###################### Test Script #########################

root@sonic:/home/admin# cat psu_test.py
from sonic_platform.chassis import Chassis

chas = Chassis()

for psu in chas.get_all_psus():
    print "PSU Name:",psu.get_name()
    print "\tPresence:",psu.get_presence()
    print "\tStatus:",psu.get_status()
    print "\tPowergood Status:",psu.get_powergood_status()
    print "\tSerial No:",psu.get_serial()
    print "\tPart No:",psu.get_model()
    print "\tVoltage:",psu.get_voltage(),"V"
    print "\tCurrent:",psu.get_current(),"A"
    print "\tPower:",psu.get_power(),"W"
root@sonic:/home/admin#

###################### Both PSUs present and powered on #######################

root@sonic:/home/admin# python psu_test.py 
PSU Name: PSU1
	Presence: True
	Status: True
	Powergood Status: True
	Serial No: CN-0T9FNW-28298-398-0136-A00
	Part No: 0T9FNW    
	Voltage: 11.869 V
	Current: 0.453 A
	Power: 5.376657 W
PSU Name: PSU2
	Presence: True
	Status: True
	Powergood Status: True
	Serial No: CN-0T9FNW-28298-398-0102-A00
	Part No: 0T9FNW    
	Voltage: 11.929 V
	Current: 0.604 A
	Power: 7.205116 W
root@sonic:/home/admin# 

###################### PSU1 powered off #######################

root@sonic:/home/admin# python psu_test.py
PSU Name: PSU1
	Presence: True
	Status: False
	Powergood Status: False
	Serial No: NA
	Part No: NA
	Voltage: 0.0 V
	Current: 0.0 A
	Power: 0.0 W
PSU Name: PSU2
	Presence: True
	Status: True
	Powergood Status: True
	Serial No: CN-0T9FNW-28298-398-0102-A00
	Part No: 0T9FNW    
	Voltage: 11.929 V
	Current: 1.094 A
	Power: 13.050326 W
root@sonic:/home/admin# 

###################### PSU1 removed #######################

root@sonic:/home/admin# 
root@sonic:/home/admin# python psu_test.py
PSU Name: PSU1
	Presence: False
	Status: False
	Powergood Status: False
	Serial No: NA
	Part No: NA
	Voltage: 0.0 V
	Current: 0.0 A
	Power: 0.0 W
PSU Name: PSU2
	Presence: True
	Status: True
	Powergood Status: True
	Serial No: CN-0T9FNW-28298-398-0102-A00
	Part No: 0T9FNW    
	Voltage: 11.929 V
	Current: 1.132 A
	Power: 13.503628 W
root@sonic:/home/admin# 

###################### PSU1 inserted #######################

root@sonic:/home/admin# 
root@sonic:/home/admin# python psu_test.py
PSU Name: PSU1
	Presence: True
	Status: False
	Powergood Status: False
	Serial No: NA
	Part No: NA
	Voltage: 0.0 V
	Current: 0.0 A
	Power: 0.0 W
PSU Name: PSU2
	Presence: True
	Status: True
	Powergood Status: True
	Serial No: CN-0T9FNW-28298-398-0102-A00
	Part No: 0T9FNW    
	Voltage: 11.929 V
	Current: 1.094 A
	Power: 13.050326 W
root@sonic:/home/admin# 

###################### PSU1 powered on #######################

root@sonic:/home/admin# python psu_test.py
PSU Name: PSU1
	Presence: True
	Status: True
	Powergood Status: True
	Serial No: CN-0T9FNW-28298-398-0136-A00
	Part No: 0T9FNW    
	Voltage: 11.869 V
	Current: 0.49 A
	Power: 5.81581 W
PSU Name: PSU2
	Presence: True
	Status: True
	Powergood Status: True
	Serial No: CN-0T9FNW-28298-398-0102-A00
	Part No: 0T9FNW    
	Voltage: 11.929 V
	Current: 0.604 A
	Power: 7.205116 W
root@sonic:/home/admin# 

###################### PSU2 powered off #######################

root@sonic:/home/admin# 
root@sonic:/home/admin# python psu_test.py
PSU Name: PSU1
	Presence: True
	Status: True
	Powergood Status: True
	Serial No: CN-0T9FNW-28298-398-0136-A00
	Part No: 0T9FNW    
	Voltage: 11.869 V
	Current: 1.057 A
	Power: 12.545533 W
PSU Name: PSU2
	Presence: True
	Status: False
	Powergood Status: False
	Serial No: NA
	Part No: NA
	Voltage: 0.0 V
	Current: 0.0 A
	Power: 0.0 W
root@sonic:/home/admin# 

###################### PSU2 removed #######################

root@sonic:/home/admin# python psu_test.py
PSU Name: PSU1
	Presence: True
	Status: True
	Powergood Status: True
	Serial No: CN-0T9FNW-28298-398-0136-A00
	Part No: 0T9FNW    
	Voltage: 11.869 V
	Current: 1.094 A
	Power: 12.984686 W
PSU Name: PSU2
	Presence: False
	Status: False
	Powergood Status: False
	Serial No: NA
	Part No: NA
	Voltage: 0.0 V
	Current: 0.0 A
	Power: 0.0 W
root@sonic:/home/admin# 

###################### PSU2 inserted #######################

root@sonic:/home/admin# 
root@sonic:/home/admin# python psu_test.py
PSU Name: PSU1
	Presence: True
	Status: True
	Powergood Status: True
	Serial No: CN-0T9FNW-28298-398-0136-A00
	Part No: 0T9FNW    
	Voltage: 11.869 V
	Current: 1.057 A
	Power: 12.545533 W
PSU Name: PSU2
	Presence: True
	Status: False
	Powergood Status: False
	Serial No: NA
	Part No: NA
	Voltage: 0.0 V
	Current: 0.0 A
	Power: 0.0 W
root@sonic:/home/admin# 

###################### PSU2 powered on #######################

root@sonic:/home/admin# python psu_test.py
PSU Name: PSU1
	Presence: True
	Status: True
	Powergood Status: True
	Serial No: CN-0T9FNW-28298-398-0136-A00
	Part No: 0T9FNW    
	Voltage: 11.869 V
	Current: 0.49 A
	Power: 5.81581 W
PSU Name: PSU2
	Presence: True
	Status: True
	Powergood Status: True
	Serial No: CN-0T9FNW-28298-398-0102-A00
	Part No: 0T9FNW    
	Voltage: 11.929 V
	Current: 0.604 A
	Power: 7.205116 W
root@sonic:/home/admin# 
root@sonic:/home/admin#