Databases
StackOverflow2013
Postsdbo
PODeep version of sys.getsizeof
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PODeep version of sys.getsizeof
    primarykey
    data
    text
    <p>I want to calculate the memory used by an object. <code>sys.getsizeof</code> is great, but is shallow (for example, called on a list, it would not include the memory taken by the list's elements).</p> <p>I'd like to write a generic "deep" version of <code>sys.getsizeof</code>. I understand there is some ambiguity in the definition of "deep"; I'm perfectly happy with the <a href="http://docs.python.org/3.4/library/copy.html" rel="noreferrer">definition followed by <code>copy.deepcopy</code></a>.</p> <p>Here's my first attempt:</p> <pre><code>def get_deep_sizeof(x, level=0, processed=None): if processed is None: # we're here only if this function is called by client code, not recursively processed = set() processed.add(id(x)) mem = sys.getsizeof(x) if isinstance(x, collections.Iterable) and not isinstance(x, str): for xx in x: if id(xx) in processed: continue mem += get_deep_sizeof(xx, level+1, processed) if isinstance(x, dict): mem += get_deep_sizeof(x[xx], level+1, processed) return mem </code></pre> <p>It suffers from two known problems, and an unknown number of unknown problems:</p> <ul> <li>I don't know how to traverse a generic container in a way that captures all the linked objects. Therefore, I iterated using <code>in</code>, and hard coded the case of dictionary (to include values, and not just the keys). Obviously, this will not work for other classes like dictionary.</li> <li>I had to hard code the exclusion of <code>str</code> (which is an iterable, and yet does not have links to any other objects). Again, this will break if there are more objects like that.</li> </ul> <p>I suspect that using <code>in</code> is not a good idea, but I'm not sure what else to do.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USmax
    plurals
    1. PL
      singulars
      1. LTLinked
    2. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. PODeep version of sys.getsizeof
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PODeep version of sys.getsizeof
      1. This table or related slice is empty.
      1. VTUpMod
    1. COAh, it's a duplicate question to http://stackoverflow.com/questions/5022725/how-do-i-measure-the-memory-usage-of-an-object-in-python and http://stackoverflow.com/questions/1331471/in-memory-size-of-python-stucture.
      singulars
      1. PODeep version of sys.getsizeof
      1. USmax
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload