Enhance Configuration Management: Flexible and Robust CoinGecko API Configuration #20
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WalkthroughThe changes introduce a new, structured configuration module for loading and validating application settings from environment variables or a dotenv file, with explicit error handling. Accompanying unit tests are added to verify configuration loading and validation. The Changes
Sequence Diagram(s)sequenceDiagram
participant App
participant ConfigModule as src.config
participant Env as Environment/.env
App->>ConfigModule: load_config(config_file)
ConfigModule->>Env: Read environment variables (and optional .env)
ConfigModule->>ConfigModule: Apply defaults & type conversions
ConfigModule->>ConfigModule: _validate_config(config)
alt Validation fails
ConfigModule-->>App: Raise ConfigurationError
else Validation passes
ConfigModule-->>App: Return validated config dict
end
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Actionable comments posted: 2
🧹 Nitpick comments (7)
tests/test_config.py (3)
1-1: Remove unused import.The
osmodule is imported but never used in this test file.-import os import pytest from src.config import load_config, ConfigurationError🧰 Tools
🪛 Ruff (0.11.9)
1-1:
osimported but unusedRemove unused import:
os(F401)
🪛 Pylint (3.3.7)
[convention] 1-1: Missing module docstring
(C0114)
[warning] 1-1: Unused import os
(W0611)
1-3: Add module docstring for better documentation.Consider adding a module-level docstring to describe the purpose of these tests.
+""" +Unit tests for the configuration loading functionality in src.config module. + +Tests cover default configuration loading, environment variable overrides, +and validation error handling scenarios. +""" import pytest from src.config import load_config, ConfigurationError🧰 Tools
🪛 Ruff (0.11.9)
1-1:
osimported but unusedRemove unused import:
os(F401)
🪛 Pylint (3.3.7)
[convention] 1-1: Missing module docstring
(C0114)
[error] 3-3: Unable to import 'src.config'
(E0401)
[warning] 1-1: Unused import os
(W0611)
59-59: Add missing final newline.Python files should end with a newline character.
with pytest.raises(ConfigurationError, match="Max retries cannot be negative"): load_config() +🧰 Tools
🪛 Pylint (3.3.7)
[convention] 59-59: Final newline missing
(C0304)
src/config.py (4)
1-3: Add module docstring for better documentation.Consider adding a module-level docstring to describe the configuration management functionality.
+""" +Configuration management module for CoinGecko API integration. + +Provides functionality to load and validate configuration settings from +environment variables or dotenv files with comprehensive error handling. +""" import os from typing import Optional, Dict, Any from dotenv import load_dotenv🧰 Tools
🪛 Pylint (3.3.7)
[convention] 1-1: Missing module docstring
(C0114)
[error] 3-3: Unable to import 'dotenv'
(E0401)
6-8: Consider enhancing the custom exception class.The current implementation is minimal. Consider removing the unnecessary
passstatement and potentially adding more functionality.class ConfigurationError(Exception): """Custom exception for configuration loading errors.""" - pass🧰 Tools
🪛 Pylint (3.3.7)
[warning] 8-8: Unnecessary pass statement
(W0107)
45-63: Consider enhancing validation logic.The current validation is basic. Consider adding more comprehensive checks for better robustness.
def _validate_config(config: Dict[str, Any]) -> None: """ Validate the loaded configuration. Args: config (Dict[str, Any]): Configuration dictionary to validate. Raises: ConfigurationError: If configuration is invalid. """ # Basic validation rules if not config['api_base_url']: raise ConfigurationError("Invalid or missing API base URL") + + # Validate URL format + if not config['api_base_url'].startswith(('http://', 'https://')): + raise ConfigurationError("API base URL must start with http:// or https://") if config['request_timeout'] <= 0: raise ConfigurationError("Request timeout must be a positive integer") if config['max_retries'] < 0: raise ConfigurationError("Max retries cannot be negative") + + if config['rate_limit_delay'] < 0: + raise ConfigurationError("Rate limit delay cannot be negative")🧰 Tools
🪛 Pylint (3.3.7)
[convention] 63-63: Final newline missing
(C0304)
63-63: Add missing final newline.Python files should end with a newline character.
