Update token_handler.py #755

DedyKredo · 2024-03-08T18:15:10Z

Type

bug_fix, enhancement

Description

Introduced error handling in _get_system_user_tokens to return -1 when an exception occurs, enhancing robustness.
Minor formatting fix in count_tokens method.

Changes walkthrough

Relevant files

Error handling

token_handler.py `Enhance Error Handling in Token Calculation` pr_agent/algo/token_handler.py Wrapped the token calculation logic in `_get_system_user_tokens` with a try-except block. Returns `-1` if an exception occurs during token calculation. No change in the logic of `count_tokens` method, just formatting adjustment.	+10/-7

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codiumai-pr-agent-pro · 2024-03-08T18:15:35Z

PR Review

⏱️ Estimated effort to review [1-5]	2, because the changes are straightforward and localized to a single file with a clear description of the enhancements and bug fixes.
🏅 Score	85
🧪 Relevant tests	No
🔍 Possible issues	Error Handling: Returning `-1` on exception in `_get_system_user_tokens` might not be the best approach for all use cases. Consider raising a custom exception or logging the error for better debuggability.
🔍 Possible issues	Missing Newline: The absence of a newline at the end of the file is not a critical issue but is generally considered good practice to include in Python files for compatibility with POSIX standards.
🔒 Security concerns	No

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codiumai-pr-agent-pro · 2024-03-08T18:15:37Z

PR Code Suggestions

Category	Suggestions
Best practice	Specify exception types in the except block to improve error handling. It's recommended to specify the exception type in the `except` block to avoid catching unexpected exceptions, which can make debugging harder. For example, if you're expecting a `TemplateSyntaxError` or `UndefinedError` from Jinja2, you should catch those specifically. 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, UndefinedError): return -1
	Avoid returning magic numbers for error indication. Returning a magic number (-1) to indicate an error is not a best practice in Python. It's better to either raise a custom exception or return `None` and handle it accordingly. This approach improves readability and error handling in the calling code. pr_agent/algo/token_handler.py [59-60] -except: - return -1 +except (TemplateSyntaxError, UndefinedError) as e: + raise CustomError("Failed to process templates") from e
	Avoid shadowing built-in function names with variable names. The use of `vars` as a variable name can be confusing because it shadows the built-in function `vars()`. Consider renaming it to something more descriptive and less likely to cause confusion or conflicts, such as `template_vars`. pr_agent/algo/token_handler.py [54-55] -system_prompt = environment.from_string(system).render(vars) -user_prompt = environment.from_string(user).render(vars) +system_prompt = environment.from_string(system).render(template_vars) +user_prompt = environment.from_string(user).render(template_vars)
Performance	Reuse encoded strings to improve performance. The `encoder.encode` method is called twice with the same parameters (`system_prompt` and `user_prompt`). To improve performance, consider encoding these strings once and reusing the result, especially if encoding is resource-intensive. 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)
Clarity	Clarify the intention behind allowing all tokens in `encoder.encode`. The `disallowed_special` parameter in `encoder.encode` method call is set to an empty tuple, which might not be the intended behavior. If there are specific special tokens that should be disallowed, they should be explicitly listed. Otherwise, if the intention is to allow all tokens, it's clearer to omit the parameter or document this decision. pr_agent/algo/token_handler.py [72] -return len(self.encoder.encode(patch, disallowed_special=())) +return len(self.encoder.encode(patch)) # Assuming all tokens are allowed

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DedyKredo · 2024-03-08T18:17:22Z

/improve --pr_code_suggestions.summarize=false

codiumai-pr-agent-pro · 2024-03-08T18:17:50Z

pr_agent/algo/token_handler.py

+        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:
+            return -1


Suggestion: It's recommended to catch specific exceptions instead of using a bare except:. This prevents the code from silently ignoring unexpected errors, which can make debugging more difficult. Identify the specific exceptions that Environment and encoder.encode might raise, and catch those specifically. [best practice]

Suggested change

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:

return -1

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 (TemplateError, EncodeError) as e:

# Consider logging the exception here

return -1

codiumai-pr-agent-pro · 2024-03-08T18:17:50Z

pr_agent/algo/token_handler.py

@@ -66,4 +69,4 @@
        Returns:
        The number of tokens in the patch string.
        """
-        return len(self.encoder.encode(patch, disallowed_special=()))
+        return len(self.encoder.encode(patch, disallowed_special=()))


Suggestion: The use of disallowed_special=() as an argument in encoder.encode might indicate that you're allowing all special characters without any restrictions. If this is intentional, it's fine, but if there are specific special characters that should not be encoded, consider specifying them explicitly for clarity and security. [possible issue]

Suggested change

return len(self.encoder.encode(patch, disallowed_special=()))

# If there are specific special characters you want to disallow, specify them like this:

# disallowed_special=('special_char1', 'special_char2')

return len(self.encoder.encode(patch, disallowed_special=()))

DedyKredo · 2024-03-08T18:19:47Z

/help

codiumai-pr-agent-pro · 2024-03-08T18:19:54Z

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codiumai-pr-agent-pro · 2024-03-08T18:20:18Z

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 · 2024-03-08T18:20:22Z

Changelog updates:

2024-03-08

Enhanced

Introduced error handling in _get_system_user_tokens to return -1 when exceptions occur, enhancing robustness.
Minor formatting fix in count_tokens method for better code readability.

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

DedyKredo · 2024-03-08T18:33:16Z

/ask what does this PR introduce?

codiumai-pr-agent-pro · 2024-03-08T18:33:28Z

Question: what does this PR introduce?

Answer:
This Pull Request introduces two main changes to the token_handler.py file:

Error Handling: The PR wraps the token calculation logic in the _get_system_user_tokens method with a try-except block. If an exception occurs during the token calculation, the method will now return -1, enhancing the robustness of the system.
Formatting Fix: The PR also includes a minor formatting fix in the count_tokens method. The logic of the method remains unchanged.

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Update token_handler.py

a461c2a

codiumai-pr-agent-pro bot added enhancement New feature or request bug_fix Review effort [1-5]: 2 labels Mar 8, 2024

codiumai-pr-agent-pro bot reviewed Mar 8, 2024

View reviewed changes

DedyKredo closed this Mar 8, 2024

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

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