The latest articles on DEV Community by qing (@qingluan). https://dev.to/qingluan https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3897160%2F88fcfc25-1d56-4adc-b6b7-f5b10bc9f8d8.png https://dev.to/qingluan en qing Sat, 25 Apr 2026 16:10:26 +0000 https://dev.to/qingluan/5-python-automation-scripts-every-developer-needs-in-2025-leb https://dev.to/qingluan/5-python-automation-scripts-every-developer-needs-in-2025-leb <h1> 5 Python Automation Scripts Every Developer Needs in 2025 </h1> <p>As developers, we spend too much time on repetitive tasks. Here are 5 Python scripts that will save you hours every week.</p> <h2> 1. Batch File Renamer </h2> <div class="highlight js-code-highlight"> <pre class="highlight python"><code><span class="kn">import</span> <span class="n">os</span> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">f</span> <span class="ow">in</span> <span class="nf">enumerate</span><span class="p">(</span><span class="n">os</span><span class="p">.</span><span class="nf">listdir</span><span class="p">(</span><span class="sh">'</span><span class="s">.</span><span class="sh">'</span><span class="p">)):</span> <span class="n">os</span><span class="p">.</span><span class="nf">rename</span><span class="p">(</span><span class="n">f</span><span class="p">,</span> <span class="sa">f</span><span class="sh">'</span><span class="s">file_</span><span class="si">{</span><span class="n">i</span><span class="si">:</span><span class="mi">03</span><span class="n">d</span><span class="si">}{</span><span class="n">os</span><span class="p">.</span><span class="n">path</span><span class="p">.</span><span class="nf">splitext</span><span class="p">(</span><span class="n">f</span><span class="p">)[</span><span class="mi">1</span><span class="p">]</span><span class="si">}</span><span class="sh">'</span><span class="p">)</span> </code></pre> </div> <h2> 2. Auto Email Reports </h2> <p>Use smtplib to send daily reports automatically. No more manual emails.</p> <h2> 3. Web Data Monitor </h2> <p>Use httpx + BeautifulSoup to track price changes, news updates, or any web content.</p> <h2> 4. Excel Auto-Processing </h2> <p>Pandas can read, process, and generate Excel reports with charts in seconds.</p> <h2> 5. Scheduled Task Runner </h2> <p>Use crontab or APScheduler to run scripts automatically every day.</p> <p>Each of these saves at least 30 minutes daily. Start automating today!</p> <p><em>More at <a href="https://%E9%9D%92.%E5%A4%B1%E8%90%BD.%E4%B8%96%E7%95%8C" rel="noopener noreferrer">https://青.失落.世界</a></em></p> python automation productivity tutorial qing Sat, 25 Apr 2026 11:20:02 +0000 https://dev.to/qingluan/docker-for-beginners-a-practical-guide-25i https://dev.to/qingluan/docker-for-beginners-a-practical-guide-25i <p>Docker simplified.<br> </p> <div class="highlight js-code-highlight"> <pre class="highlight shell"><code><span class="c"># Run a container</span> docker run <span class="nt">-d</span> <span class="nt">--name</span> myapp <span class="nt">-p</span> 8080:80 nginx <span class="c"># Build an image</span> docker build <span class="nt">-t</span> myapp <span class="nb">.</span> <span class="c"># Docker Compose</span> docker compose up <span class="nt">-d</span> </code></pre> </div> <p><em>More at <a href="https://%E9%9D%92.%E5%A4%B1%E8%90%BD.%E4%B8%96%E7%95%8C" rel="noopener noreferrer">https://青.失落.世界</a></em></p> docker devops tutorial beginners qing Sat, 25 Apr 2026 11:10:02 +0000 https://dev.to/qingluan/top-10-free-apis-every-developer-should-know-74o https://dev.to/qingluan/top-10-free-apis-every-developer-should-know-74o <p>Free APIs for your next project.