pandas - Cleveland's dotplot using Python ggplot

Question

I am very new to ggplot. I am try to create a dotplot in this fashion.

https://stackoverflow.com/a/20621581/229075

I don't have much luck so far. My trial below

df=DataFrame({'label':['a','b','c'],'value':[7,2,4]})
ggplot(aes(x="value",y="label"),df) + geom_point()

Gives me this error

C:\Anaconda\lib\site-packages\numpy\core\numeric.pyc in asanyarray(a, dtype, order)
    510 
    511     """
--> 512     return array(a, dtype, copy=False, order=order, subok=True)
    513 
    514 def ascontiguousarray(a, dtype=None):

ValueError: could not convert string to float: a

I've lookup some a number of docs on R's ggplot. I also have some trouble using construct such as

stat="identity"
coord_flip()
geom_bar(weight=?)

Are these not yet implemented?

I have Python ggplot version 0.5.0.