As one who works with both Python (programming cognitive science experiments) and R (analyzing said experiments), I have a different experience. Thus far I have failed to find a pure python graphics library that achieves the power, simplicity, and sheer well-designedness (new word!) of the R library "ggplot2" (http://had.co.nz/ggplot2/).
Sure I could use rpy, but it seems simpler (for my purposes at least) to isolate the two programming languages.
As one who works with both Python (programming cognitive science experiments) and R (analyzing said experiments), I have a different experience. Thus far I have failed to find a pure python graphics library that achieves the power, simplicity, and sheer well-designedness (new word!) of the R library "ggplot2" (http://had.co.nz/ggplot2/). Sure I could use rpy, but it seems simpler (for my purposes at least) to isolate the two programming languages.