The direct answer is almost certainly not.

There are some auspicious developments so that you might be able to adapt a specific open source Python package, but the resulting software would require a special Arduino board with an MCU chip with much more SRAM and a higher clock speed than we usually see on Arduino boards.

Discussion

I have looked several times and have never found anything.

I did find a "stripped down" implementation of a Python 3.3 interpreter called [Micro Python][1]. The software was developed hand in hand with MicroPy, an ARM-based single board computer (also described at the MicroPython website). MicroPy is closer to a Raspberry Pi or Beaglebone than an Arduino. However, the software environment is less complex because the MicroPy doesn't require a Linux-based or other operating system.

The base Micro Python package software package seems to require about 110KB of SRAM to boot up and expects a 1 MB SD chip with a boot record and MicroPython on it.

The Micro Python software was released under the MIT open source license so, in theory, a clever person could adapt it for the Arduino if they built a board with a really powerful chip SD socket.

Although the Micro Python/MicroPy package is very appealing, I don't think I would head down the path. I would rather be programming for hardware that is available from more than one source.

Another potential issue is that the Micro Python implementation uses a mark and sweep garbage collector which might tie up the processor for 4 msec at time. Depending on your application a 4 msec busy period might not be acceptable.

[1]: http://micropython.org is the citation for all the factual information on Micro Python and MicroPy that I included here.

The direct answer is almost certainly not.

There are some auspicious developments so that you might be able to adapt a specific open source Python package, but the resulting software would require a special Arduino board with an MCU chip with much more SRAM and a higher clock speed than we usually see on Arduino boards.

Discussion

I have looked several times and have never found anything.

I did find a "stripped down" implementation of a Python 3.3 interpreter called Micro Python. The software was developed hand in hand with MicroPy, an ARM-based single board computer (also described at the MicroPython website). MicroPy is closer to a Raspberry Pi or Beaglebone than an Arduino. However, the software environment is less complex because the MicroPy doesn't require a Linux-based or other operating system.

The base Micro Python package software package seems to require about 110KB of SRAM to boot up and expects a 1 MB SD chip with a boot record and MicroPython on it.

The Micro Python software was released under the MIT open source license so, in theory, a clever person could adapt it for the Arduino if they built a board with a really powerful chip SD socket.

Although the Micro Python/MicroPy package is very appealing, I don't think I would head down the path. I would rather be programming for hardware that is available from more than one source.

Another potential issue is that the Micro Python implementation uses a mark and sweep garbage collector which might tie up the processor for 4 msec at time. Depending on your application a 4 msec busy period might not be acceptable.