How do you output segwit bech32 (bc1...) / P2SH (3...) addresses from a bitcoin private key? I have a bitcoin private key and know that it can output a segwit addresses of bech32 bc1... and p2sh 3... formats. How can this be done easily?
Load up electrum 3.1.1+ and enable the "console" and in the console do the following to output the addresses you need by providing your private key:

bech32 format bc1...:


  bitcoin.address_from_private_key("p2wpkh:5Kkzs8XrJNAmf9......")


p2sh format 3...:


  bitcoin.address_from_private_key("p2wpkh-p2sh:5Kkzs8XrJNAmf9VQDFeG......")


you just need to prefix your private key with p2wpkh or p2wpkh-p2sh to get one of them.