چالش پایتون | United States America (US)

Create: 2024-12-05 Update: 2025-07-06 00:06:20

#دوره_تکمیلی_پایتون

✅لیست ها در پایتون (1)

⏪برای تعریف یک لیست یک اسم دلخواه برای لیست معرفی میکنیم و سپس داخل یک کروشه عناصرمون رو قرار میدهیم(عناصر با کاما از هم جدا میشن).ما اینجا اسم لیست رو گذاشتیم ary و عناصرمون هم اعداد صحیح هستند.

»> ary=[1,3,5,7,9,11]

⏪برای محاسبه طول یک لیست از فانکشن len استفاده میکنیم.توجه کنید در پایتون اندیس عناصرمون از صفر شروع خواهد شد.

»> len(ary)
6

⏪برای دسترسی به داده های یک لیست از طریق اندیس لیست به اون داده دسترسی پیدا میکنیم بعنوان مثال اگر بخواهیم به عدد 3 که در لیست قرار داره دسترسی داشته باشیم چون اندیس از صفر شروع میشه پس اندیس شماره یک لیست مساوی 3 خواهد بود.

»> ary[1]
3

⏪اگر بخواهیم بصورت یک رشته ای از داده ها نمایش بده به این صورت عمل میکنیم. توجه کنید ما در این مثال برای ابتدا خالی گذاشتم بعد دو نقطه و عدد سه رو نوشتیم در واقع اعلام میکنیم دادههای لیست رو از ابتدا تا قبل از اندیس سه نمایش بده.

»> ary[:3]
[1, 3, 5]

⏪و اگر بخواهیم از اندیس سه تا انتها رو نمایش بده به اینصورت عمل میکنیم.

»> ary[3: ]
[7, 9, 11]

⏪میتوانیم به صورت زیر لیست جدیدی هم معرفی کنیم.

»> ary2=ary[:4]
»> ary2
[1, 3, 5, 7]

📌 نکته : در پایتون آرایه بصورت مستقیم قایل تعریف نیستم و به عناصر بالا لیست میگن ولی با استفاده از کتابخانه numpy امکان تعریف آرایه وجود داره. بنابراین اگر در بخشی از اسم آرایه بجای لیست استفاده کردیم دلیلش اینه میخایم در کل روند تعریف آرایه رو در نام پای توضیح بدیم.

🗂 مرکز آموزش پایتون
➖➖➖➖➖➖➖➖
🆔 : @pythonchallenge

چالش پایتون

»> ary=[1,3,5,7,9,11]

⏪برای محاسبه طول یک لیست از فانکشن len استفاده میکنیم.توجه کنید در پایتون اندیس عناصرمون از صفر شروع خواهد شد.

»> len(ary)
6

»> ary[1]
3

»> ary[:3]
[1, 3, 5]

⏪و اگر بخواهیم از اندیس سه تا انتها رو نمایش بده به اینصورت عمل میکنیم.

»> ary[3: ]
[7, 9, 11]

⏪میتوانیم به صورت زیر لیست جدیدی هم معرفی کنیم.

»> ary2=ary[:4]
»> ary2
[1, 3, 5, 7]

hottg.com/pythonchallenge/1555

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