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

cirq_aqt
cirq
cirq_core
cirq_ft
cirq_google
cirq_ionq
cirq_pasqal
cirq_rigetti
cirq_web
pyquill
qiskit_aer

Packages mentioned