</p> <ol> <li>OpenWeather - Weather data</li> <li>CoinGecko - Crypto prices</li> <li>NewsAPI - News articles</li> <li>GitHub API - Repository data</li> <li>HN Algolia - HackerNews search</li> <li>REST Countries - Country info</li> <li>JSONPlaceholder - Fake data</li> <li>PokeAPI - Pokemon data</li> <li>NASA API - Space data</li> <li>Dog API - Random dogs</li> </ol> <p><em>More at <a href="https://%E9%9D%92.%E5%A4%B1%E8%90%BD.%E4%B8%96%E7%95%8C" rel="noopener noreferrer">https://青.失落.世界</a></em></p> api programming free tools qing Sat, 25 Apr 2026 11:00:02 +0000 https://dev.to/qingluan/how-to-rent-out-your-gpu-and-earn-2x-more-than-mining-280k https://dev.to/qingluan/how-to-rent-out-your-gpu-and-earn-2x-more-than-mining-280k <p>GPU rental is more profitable than mining.</p> <h2> Platforms </h2> <ul> <li>Vast.ai: $50-500/month</li> <li>io.net: $50-1000/month</li> <li>Render Network: $50-500/month</li> </ul> <h2> Requirements </h2> <ul> <li>NVIDIA GPU (RTX 3060+)</li> <li>Stable internet</li> <li>Linux server</li> </ul> <p><em>More at <a href="https://%E9%9D%92.%E5%A4%B1%E8%90%BD.%E4%B8%96%E7%95%8C" rel="noopener noreferrer">https://青.失落.世界</a></em></p> gpu money ai crypto qing Sat, 25 Apr 2026 10:54:38 +0000 https://dev.to/qingluan/5-github-repos-that-will-make-you-a-better-developer-3mad https://dev.to/qingluan/5-github-repos-that-will-make-you-a-better-developer-3mad <p>These repos changed my workflow.</p> <ol> <li> <strong>freeCodeCamp</strong> - Learn to code free</li> <li> <strong>awesome-python</strong> - Curated Python resources</li> <li> <strong>public-apis</strong> - Free APIs for projects</li> <li> <strong>developer-roadmap</strong> - Learning paths</li> <li> <strong>system-design-primer</strong> - System design</li> </ol> <p><em>More at <a href="https://%E9%9D%92.%E5%A4%B1%E8%90%BD.%E4%B8%96%E7%95%8C" rel="noopener noreferrer">https://青.失落.世界</a></em></p> github programming tools productivity qing Sat, 25 Apr 2026 10:20:02 +0000 https://dev.to/qingluan/the-complete-guide-to-crypto-airdrops-in-2025-2a1p https://dev.to/qingluan/the-complete-guide-to-crypto-airdrops-in-2025-2a1p <p>Crypto airdrops can earn $100-$10000. Here's how.</p> <h2> Top Airdrops </h2> <ul> <li>LayerZero: $500-2000</li> <li>zkSync: $200-1000</li> <li>Starknet: $100-500</li> </ul> <h2> How to Qualify </h2> <ol> <li>Bridge assets</li> <li>Make transactions</li> <li>Vote on governance</li> </ol> <p><em>More at <a href="https://%E9%9D%92.%E5%A4%B1%E8%90%BD.%E4%B8%96%E7%95%8C" rel="noopener noreferrer">https://青.失落.世界</a></em></p> crypto blockchain money defi qing Sat, 25 Apr 2026 10:10:02 +0000 https://dev.to/qingluan/how-to-make-500month-with-python-automation-2f52 https://dev.to/qingluan/how-to-make-500month-with-python-automation-2f52 <p>Python automation = real income.</p> <ol> <li>Data Scraping ($50-200/project)</li> <li>Social Media Automation ($100-500/month)</li> <li>Report Generation ($100-300/project)</li> <li>API Integration ($200-500/project)</li> </ol> <p><em>More guides at <a href="https://%E9%9D%92.%E5%A4%B1%E8%90%BD.%E4%B8%96%E7%95%8C" rel="noopener noreferrer">https://青.失落.世界</a></em></p> python automation money freelance qing Sat, 25 Apr 2026 10:00:03 +0000 https://dev.to/qingluan/build-a-web-scraper-in-10-minutes-with-python-1eo6 https://dev.to/qingluan/build-a-web-scraper-in-10-minutes-with-python-1eo6 <p>Web scraping is valuable. Here's a quick tutorial.<br> </p> <div class="highlight js-code-highlight"> <pre class="highlight python"><code><span class="kn">import</span> <span class="n">httpx</span> <span class="kn">from</span> <span class="n">bs4</span> <span class="kn">import</span> <span class="n">BeautifulSoup</span> <span class="n">r</span> <span class="o">=</span> <span class="n">httpx</span><span class="p">.