Questions
Find answers to frequently asked development questions. For information about Better Stack products, explore our docs.
How To Color Python Logging Output?
If you are new to logging in Python, please feel free to start with our Introduction to Python logging to get started smoothly. Otherwise, here is how to color python logging output: 🔠Want to cent...
How to Test a Single File Under Pytest
To run a single test file with pytest, use the command pytest followed by the file path: pytest tests/test_file.py To execute a specific test within that file, append :: and the test name to the fi...
How to Assert if an Exception Is Raised With Pytest?
Pytest can be used to test whether a function raises an exception. For instance, consider a division function that raises a ZeroDivisionError if there is an attempt to divide by zero: def divide(x,...
How to Use Pytest With Virtualenv?
To effectively use Pytest within a Python virtual environment, follow these instructions: First, create a virtual environment using Python. Assuming you are using the current latest version, (Pytho...
How to Skip Directories With Pytest?
You can instruct Pytest to exclude specific directories from testing with the --ignore option. To exclude a single directory, execute: pytest --ignore=somedirectory To exclude multiple directories ...
How to Solve the ModuleNotFoundError With Pytest?
To fix the ModuleNotFoundError in pytest, you can start by making your tests directory a Python package.This can be achieved by including an empty __init__.py file to the directory: └── tests/ ...
How to Profile and Identify Slow Tests?
You can easily profile the duration of tests using pytest to identify slow tests using the --durations=N option. To display the execution time of every test function, set --durations to 0: pytest -...
How to Disable a Test Using Pytest?
If you need to disable a specific test when running your test suite with pytest, use the pytest skip decorator. Suppose you have the following tests in your test suite: import pytest def test_addit...
How to Debug Pytest With pdb Breakpoints?
To debug a pytest test using pdb, you can manually insert a breakpoint by adding import pdb; pdb.set_trace() in your test: import pytest def divide(x, y): return x / y def testzerodivision(): ...
How to Add the File Name as a Field in Logstash?
If you're dealing with log entries from multiple files and want to dynamically add the file path to each log event to identify its source, you can achieve this using Logstash. Here's how: You can u...
How to Escape Tab Separators in Logstash?
To correctly process CSV data that uses tab characters as separators in Logstash, it's necessary to configure the Logstash CSV filter to recognize the tab separators. Suppose you're reading CSV da...
How to Debug the Logstash File Plugin
To debug the Logstash file plugin or Logstash configuration, follow these steps. First, ensure your configuration file has no errors using the following command: bin/logstash --config.testandexit -...
Can You Delete the Message Field From Logstash?
Yes, you can remove the message field and other fields if you find them redundant or unnecessary. This will not cause any issues. To delete the message field, you can use the following configuratio...
How to Handle Multiple Heterogeneous Inputs With Logstash?
Here's how you can manage multiple heterogeneous inputs with Logstash, enabling the Logstash pipeline to process and route logs from various sources to different destinations. Logstash's configurat...
How to Safely Stop Logstash?
To stop a Logstash instance safely without causing issues, follow these instructions. If you're on a systemd-based system, you can stop Logstash using the following command: systemctl stop logstash...
How to Auto-Reload Logstash Configuration
To enable Logstash to detect and reload the configuration file automatically, you can use the --config.reload.automatic option when starting Logstash. Here's how to activate it. When launching Log...
How to Use All the Cores on Multi-Core Machines in node.js
Node.js is designed to be single-threaded, but you can take advantage of multi-core machines by utilizing the cluster module or by creating separate Node.js processes manually. Using the cluster Mo...
How to Run Typescript Files from Command Line in node.js?
To run TypeScript files from the command line in Node.js, you need to transpile the TypeScript code to JavaScript first, and then execute the generated JavaScript file using Node.js. Here are the s...
Node Version Manager Install - Nvm Command Not Found
If you have installed Node Version Manager (NVM) but are encountering the issue where the nvm command is not found, it could be due to a few reasons. Here are some steps to troubleshoot and resolve...
How to Store node.js Deployment Settings/Configuration Files?
Storing deployment settings or configuration files for a Node.js application can be approached in several ways. The choice depends on your specific needs, the environment, and the level of security...
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