Lets say I have a bitcoin address that has 10 BTC sent to it. I also have the private key for this address

Using Python (2 or 3) is there a way to create a signed transaction (which I believe is a long string of hex digits) that can then be sent to an external service (bockchain.info or whatever) for network propogation.

It seems all the python libraries for making transactions require a connection to the bitcoind rpc interface. In my application, there will be no locally ran bitcoind.

I'm thinking the code I'm looking for is like this:

address = '1ALis8zeW1XduXf98ZjoL4EKLen5mVA1q4'
private = '5KiUZd5as1TKsiwnt1KiPgiECtXiuF9BS1MxrAgedNrXcScm4d5'

from some_btc_library import make_transaction

tx_hex = make_transaction(
    inputs=[[address, private]],
    to='123rn4tNGhf1ZehQHLohYn8WRQYhjeGSCw',
    amount=3,
    miner_fee=0.0001
)

send_to_exteral_service(tx_hex)
print "transaction complete"