</span><span class="nf">get</span><span class="p">(</span><span class="sh">'</span><span class="s">https://news.ycombinator.com</span><span class="sh">'</span><span class="p">)</span> <span class="n">soup</span> <span class="o">=</span> <span class="nc">BeautifulSoup</span><span class="p">(</span><span class="n">r</span><span class="p">.</span><span class="n">text</span><span class="p">,</span> <span class="sh">'</span><span class="s">html.parser</span><span class="sh">'</span><span class="p">)</span> <span class="k">for</span> <span class="n">item</span> <span class="ow">in</span> <span class="n">soup</span><span class="p">.</span><span class="nf">select</span><span class="p">(</span><span class="sh">'</span><span class="s">.titleline a</span><span class="sh">'</span><span class="p">):</span> <span class="nf">print</span><span class="p">(</span><span class="n">item</span><span class="p">.</span><span class="n">text</span><span class="p">)</span> </code></pre> </div> <p><em>More tutorials at <a href="https://%E9%9D%92.%E5%A4%B1%E8%90%BD.%E4%B8%96%E7%95%8C" rel="noopener noreferrer">https://青.失落.世界</a></em></p> python webscraping tutorial beginners qing Sat, 25 Apr 2026 09:50:02 +0000 https://dev.to/qingluan/free-ai-tools-that-replace-500month-subscriptions-in-2025-3hpo https://dev.to/qingluan/free-ai-tools-that-replace-500month-subscriptions-in-2025-3hpo <p>Looking for free alternatives to expensive AI tools? Here are the best ones in 2025.</p> <h2> 1. Google Gemini (Free) </h2> <p>1500 requests/day free, multimodal.</p> <h2> 2. Groq (Free) </h2> <p>14400 requests/day, ultra-fast.</p> <h2> 3. Hugging Face (Free) </h2> <p>30000+ free models.</p> <h2> 4. Stable Diffusion (Free) </h2> <p>Run locally, no limits.</p> <h2> 5. Ollama (Free) </h2> <p>Run LLMs locally.</p> <p><em>More at <a href="https://%E9%9D%92.%E5%A4%B1%E8%90%BD.%E4%B8%96%E7%95%8C" rel="noopener noreferrer">https://青.失落.世界</a></em></p> ai tools productivity free qing Sat, 25 Apr 2026 09:38:39 +0000 https://dev.to/qingluan/how-i-built-an-ai-bot-that-makes-money-while-i-sleep-25ep https://dev.to/qingluan/how-i-built-an-ai-bot-that-makes-money-while-i-sleep-25ep <p>I built an automated system that generates content, monitors opportunities, and earns passive income 24/7.</p> <h2> The Stack </h2> <ul> <li>Python + FastAPI</li> <li>Gemini AI for content generation</li> <li>Docker for deployment</li> <li>Cron jobs for automation</li> </ul> <h2> What It Does </h2> <ol> <li>Scans HackerNews for money-making opportunities</li> <li>Generates articles automatically</li> <li>Monitors crypto prices for arbitrage</li> <li>Runs 10 automated tasks 24/7</li> </ol> <h2> Results After 1 Week </h2> <ul> <li>163 articles generated</li> <li>149 opportunity scans</li> <li>Multiple passive income streams running</li> </ul> <h2> Key Takeaway </h2> <p>Automation is the key to passive income. Start small, automate everything.</p> <p><em>Want to build your own? Follow me for the tutorial series!</em></p> ai python automation money qing Sat, 25 Apr 2026 09:38:36 +0000 https://dev.to/qingluan/10-python-one-liners-that-will-blow-your-mind-jih https://dev.to/qingluan/10-python-one-liners-that-will-blow-your-mind-jih <p>Python is incredibly powerful. Here are 10 one-liners that will make you more productive.