There are many python packages dedicated to quantum computations. The diagram below shows a simple visualization of existing dependencies, up to date as of today ( see date above ). The arrow flows from the dependency to the dependent, i.e. cirq_rigetti depends on pyquill, and not the other way around

stateDiagram
	cirq_aqt --> cirq  
	cirq_core --> cirq  
	cirq_ft --> cirq  
	cirq_google --> cirq  
	cirq_ionq --> cirq  
	cirq_pasqal --> cirq  
	cirq_rigetti --> cirq  
	cirq_web --> cirq
	cirq_core --> cirq_aqt
	cirq_core --> cirq_ft
	cirq_core --> cirq_google
 	  cirq_core --> cirq_ionq
  	cirq_core --> cirq_pasqal
  	cirq_core --> cirq_rigetti
 	  cirq_core --> cirq_web
 	  cirq_rigetti --> pyquill
	qiskit_aer --> cirq

Packages mentioned