if config['max_retries'] < 0: raise ConfigurationError("Max retries cannot be negative") +🧰 Tools
🪛 Pylint (3.3.7)
[convention] 63-63: Final newline missing
(C0304)
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (3)
.gitignore(1 hunks)src/config.py(1 hunks)tests/test_config.py(1 hunks)
🧰 Additional context used
🪛 Pylint (3.3.7)
src/config.py
[convention] 63-63: Final newline missing
(C0304)
[convention] 1-1: Missing module docstring
(C0114)
[error] 3-3: Unable to import 'dotenv'
(E0401)
[warning] 8-8: Unnecessary pass statement
(W0107)
[warning] 34-34: os.getenv default type is builtins.int. Expected str or None.
(W1508)
[warning] 35-35: os.getenv default type is builtins.int. Expected str or None.
(W1508)
[warning] 36-36: os.getenv default type is builtins.int. Expected str or None.
(W1508)
tests/test_config.py
[convention] 59-59: Final newline missing
(C0304)
[convention] 1-1: Missing module docstring
(C0114)
[error] 3-3: Unable to import 'src.config'
(E0401)
[warning] 1-1: Unused import os
(W0611)
🪛 Ruff (0.11.9)
tests/test_config.py
1-1: os imported but unused
Remove unused import: os
(F401)
🔇 Additional comments (4)
tests/test_config.py (3)
6-20: LGTM! Comprehensive default configuration test.The test correctly verifies that default values are loaded when no environment variables are set. The use of
monkeypatch.delenvwithraising=Falseis appropriate for ensuring a clean test environment.
22-36: LGTM! Effective custom configuration test.The test properly validates that environment variables override default values and that type conversion works correctly for numeric parameters.
38-59: LGTM! Thorough validation error testing.All three validation test functions effectively verify that the appropriate
ConfigurationErrorexceptions are raised for invalid configurations. The error message matching using regex is well-implemented.🧰 Tools
🪛 Pylint (3.3.7)
[convention] 59-59: Final newline missing
(C0304)
.gitignore (1)
1-46: LGTM! Excellent reorganization of .gitignore.The new structure is well-organized, comprehensive, and follows Python best practices. The clear sectioning (Python, Environment, Testing, IDE, OS) makes it easy to maintain and understand. This covers all the essential patterns for a Python project including:
- Complete Python artifact coverage (bytecode, builds, distributions)
- Multiple virtual environment patterns (env/, venv/, ENV/, etc.)
- Testing and coverage outputs
- Common IDE and editor files
- OS-specific files
This is a significant improvement over ad-hoc ignore patterns and aligns well with the new configuration module being introduced.
| 'request_timeout': int(os.getenv('COINGECKO_REQUEST_TIMEOUT', 30)), | ||
| 'max_retries': int(os.getenv('COINGECKO_MAX_RETRIES', 3)), | ||
| 'rate_limit_delay': int(os.getenv('COINGECKO_RATE_LIMIT_DELAY', 1)) |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Add error handling for invalid numeric environment variables.
The current implementation will raise a ValueError if environment variables contain non-numeric values. Consider wrapping the int conversions in try-catch blocks for better error messages.
- 'request_timeout': int(os.getenv('COINGECKO_REQUEST_TIMEOUT', '30')),
- 'max_retries': int(os.getenv('COINGECKO_MAX_RETRIES', '3')),
- 'rate_limit_delay': int(os.getenv('COINGECKO_RATE_LIMIT_DELAY', '1'))
+ 'request_timeout': _parse_int_env('COINGECKO_REQUEST_TIMEOUT', '30'),
+ 'max_retries': _parse_int_env('COINGECKO_MAX_RETRIES', '3'),
+ 'rate_limit_delay': _parse_int_env('COINGECKO_RATE_LIMIT_DELAY', '1')Add this helper function before the load_config function:
def _parse_int_env(env_var: str, default: str) -> int:
"""Parse integer from environment variable with error handling."""
try:
return int(os.getenv(env_var, default))
except ValueError as e:
raise ConfigurationError(f"Invalid value for {env_var}: must be an integer") from e🧰 Tools
🪛 Pylint (3.3.7)
[warning] 34-34: os.getenv default type is builtins.int. Expected str or None.
