Kümeler (Sets) #2 - Python Dersleri (Tutorials) by elektroyazilim

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palnet · @elektroyazilim · Aug 19 '19

$16.51

Kümeler (Sets) #2 - Python Dersleri (Tutorials)

![yeni.jpg](https://cdn.steemitimages.com/DQmVqEHkajCZyuMfc1Nn7AfRj9QwYTddNmLcySkpi48PD1S/yeni.jpg) 

Merhabalar

Python programlama derslerinin bu bölümünde kümeler konusundan devam edeceğiz.

> Bu ders önceki derste verilen bilgiler üzerine bina edilecektir. Bu sebeple öncelikle o derse bakmanız tavsiye edilir.

İngilizce ismiyle _sets_ olan kümeler, içerisinde birden fazla aynı değeri bulundurmayan veri tipleriydi. Başka veri tiplerini küme veri tipine _set()_ fonksiyonu ile dönüştürmek mümkündü.

Ancak bu dönüşümü yaparken oluşacak kümenin yine küme mantığı ile ortaya çıkacağını unutmamak gerekir. Yani bir liste içerisinde tekrarlı eleman varsa o listeden oluşacak küme de o tekrarlı elemanlara yer verilmeyecektir.

## for döngüsü ve kümeler

_for_ döngüsü de nihayetinde dizisel bir yapı olduğu için listelerde olduğu gibi _for()_ döngüsünü kullanarak küme elemanları içerisinde gezinebiliriz. 

Uygulamasını görelim :

![](https://cdn.steemitimages.com/DQmYqVmh98kBf8JvBeDwqjBevG62ykWkaBvCHK1x9igGAZR/image.png)

Örneğimizde _for()_ döngüsünü kullanarak küme elemanları içerisinde gezinip değerleri ekrana yazdırdık. Ancak fark ettiğiniz üzere küme elemanları sıralı bir şekilde gelmedi.

> Kümeler sırasız olması özelliği bakımından sözlüklere benzemektedir.

Şimdi de küme elemanlarına index değerleri üzerinden erişip erişemiyeceğimizi görelim:

![](https://cdn.steemitimages.com/DQmUqkdP22ihcVngC1UT5ZMid1fYtTTvmt7ys5HgG48qkds/image.png)

Kümelere indexlerle ulaşamayacağımıza dair bir hata aldık. Fark ettiğiniz üzere ,

> Küme elemanlarına direk bir erişim söz konusu değil.

Bu şekilde bir erişim söz konusu olmasa da küme elemanlarına bir _for()_ döngüsü üzerinden erişebiliriz. 

Ya da kümeyi listeye çevirirsek elemanlarına da index değerleri üzerinden erişebiliriz. Uygulamasını görelim :

![](https://cdn.steemitimages.com/DQmTUX82jpPoMs6F6NV75B1ELw29KdwDRutqdcQfLnYqtY5/image.png)
 
Örneğimizde _langs_ kümesini _list()_  fonksiyonunu kullanarak bir listeye çevirdik ve sonrasında index değerleri üzerinden yeni listenin elemanlarına erişim sağlayabildik.

Şimdilik bu kadar.

Umarım faydalı bir çalışma olmuştur.

Teşekkürler.

![yesilayrca.png](https://cdn.steemitimages.com/DQmYZw2bhUomeivJwQ8CiLaTzXTbJPLd1PsSGdcoEE1DfKP/yesilayrca.png)

Kaynak belirtilmeyen görseller bana aittir. The pictures without source in the post is belong to me

<hr><center><sub>Posted via <a href="https://www.marlians.com/">Marlians.com</a></sub></center>

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@brupvoter · Aug 22 '19

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@edensgarden · Aug 24 '19

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@luckyvotes · Aug 24 '19

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@minnowvotes · Aug 22 '19

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@sneaky-ninja · Aug 25 '19

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