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# Building Ice for Python on Linux and OS X
This page describes how to build and install Ice for Python from source code on
Linux and OS X. If you prefer, you can also download [binary distributions][1]
for the supported platforms.
## Python Build Requirements
### Operating Systems and Compilers
Ice for Python is expected to build and run properly on OS X and any recent
Linux distribution for x86 and x86_64, and was extensively tested using the
operating systems and compiler versions listed for our [supported platforms][2].
### Python Versions
Ice for Python supports Python versions 2.6, 2.7, and 3.5. Note however that
your Python installation must have been built with a C++ compiler that is
compatible with the one used to build Ice for C++.
### Ice Development Kit
You will need the Ice development kit for C++, which you can install as a binary
distribution or compile from source yourself.
## Building the Python Extension
Change to the Ice for Python source subdirectory:
$ cd python
If you have not built Ice for C++ in the `cpp` subdirectory, set `ICE_HOME` to
the directory of your Ice for C++ installation. For example:
$ export ICE_HOME=/opt/Ice
Edit `config/Make.rules`, modify the installation prefix (if necessary), and
review the comments describing the `PYTHON_VERSION` variable.
Execute `python -V` to verify that the correct Python interpreter is in your
executable search path.
Run `make` to build the extension.
Upon successful completion, run `make install`. You may need additional user
privileges to install in the directory specified by `config/Make.rules`.
## Configuring your Environment for Python
Modify your `PYTHONPATH` environment variable to include the Ice extension
for Python. For example, assuming you installed the extension in the directory
`/opt/Ice`, you would modify your environment as shown below:
$ export PYTHONPATH=/opt/Ice/python:$PYTHONPATH
## Running the Python Tests
After a successful build, you can run the tests as follows:
$ python allTests.py
If everything worked out, you should see lots of `ok` messages. In case of a
failure, the tests abort with `failed`.
[1]: https://zeroc.com/download.html
[2]: https://doc.zeroc.com/display/Ice36/Supported+Platforms+for+Ice+3.6.2
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