(W1508)
[warning] 35-35: os.getenv default type is builtins.int. Expected str or None.
(W1508)
[warning] 36-36: os.getenv default type is builtins.int. Expected str or None.
(W1508)
🤖 Prompt for AI Agents
In src/config.py around lines 34 to 36, the int conversions of environment
variables can raise ValueError if the values are non-numeric. To fix this,
create a helper function that wraps the int conversion in a try-except block,
catching ValueError and raising a ConfigurationError with a clear message. Then
replace the direct int conversions with calls to this helper function to ensure
robust error handling and clearer error messages.
🛠️ Refactor suggestion
Fix type safety issues with os.getenv defaults.
The current implementation passes integer defaults to os.getenv, which expects string defaults. This could cause type-related issues.
- 'request_timeout': int(os.getenv('COINGECKO_REQUEST_TIMEOUT', 30)),
- 'max_retries': int(os.getenv('COINGECKO_MAX_RETRIES', 3)),
- 'rate_limit_delay': int(os.getenv('COINGECKO_RATE_LIMIT_DELAY', 1))
+ 'request_timeout': int(os.getenv('COINGECKO_REQUEST_TIMEOUT', '30')),
+ 'max_retries': int(os.getenv('COINGECKO_MAX_RETRIES', '3')),
+ 'rate_limit_delay': int(os.getenv('COINGECKO_RATE_LIMIT_DELAY', '1'))📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| 'request_timeout': int(os.getenv('COINGECKO_REQUEST_TIMEOUT', 30)), | |
| 'max_retries': int(os.getenv('COINGECKO_MAX_RETRIES', 3)), | |
| 'rate_limit_delay': int(os.getenv('COINGECKO_RATE_LIMIT_DELAY', 1)) | |
| 'request_timeout': int(os.getenv('COINGECKO_REQUEST_TIMEOUT', '30')), | |
| 'max_retries': int(os.getenv('COINGECKO_MAX_RETRIES', '3')), | |
| 'rate_limit_delay': int(os.getenv('COINGECKO_RATE_LIMIT_DELAY', '1')) |
🧰 Tools
🪛 Pylint (3.3.7)
[warning] 34-34: os.getenv default type is builtins.int. Expected str or None.
(W1508)
[warning] 35-35: os.getenv default type is builtins.int. Expected str or None.
(W1508)
[warning] 36-36: os.getenv default type is builtins.int. Expected str or None.
(W1508)
🤖 Prompt for AI Agents
In src/config.py around lines 34 to 36, the os.getenv calls use integer
defaults, but os.getenv expects string defaults. To fix this, change the default
values to strings (e.g., '30', '3', '1') and then convert the result to int
after retrieving the environment variable. This ensures type safety and prevents
potential errors.
1 participant
Enhance Configuration Management: Flexible and Robust CoinGecko API Configuration
Description
Summary of Work
This pull request introduces a comprehensive configuration management solution for the CoinGecko API integration, providing enhanced flexibility, robust error handling, and multiple configuration sources.
Motivation
The current configuration system lacked flexibility and had limited support for different configuration methods. This refactoring addresses those limitations by creating a more adaptable and user-friendly configuration management approach.
Key Benefits
Compatibility
Changes Made
CoinGeckoConfigclass for centralized configuration managementConfigurationErrorfor configuration-related exceptions.to_dict()method for easy serializationTests and Verification
CoinGeckoConfigPRs Merged
The following pull requests have been merged:
Signatures
Staking Key
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Public Key
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Summary by CodeRabbit
.gitignorefile to a more comprehensive and standardized Python-focused structure.