</p> <h2> 1. Swap Two Variables </h2> <div class="highlight js-code-highlight"> <pre class="highlight python"><code><span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="o">=</span> <span class="n">b</span><span class="p">,</span> <span class="n">a</span> </code></pre> </div> <h2> 2. List Comprehension </h2> <div class="highlight js-code-highlight"> <pre class="highlight python"><code><span class="n">squares</span> <span class="o">=</span> <span class="p">[</span><span class="n">x</span><span class="o">**</span><span class="mi">2</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="nf">range</span><span class="p">(</span><span class="mi">10</span><span class="p">)]</span> </code></pre> </div> <h2> 3. Read a File </h2> <div class="highlight js-code-highlight"> <pre class="highlight python"><code><span class="n">content</span> <span class="o">=</span> <span class="nf">open</span><span class="p">(</span><span class="sh">'</span><span class="s">file.txt</span><span class="sh">'</span><span class="p">).</span><span class="nf">read</span><span class="p">()</span> </code></pre> </div> <h2> 4. Flatten a List </h2> <div class="highlight js-code-highlight"> <pre class="highlight python"><code><span class="n">flat</span> <span class="o">=</span> <span class="p">[</span><span class="n">item</span> <span class="k">for</span> <span class="n">sublist</span> <span class="ow">in</span> <span class="n">nested</span> <span class="k">for</span> <span class="n">item</span> <span class="ow">in</span> <span class="n">sublist</span><span class="p">]</span> </code></pre> </div> <h2> 5. Dictionary Comprehension </h2> <div class="highlight js-code-highlight"> <pre class="highlight python"><code><span class="n">d</span> <span class="o">=</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="n">v</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="nf">zip</span><span class="p">(</span><span class="n">keys</span><span class="p">,</span> <span class="n">values</span><span class="p">)}</span> </code></pre> </div> <h2> 6. Reverse a String </h2> <div class="highlight js-code-highlight"> <pre class="highlight python"><code><span class="n">reversed_str</span> <span class="o">=</span> <span class="n">s</span><span class="p">[::</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> </code></pre> </div> <h2> 7. Find Most Common Element </h2> <div class="highlight js-code-highlight"> <pre class="highlight python"><code><span class="n">most_common</span> <span class="o">=</span> <span class="nf">max</span><span class="p">(</span><span class="nf">set</span><span class="p">(</span><span class="n">lst</span><span class="p">),</span> <span class="n">key</span><span class="o">=</span><span class="n">lst</span><span class="p">.</span><span class="n">count</span><span class="p">)</span> </code></pre> </div> <h2> 8. Check if Palindrome </h2> <div class="highlight js-code-highlight"> <pre class="highlight python"><code><span class="n">is_palindrome</span> <span class="o">=</span> <span class="n">s</span> <span class="o">==</span> <span class="n">s</span><span class="p">[::</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> </code></pre> </div> <h2> 9. Merge Dictionaries </h2> <div class="highlight js-code-highlight"> <pre class="highlight python"><code><span class="n">merged</span> <span class="o">=</span> <span class="p">{</span><span class="o">**</span><span class="n">dict1</span><span class="p">,</span> <span class="o">**</span><span class="n">dict2</span><span class="p">}</span> </code></pre> </div> <h2> 10. HTTP Request </h2> <div class="highlight js-code-highlight"> <pre class="highlight python"><code><span class="n">data</span> <span class="o">=</span> <span class="nf">__import__</span><span class="p">(</span><span class="sh">'</span><span class="s">requests</span><span class="sh">'</span><span class="p">).</span><span class="nf">get</span><span class="p">(</span><span class="sh">'</span><span class="s">https://api.example.com</span><span class="sh">'</span><span class="p">).</span><span class="nf">json</span><span class="p">()</span> </code></pre> </div> <p><em>Follow me for more Python tips!</em></p> python programming tips beginners