Yes, you set the camera position to 1 (for front camera) instead of 0 (for main camera, which is the default).
From the PyS60 documentation:
So, for example:
take_photo([mode, size, zoom, flash, exposure, white balance, position ])
is the camera used if the device, such as Nokia 6680, has several cameras. In Nokia 6680, the camera pointing to the user of the device is located in position 1, whereas the one pointing away from the user is located in position 0. The default position is 0.
image = camera.take_photo(mode = "RGB", size = (176, 144), exposure = "auto", position = 1)
#Remember that resolution for the front camera may be different depending on the device