HeartBleed vulnerability and ActivePython


Is my Community/Business/Enterprise Edition version of ActivePython vulnerable to HeartBleed?


No Enterprise versions of ActivePython are vulnerable.

No Community/Business Edition versions of ActivePython 2.x and no Community/Business Edition versions of ActivePython 3.0, 3.1, and 3.2 are vulnerable to HeartBleed.

Only Community/Business Edition ActivePython and are vulnerable.
An updated 3.3 release will be needed to address the vulnerability.

ActivePython and CVE-2015-1793


Are ActivePython releases affected by CVE-2015-1793?


No ActivePython releases, in any product line, are affected by CVE-2015-1793.

"Error reading from file" during installation


When I try to run the MSI installer, I get a dialog with the message:

Error reading from file C:\Path\to\Some-installer.msi. Verify that the file exists and that you can access it.

This prevents me from installing the software. What's wrong?


The Windows "System" group needs to have access to the file. This problem often occurs when the msi file is saved to a folder without System group permissions and with "Inherit from parent" set.

To solve this, grant the System group Read & Execute permissions for the installer.

See also:

How do I revert to MacPython from ActivePython?


I had MacPython installed, then the ActivePython installer had me move it out of the way. I want to go back to MacPython. How do I do that?


There are three popular Python distributions for Mac OS X.

There is the pre-installed distribution that ships as /usr/bin/python and has its frameworks in /System/Library/Frameworks.

There is also MacPython, the Python distribution from the guys (and
pointed to by This is a 3rd-party Python distro. This installs as
/usr/local/bin/python with its frameworks in /Library/Frameworks.

Then there is ActivePython, our distribution. This also installs as /usr/local/bin/python with its frameworks in /Library/Frameworks -- the same location as MacPython. When ActivePython is being installed the installer will look for MacPython and prompt to move it out of the way, rather than overwrite it. Because of the way Mac OS X works you can only have one of MacPython or ActivePython as the "current" python at a time.

The ActivePython install notes show how to uninstall ActivePython:

Note that this will not restore the MacPython install (it is still
there, just moved to the side). That same "" script used to
uninstall also has the ability to restore the MacPython install, but it
is a little bit of a chicken and egg problem because uninstall
ActivePython will uninstall "".


- copy to a safe place (say ~/tmp), then run this to
uninstall ActivePython

sudo /usr/bin/python activepython_uninstall 2.4

- then this to restore MacPython
sudo /usr/bin/python macpython_restore 2.4

That should work, but isn't too heavily tested.


Just re-install MacPython from its original installer package.

Where can I get past versions of ActivePython?


Where can I get past versions of ActivePython? Is there an ftp server for ActivePython?


Recent past versions of ActiveState Community Edition products are available from our downloads repository via the web at:

Version of ActiveState Products which have aged out of Community Edition are still available, but now require a Business Edition license. If you have a Business Edition license, the products to which your license applies become available from your "My Account" page on our site.

There is no ftp server.

What is the ECCN for ActivePython?


What is the Export Control Classification Number for ActivePython?


The Export Control Classification Number for ActivePython is EAR99 (self-classified). For a brief description of EAR99 and information on the difference between EAR99 and NLR (No License Required), see:

Why doesn't ActivePython use GNU readline?


Why doesn't ActivePython use GNU readline? Why doesn't my up-arrow key recall past commands?


If you've used a build of Python before starting to use ActivePython, you may have grown fond of the command history and editing provided by the use of libreadline. Where Python gives you the last line you entered when you hit up-arrow, ActivePython gives you ^[[A.

ActivePython includes a package manager called PyPM using which you may install readline to make the arrow keys work:

$ pypm install readline

We do not include readline by default in the ActivePython distribution due to licensing restrictions.

What compilers are used to compile ActivePython?


What compilers are used to compile ActivePython? Why?


We base our compiler choice on the lead set by the distributions for the language. That way we keep binary compatibility with extensions for the distribution. Our choice of build environment will continue to follow the lead of the community to ensure this compatibility remains.

On Windows, we use:
Visual Studio 6 for Python 2.3
Visual Studio 7 for Python 2.4
Visual Studio .NET 2003 (7.1) for Python 2.5
and Visual Studio 9.0 for Python 2.6 and higher

There was a thread on the Python-Dev mailing list about switching build environments to VS2005. After some back-and-forth, this message told at least part of the story why changes only happen at major version boundaries.

For Pythons on Linux, we use:
gcc 4.0.2

For Pythons on OS X, we use:
gcc 4.2.1