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دکوراتور‌ها در Python و Django\n\n**Decorator** در Python یک **function** است که یک **function** دیگر را به عنوان ورودی می‌گیرد و نسخه‌ای جدید از آن را با قابلیت‌های اضافه برمی‌گرداند، بدون اینکه کد اصلی تغییر کند.\nاز **decorator** معمولاً برای کارهایی مثل **logging**، **validation**، **caching** و **access control** استفاده می‌شود.\n\n### مثال ساده در Python\n\n```python\n\ndef my_decorator(func):\n    def warpper():\n        print(\"-- start\")\n        func()\n        print(\"-- finish\")\n    return warpper\n\n\n@my_decorator\ndef test():\n    print(\"this is a test\")\n\ntest()\n\n```\n\n---\n\n### دکوراتور در Django\n\nDjango تعداد زیادی **decorator** آماده دارد که کارهای رایج توسعه وب را ساده می‌کنند:\n\n* **`@login_required`** → محدود کردن دسترسی یک **view** به کاربران لاگین کرده.\n* **`@permission_required('app.permission')`** → بررسی داشتن **permission** خاص برای کاربر.\n* **`@csrf_exempt`** → معاف کردن یک **view** از بررسی CSRF.\n* **`@cache_page(timeout)`** → **cache** کردن خروجی یک **view** برای مدت مشخص.\n\nمثال:\n\n```python\nfrom django.contrib.auth.decorators import login_required\n\n@login_required\ndef dashboard(request):\n    return HttpResponse(\"wellcode to dashboard\")\n```\n\n---\n\n**خلاصه:**\nدر Python، **decorator** روشی انعطاف‌پذیر برای افزودن یا تغییر رفتار **function** و **method** است.\nدر Django، از آن برای **authentication**، **authorization**، **security** و **performance optimization** استفاده می‌شود.\n\n-","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fnotesparvvaresh%2Fdecorator_python","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fnotesparvvaresh%2Fdecorator_python","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fnotesparvvaresh%2Fdecorator_python/lists"}