}
    system = "Hello, {{ name }}!"
    user = "Welcome, {{ name }}."

    # When
    result = token_handler._get_system_user_tokens(None, mock_encoder, vars, system, user)

    # Then
    assert result == -1, "Expected the method to return -1 on exception"

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Update token_handler.py

a461c2a

codiumai-pr-agent-pro bot added enhancement New feature or request bug_fix labels Feb 22, 2024

codiumai-pr-agent-pro bot added the Review effort [1-5]: 2 label Feb 22, 2024

DedyKredo closed this Feb 22, 2024

mrT23 deleted the DedyKredo-patch-1 branch May 18, 2024 09:28

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Update token_handler.py #698

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token_handler.py

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Update token_handler.py #698

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token_handler.py

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2024-02-22

Enhanced

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Generated tests for '_get_system_user_tokens'

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