Enveloped In Python

My pet, my pet-how fun you are
 I trust you so much I even leave the cage door ajar
 You'd never harm me, but just to be safe-I admire you from afar
 The coiling is fast
 This time it's your last
 Your soul asphyxiated
 Final chance for escape terminated
 Enveloped in python
 Constriction complete
 So harmless-me the master-you the slave
 I reach out to touch you-I'm getting so brave
 You affect me but little-I still haven't changed
 And to those who find me abrasive-it's you that's deranged
 The coiling is fast
 This time it's your last
 Your soul asphyxiated
 Final chance for escape terminated
 Enveloped in python
 Constriction complete
 Where dreams become nightmares
 Of total defeat
 Not just a white line or addiction of some kind
 But entanglement with anger or to bitterness bind