release memory when working with pil

When the right-hand side of this statement is executed:

image = image.convert('RGB')

Suggestion : 2

We do not provide binaries for OS X. So you’ll need XCode to install Pillow. (XCode 4.2 on 10.6 will work with the Official Python binary distribution. Otherwise, use whatever XCode you used to compile Python.),As more time passes since the last PIL release, the likelyhood of a new PIL release decreases. However, we’ve yet to hear an official “PIL is dead” announcement. So if you still want to support PIL, please report issues here first:,Pillow is a functional drop-in replacement for the Python Imaging Library. To run your existing PIL-compatible code with Pillow, it needs to be modified to import the Imaging module from the PIL namespace instead of the global namespace. I.e. change:,Pillow is the “friendly” PIL fork by Alex Clark and Contributors. PIL is the Python Imaging Library by Fredrik Lundh and Contributors.

You can install Pillow with pip:

$ pip install Pillow

Or easy_install (for installing Python Eggs, as pip does not support them):

$ easy_install Pillow

Or download the compressed archive from PyPI, extract it, and inside it run:

$ python setup.py install

If the prerequisites are installed in the standard library locations for your machine (e.g. /usr or /usr/local), no additional configuration should be required. If they are installed in a non-standard location, you may need to configure setuptools to use those locations (i.e. by editing setup.py and/or setup.cfg). Once you have installed the prerequisites, run:

$ pip install Pillow

We do not provide binaries for Linux. If you didn’t build Python from source, make sure you have Python’s development libraries installed. In Debian or Ubuntu:

$ sudo apt - get install python - dev python - setuptools

Or for Python 3:

$ sudo apt - get install python3 - dev python3 - setuptools

Prerequisites are installed on Ubuntu 10.04 LTS with:

$ sudo apt - get install libtiff4 - dev libjpeg62 - dev zlib1g - dev libfreetype6 - dev liblcms1 - dev tcl8 .5 - dev tk8 .5 - dev

The easiest way to install the prerequisites is via Homebrew. After you install Homebrew, run:

$ brew install libtiff libjpeg webp littlecms

If you’ve built your own Python, then you should be able to install Pillow using:

$ pip install Pillow

$ easy_install Pillow

$ pip install--use - wheel Pillow

Suggestion : 3

Lua does automatic memory management. A program only creates objects (tables, functions, etc.); there is no function to delete objects. Lua automatically deletes objects that become garbage, using garbage collection. That frees you from most of the burden of memory management and, more important, frees you from most of the bugs related to that activity, such as dangling pointers and memory leaks. ,Unlike some other collectors, Lua's garbage collector has no problems with cycles. You do not need to take any special action when using cyclic data structures; they are collected like any other data. Nevertheless, sometimes even the smarter collector needs your help. No garbage collector allows you to forget all worries about memory management. , This first edition was written for Lua 5.0. While still largely relevant for later versions, there are some differences.The fourth edition targets Lua 5.3 and is available at Amazon and other bookstores.By buying the book, you also help to support the Lua project. ,Notice that only objects can be collected from a weak table. Values, such as numbers and booleans, are not collectible. For instance, if we insert a numeric key in table a (from our previous example), it will never be removed by the collector. Of course, if the value corresponding to a numeric key is collected, then the whole entry is removed from the weak table.

The weakness of a table is given by the field __mode of its metatable. The value of this field, when present, should be a string: If the string contains the letter `k´ (lower case), the keys in the table are weak; if the string contains the letter `v´ (lower case), the values in the table are weak. The following example, although artificial, illustrates the basic behavior of weak tables:

    a = {}
    b = {}
    setmetatable(a, b)
    b.__mode = "k"--now `a' has weak keys
    key = {}               -- creates first key
    a[key] = 1
    key = {}               -- creates second key
    a[key] = 2
    collectgarbage()       -- forces a garbage collection cycle
    for k, v in pairs(a) do print(v) end
      --> 2