pip install pyPM5

from pyPM5 import pyPM5

from pyPM5 import pyPM5
power_meter = pyPM5.PM5()
PM5.list_resources()
>>> ["ASRL1::INSTR"]
power_meter.connect("ASRL1::INSTR")
power_meter.read_power()
>>> 0.00215

builtins.object
    PM5

class PM5(builtins.object)
 |  A class that wraps the pyvisa object and allows for automatic power readings and
 |  range changes. The "powermeter" object contains the original pyvisa object that is used for
 |  communication. The read_power function basically sends a write/read command and interprets the returned information.
 |
 |  Methods defined here:
 |
 |  __init__(self)
 |      Initialize self.  See help(type(self)) for accurate signature.
 |
 |  close(self)
 |
 |  connect(self, COMport)
 |      Connect device using COM port
 |      Args:
 |          COMport (str): string containing COM port as listed by rm.list_resources(), e.g ASRL16::INSTR
 |
 |  read(self, num_of_bytes)
 |      Allows access to native pyvisa object read_bytes function
 |      Args:
 |          num_of_bytes (int): number of bytes to be read by function
 |
 |  read_power(self)
 |      Returns the a single reading in units of watts, and updates
 |      range_setting and cal_factor properties. Note that currently the conversion assumes a positive reading, as
 |      it uses unsigned integers
 |
 |  set_range(self, range_index, range_hold=1)
 |      Manually set the reading range, whilst the front panel is set to "Remote".
 |      Args:
 |          range_index (int) : index corresponding to the chosen power meter range
 |              1 : 200 microW
 |              2 : 2 mW
 |              3 : 20 mW
 |              4 : 200 mW
 |              5 : 200 uW auto
 |              6 : 2 mW auto
 |              7 : 20 mW auto
 |              8 : 200 mW auto
 |          range_hold (int): variable to choose whether to activate range hold mode, i.e to stop it
 |              automatically changing.
 |              0 : Range hold off
 |              1 : Range hold on
 |
 |  set_zero(self)
 |      Remotely zeros the powermeter
 |
 |  write(self, x)
 |      Allows access to native pyvisa object write function
 |
 |  ----------------------------------------------------------------------
 |  Data descriptors defined here:
 |
 |  __dict__
 |      dictionary for instance variables (if defined)
 |
 |  __weakref__
 |      list of weak references to the object (if defined)