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pythonlist
John Smith
John Smith

Reputation: 1099

remove the first several elements from a list python

I have a list that is very large 1000+ and I am wanting to remove the first 319 elements from the list. I have tried 

 for i in range(0,320):
     list1.pop(i)

but this doesn't work however when I do list1.pop(0) separately it does remove an element How am i able to remove the first 319 elements

Upvotes: 0

Views: 213

Answers (2)

Tamás
Tamás

Reputation: 48071

Use slicing syntax:

del list1[0:319]

By the way, calling list1.pop repeatedly does not work because the items are reindexed after each deletion. So, when you delete the first item, the next item (that was the second one) becomes the first. If you really want to use pop in a loop, you have to call list1.pop(0) 319 times - but that's gonna be terribly inefficient.

Upvotes: 2

Martijn Pieters
Martijn Pieters

Reputation: 1124228

Use del on a slice:

del list1[:319]

This will remove elements 0 - 318 (so a total of 319 elements) in one go.

Upvotes: 2

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