How to set a max length for a python list/set?

python list max maxlength
alvas picture alvas · Jul 8, 2013 · Viewed 39.7k times · Source

In c/c++, we could have:

maxnum = 10;
double xlist[maxnum];

How to set a maximum length for a python list/set?

Answer

Martijn Pieters picture Martijn Pieters · Jul 8, 2013

You don't and do not need to.

Python lists grow and shrink dynamically as needed to fit their contents. Sets are implemented as a hash table, and like Python dictionaries grow and shrink dynamically as needed to fit their contents.

Perhaps you were looking for collections.deque (which takes a maxlen parameter) or something using a heapq (using heapq.heappushpop() when you have reached the maximum) instead?

Related questions

Getting the index of the returned max or min item using max()/min() on a list

I'm using Python's max and min functions on lists for a minimax algorithm, and I need the index of the value returned by max() or min(). In other words, I need to know which move produced the max (at a …

Read More
How to find all positions of the maximum value in a list?

I have a list: a = [32, 37, 28, 30, 37, 25, 27, 24, 35, 55, 23, 31, 55, 21, 40, 18, 50, 35, 41, 49, 37, 19, 40, 41, 31] max element is 55 (two elements on position 9 and 12) I need to find on which position(s) the maximum value is situated. Please, help.

Read More
Check if all values in list are greater than a certain number

my_list1 = [30,34,56] my_list2 = [29,500,43] How to I check if all values in list are >= 30? my_list1 should work and my_list2 should not. The only thing I could think of doing was: boolean = 0 def func(ls): for k in …

Read More