Getting a file’s size is a common task in Python. There are several ways to do it, depending on what you need and how much detail you want about the file. Using os.path.getsize() The simplest approach is os.path.getsize(): import os file_path = ‘/path/to/your/file.txt’ size_bytes = os.path.getsize(file_path) print(f”File size: {size_bytes} bytes”) This returns the size in…
When you need to traverse a directory tree in Python, you have several options. The choice depends on whether you want recursive traversal, how you want to handle the results, and your Python version. Using os.walk() The os.walk() function is the classic approach for recursively iterating through directories. It yields tuples of (dirpath, dirnames, filenames)…
The most reliable way to get a file extension in Python is os.path.splitext(), which splits a filename into the base name and extension. For modern code, pathlib.Path provides a cleaner alternative. Using os.path.splitext() os.path.splitext() returns a tuple of (name, extension): import os name, ext = os.path.splitext(‘file.txt’) print(name) # ‘file’ print(ext) # ‘.txt’ This works with…
Finding reliable, free image hosting is essential for developers, bloggers, and content creators. Your choice depends on your use case — whether you need temporary sharing, permanent hosting with transformations, or stock imagery. Imgur Imgur remains the straightforward choice for quick image sharing and temporary hosting. You can upload without an account, get an instant…
When sending POST requests through a Squid proxy with curl, you may encounter a proxy error that blocks the request, even though the same request works fine with GET. The issue typically appears as: ERROR The requested URL could not be retrieved The root cause is the Expect: 100-continue header that curl automatically adds to…
YouCompleteMe’s installation script fails on Fedora with a CMake error about missing PYTHON_LIBRARIES and PYTHON_INCLUDE_DIRS, even when Python is already installed. The error looks like this: CMake Error at /usr/share/cmake/Modules/FindPythonLibs.cmake:201 Could NOT find PythonLibs (missing: PYTHON_LIBRARIES PYTHON_INCLUDE_DIRS) The issue is that you have the Python runtime libraries installed but not the development headers needed for…
Google+ shut down in 2019, so the original premise of this post no longer applies. However, the broader problem—automatically sharing blog RSS feeds across social platforms—remains relevant. Here’s how to handle RSS-to-social distribution in 2026. Modern RSS Distribution Tools For most technical blogs, you have several solid options: Zapier remains one of the most reliable…
Connecting your application to a MySQL database is fundamental to most backend systems. Rather than shelling out to the mysql command-line client, you’ll use language-specific connectors that provide proper connection pooling, error handling, and prepared statements. Language-Specific MySQL Drivers The best approach depends on your tech stack: Python Use mysql-connector-python for straightforward connections or PyMySQL…
The core problem here is legitimate: if you’re running multiple jobs on the same dataset where the mapper phase produces identical intermediate results, recomputing those results is wasteful. However, skipping the mapper phase entirely breaks MapReduce’s processing model. There are better approaches. Why You Can’t Just Skip the Mapper MapReduce assumes data flows through map…
Spark SQL doesn’t have a separate DDL/DML specification distinct from Hive QL — it inherits its SQL dialect directly from Hive. If you’re designing a SQL engine or looking to understand Spark SQL’s data definition and manipulation capabilities, you need to reference Hive’s DDL and DML documentation. Why Spark SQL Uses Hive QL Spark SQL…
Vim determines file types by extension to apply syntax highlighting and indentation. If you have custom file extensions that should be treated as C files, you need to configure Vim to recognize them. Using autocommand in .vimrc Add an autocommand to your ~/.vimrc: ” Treat .h and .c files in a custom directory as C…
Distribution repositories often lag behind Calibre’s latest releases. If your package manager shows an older version and you need current features or bug fixes, installing directly from the official installer is straightforward. Official installer method Calibre provides a dedicated Linux installer that works across distributions. This is the recommended approach for staying current: sudo -v…
The .mbox format stores email messages as plain text in a single file, with each message separated by a “From ” line. If you have archived emails or need to work with mailbox exports, here are the practical ways to read and manipulate them on Linux. Using Thunderbird Thunderbird remains a solid option for viewing…
UDP packet loss on Linux commonly stems from undersized kernel buffers. When packets arrive faster than the application can process them, the kernel drops excess datagrams silently. Unlike TCP, UDP offers no retransmission, so these losses are permanent. Proper buffer tuning is essential for DNS servers, NTP, monitoring systems, video streaming, and any high-throughput UDP…
awk is the most efficient approach for this task. It processes the file in a single pass and doesn’t load data into memory: awk ‘{ total += $5; count++ } END { print total/count }’ file.txt This assumes your numeric value is the 5th whitespace-delimited field. For a file like: Run 0: Time used: 22.235331711…
The most straightforward approach is whitespace-mode, which provides built-in visual feedback for lines exceeding a specified column width. Add this to your Emacs configuration: (require ‘whitespace) (setq whitespace-style ‘(face empty tabs lines-tail trailing)) (setq whitespace-line-column 80) (global-whitespace-mode t) The lines-tail style highlights only the portion of the line exceeding whitespace-line-column, which is less visually intrusive…
The simplest approach is to select text and run untabify: M-x untabify This replaces all tabs in the selected region with spaces, preserving column alignment. If no region is active, Emacs prompts you to define one. Convert the Entire Buffer Select all content, then run untabify: C-x h M-x untabify C-x h selects the whole…
The built-in etags command doesn’t recursively traverse directories by default, but generating TAGS files across your entire project is straightforward with the right tools and setup. Using ctags (Recommended) The simplest approach is ctags with the -e flag, which generates Emacs-compatible TAGS files: ctags -e -R . The -R flag enables recursive traversal. This works…
Amazon S3 has a maximum object size of 5TB per object. This limit applies uniformly across all storage classes and regions — there are no exceptions or workarounds. Understanding the 5TB Ceiling The 5TB limit is a hard constraint at the API level. You cannot upload, copy, or restore an object larger than this. While…
The nl command is purpose-built for adding line numbers to text files: nl text-file By default, nl numbers all non-empty lines and skips blank lines. This behavior is controlled by the body section style, which defaults to t (text only). Common nl options Number all lines including blanks: nl -ba text-file Start numbering at a…