چالش پایتون | United States America (US)

Create: 2025-01-11 Update: 2025-07-14 07:21:54

#متن_کاوی_با_پایتون

✅ عملیات روی فایل

🔹 اولین دستور همون تابع open است که در تایپک قبلی مثالش رو زدیم و برای باز کردن فایل ازش استفاده میکنیم .

f = open(filename,mode)

🔹توابعی که برای خواندن خط به خط فایل،یا کل فایل،یا اینکه تعداد کارکتری خاصی از فایل رو بخونیم.این توابع بصورت زیر هستند

f.readline()
f.read()
f.read(n)

🔹برای مشخص کردن موقعیت فایل از تابع seek استفاده میکنیم

f.seek(n)

🔹برای نوشتن در یک فایل از تابع write استفاده خواهیم کرد.

f.write(message)

🔹و برای بستن فایل هم از تابع close استفاده خواهیم کرد.دقت کنید بعد از پایان کار با فایل، باید با این دستور فایل باز شده رو ببندید.

f.close()

🔹و اگر میخواهید چک کنید که فایلتون بسته شده یا خیر میتونید از تابع closed برای اینکار استفاده کنید .و در پاسخ true یا false خواهد داد.

f.closed

🔻 حذف n/ از انتهای خطوط

🔹همانطور که در مثال دیده بودید وقتی یک فایل رو میخونیم یک n/ در انتهای خط به معنای پایان خط نمایش داده می شود برای اینکه بتونیم حذفش کنیم کافیه دستور rstrip که قبلا هم در موردش توضیح دادیم و گفتیم از انتها یک کارکتر رو حذف خواهد کرد استفاده میکنیم.مثال زیر رو ببنید

>>> f = open('D:\Text mining\week-1\Lesson-2\humans.txt','r',encoding='utf-8-sig')

>>> text11 = f.readline()
>>> text11
'Python is an interpreted high-levelprogramming\n'

>>> text11.rstrip()
'Python is an interpreted high-levelprogramming'

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چالش پایتون

f = open(filename,mode)

f.readline()
f.read()
f.read(n)

🔹برای مشخص کردن موقعیت فایل از تابع seek استفاده میکنیم

f.seek(n)

🔹برای نوشتن در یک فایل از تابع write استفاده خواهیم کرد.

f.write(message)

f.close()

f.closed

>>> f = open('D:\Text mining\week-1\Lesson-2\humans.txt','r',encoding='utf-8-sig')

>>> text11 = f.readline()
>>> text11
'Python is an interpreted high-levelprogramming\n'

>>> text11.rstrip()
'Python is an interpreted high-levelprogramming'

🎯 این آموزش رو بفرستید برای علاقه مندان متن کاوی

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

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