Then you need to scale and your library isn't actually built in C... or only runs on 2.x (or 3.x) and the cocoon seals up and you can't escape... you scream but no one can hear you... you look for help, desperately clawing at cython, numpy, jython, pypy and C extensions -- they all require you to leave your cocoon far behind... you struggle and break free... suddenly you are exposed to the big wide world outside of your cocoon... you look back and realize the cocoon was just a cleverly disguised prison. /hackernewsstorytime
hahah well I am very comfortable with C and other languages, but I love python for it's versatility and ease of use! It has some very expressive one liners that are surprisingly coherent for being one liners.
And Go doesn't really qualify for any of these. For the latter 2 largely because of the GC.
I think in practice, that its engineering bent i.e. no frills language and high quality tooling, will more likely see it being used in the server-side application/middleware space. I guess not surprisingly.
So it really is up against Java, Python, Ruby and C++ and is, therefore, interesting in that it isn't trying to compete on lingustic goodies.
I loved python and wouldn't've given any of it up. Then I switched to Scala and discovered how much I could get the computer to do for me, without giving up the conciseness, readability and expressiveness of Python.