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Slices help

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Slices help

inc0mplete	4 Aug, 2008 - 06:55 PM Post #1
New D.I.C Head Joined: 10 May, 2008 Posts: 22	Hello, I'm reading the documentation for python on the Python website. I don't really understand slices. I understand what they do...but not the second index. for example CODE x = "helloA" print x[0:2] print x[2:4] These are just examples I made up. I understand the first index 0 and 2 will be "h" and "l" because the indexing starts at 0. But what is the second index for? In the examples given, it's not starting from 0...eg. 0:2 does not produce "hl" l would be the 3rd element or x[2]. Someone please help me understand the count. Thank you in advance.
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linuxunil	RE: Slices Help 4 Aug, 2008 - 07:01 PM Post #2
New D.I.C Head Joined: 7 Mar, 2006 Posts: 46 Thanked: 2 times Dream Kudos: 125 My Contributions	The second index is exclusive. In other words the index of the second one is not included in the slice. So x[2:4] is selecting the second and third indexes but not the fourth. This post has been edited by linuxunil: 4 Aug, 2008 - 07:52 PM
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inc0mplete	RE: Slices Help 4 Aug, 2008 - 07:13 PM Post #3
New D.I.C Head Joined: 10 May, 2008 Posts: 22	THANK YOU! but another fast question; what happens if it is x[1:1]? in the example i saw, lets say the same one i used above. if i did x[1:1] i would get "el". buy why? it's including the 1 index, and also excluding the 1 index? And if so, why is the 2nd index being sliced? This post has been edited by inc0mplete: 4 Aug, 2008 - 07:16 PM
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Nova Dragoon	RE: Slices Help 5 Aug, 2008 - 12:08 PM Post #4
The Innocent Shall Suffer, Big Time Joined: 16 Aug, 2001 Posts: 6,129 Thanked: 7 times Dream Kudos: 515 Expert In: Python, Linux My Contributions	CODE >>> x = "helloA" >>> x[1:1] ''
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linuxunil	RE: Slices Help 7 Aug, 2008 - 06:08 AM Post #5
New D.I.C Head Joined: 7 Mar, 2006 Posts: 46 Thanked: 2 times Dream Kudos: 125 My Contributions	It's just the way they decided to implement slices, the second index is always excluded.
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