Update token_handler.py #774

DedyKredo · 2024-03-11T14:19:19Z

Type

bug_fix, enhancement

Description

Introduced error handling in _get_system_user_tokens to return -1 when an exception occurs, enhancing the robustness of token calculations.
Minor formatting fix in count_tokens method without altering its functionality.

Changes walkthrough

Relevant files

Enhancement

token_handler.py `Enhance Token Calculation Robustness and Error Handling` 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 change in the `count_tokens` method functionality, just formatting adjustment.	+10/-7

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codiumai-pr-agent-pro · 2024-03-11T14:19:40Z

PR Description updated to latest commit (a461c2a)

Copy walkthrough table to "Files Changed" Tab

codiumai-pr-agent-pro · 2024-03-11T14:19:53Z

PR Review

⏱️ Estimated effort to review [1-5]	2, because the changes are straightforward and localized to a single file with clear intentions. The modifications include adding a try-except block and a minor formatting adjustment, which are easy to understand and review.
🏅 Score	85
🧪 Relevant tests	No
🎫 Relevant ticket	No
🔍 Possible issues	Error Handling: Returning `-1` in case of an exception might not be the best approach for all use cases. It could be beneficial to either log the specific error or throw a custom exception that calling functions can handle more gracefully.
🔍 Possible issues	Exception Type: The catch-all `except:` statement might suppress unexpected errors, making debugging more difficult. It's generally a good practice to catch specific exceptions.
🔒 Security concerns	No

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codiumai-pr-agent-pro · 2024-03-11T14:19:55Z

PR Code Suggestions

Category	Suggestions
Best practice	Replace the bare `except:` with `except Exception:` to avoid catching system-exiting exceptions. The bare `except:` clause will catch all exceptions, including system-exiting exceptions and those that you might not want to catch. This can make debugging harder and might hide underlying bugs. It's better to catch specific exceptions. If you're unsure which specific exceptions might be raised by the code in the `try` block, you can start by catching `Exception`, which will not catch system-exiting exceptions. 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 Exception as e: + # Consider logging the exception here return -1
Best practice	Replace returning a magic number with raising a custom exception for error handling. Returning a magic number (-1) to indicate an error is not a best practice in Python, as it can be confusing and might lead to bugs if not properly handled by the calling code. It's better to raise a custom exception that clearly indicates what went wrong. This approach makes the code more readable and easier to debug. pr_agent/algo/token_handler.py [59-60] -except: - return -1 +except Exception as e: + raise ValueError("Failed to calculate token counts due to an error: " + str(e))
Performance	Store the results of `encoder.encode` calls in variables to improve performance. The `encoder.encode` method is called twice with the same parameters (`system_prompt` and `user_prompt`). To improve performance, especially if encoding is resource-intensive, consider storing the results of these calls in variables and reusing them. 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_encoded = encoder.encode(system_prompt) +user_encoded = encoder.encode(user_prompt) +system_prompt_tokens = len(system_encoded) +user_prompt_tokens = len(user_encoded)
Enhancement	Omit redundant arguments for cleaner code. The `disallowed_special=()` argument in the `encoder.encode` method call is redundant if you're not specifying any disallowed special tokens. If this is the default behavior, you can omit this argument for cleaner code. pr_agent/algo/token_handler.py [72] -return len(self.encoder.encode(patch, disallowed_special=())) +return len(self.encoder.encode(patch))

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DedyKredo · 2024-03-11T14:22:08Z

/help

codiumai-pr-agent-pro · 2024-03-11T14:22:15Z

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codiumai-pr-agent-pro · 2024-03-11T14:23:18Z

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 · 2024-03-11T14:23:21Z

PR Analysis

This screen contains a list of code components that were changed in this PR.
You can initiate specific actions for each component, by checking the relevant boxes.
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Results will appear as a comment on the PR, typically after 30-60 seconds.

file

Changed components

token_handler.py

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

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codiumai-pr-agent-pro · 2024-03-11T14:23:21Z

Changelog updates:

markdown

2024-03-11

Enhanced

Introduced error handling in _get_system_user_tokens to return -1 when an exception occurs, enhancing the robustness of token calculations.
Minor formatting fix in count_tokens method without altering its 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 · 2024-03-11T14:25:26Z

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 the total number of tokens for valid system and user strings

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 a TokenHandler with a mock encoder and valid system and user strings
    encoder = MockEncoder({"system": 5, "user": 3})
    token_handler = TokenHandler()
    vars = {"name": "PR Tester"}
    system = "Hello, {{ name }}!"
    user = "Welcome, {{ name }}!"

    # When _get_system_user_tokens is called
    total_tokens = token_handler._get_system_user_tokens(None, encoder, vars, system, user)

    # Then the total number of tokens should be correctly calculated
    assert total_tokens == 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 a TokenHandler with a mock encoder and empty strings for system and user
    encoder = MockEncoder({"": 0})
    token_handler = TokenHandler()
    vars = {}

    # When _get_system_user_tokens is called with empty strings
    total_tokens = token_handler._get_system_user_tokens(None, encoder, vars, "", "")

    # Then the total number of tokens should be 0
    assert total_tokens == 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 a TokenHandler with a mock encoder that raises an exception and invalid system and user strings
    encoder = MockEncoder({}, should_raise=True)
    token_handler = TokenHandler()
    vars = {"name": "PR Tester"}
    system = "Hello, {{ non_existent_var }}!"
    user = "Welcome, {{ another_non_existent_var }}!"

    # When _get_system_user_tokens is called
    total_tokens = token_handler._get_system_user_tokens(None, encoder, vars, system, user)

    # Then the method should return -1
    assert total_tokens == -1

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Update token_handler.py

a461c2a

codiumai-pr-agent-pro bot added enhancement New feature or request bug_fix labels Mar 11, 2024

codiumai-pr-agent-pro bot added Review effort [1-5]: 2 Missing SOC2 PR ticket labels Mar 11, 2024

DedyKredo closed this Mar 11, 2024

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

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Update token_handler.py #774

Update token_handler.py #774

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Update token_handler.py #774

Update token_handler.py #774

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token_handler.py

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2024-03-11

Enhanced

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Generated tests for '_get_system_user_tokens'

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