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Given the following text description, write Python code to implement the functionality described below step by step
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Description:
 Rigol Waveform Creator
Jan 2016
This is an updated interface to the DG4102 arb generator. It makes use of the usbtmc python library installed via dnf install python3-usbtmc. The basic interface is to create a handle to the instrument and then use write, read, or ask methods on the handle.
Step1:  Now do some waveform creation
Step3:  Now to reverse engineer the VCA response
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Python Code:
import numpy
import matplotlib.pyplot as plt
import usbtmc
%matplotlib inline
# this connects to the instrument directly using it's USB ID:
handle = usbtmc.Instrument(int("1AB1",16),int("0641",16))
# This will probably timeout the first time. Just run it again
handle.ask('*IDN?')
# set voltage high
handle.write(":VOLT:HIGH 2.00")
handle.write(":SOUR1:APPL:USER 100,10,5,0")
Explanation: Rigol Waveform Creator
Jan 2016
This is an updated interface to the DG4102 arb generator. It makes use of the usbtmc python library installed via dnf install python3-usbtmc. The basic interface is to create a handle to the instrument and then use write, read, or ask methods on the handle.
End of explanation
N = 40
x = numpy.array(range(40))
data = 0.99*numpy.exp(-((x-20)/4)**2)
plt.plot(data,"o-")
handle.write(":DATA:POINTS VOLATILE,{}".format(N))
handle.ask(":DATA:POINTS? VOLATILE")
Explanation: Now do some waveform creation:
End of explanation
def VfromI(Intensity):
    Implement the inverted response function. See data fit in google drive AOM folder.
    V = (.0039757327 + (.0039757327 ** 2 + 4 *.0078826605 * Intensity) ** (1/2))/(2*.0078826605)
    return V
voltages = VfromI(data)
floats = voltages/voltages.max() # values scaled to 0-1.0
floats
handle.write(":DATA:POINTS VOLATILE,40")
numPoints = int(handle.ask(":DATA:POINTS? VOLATILE"))
numPoints
for i in range(len(floats)):
    command_string = ":DATA:VAL VOLATILE," + str(i+1) + "," + str(int(0.9*16383*floats[i]))
    check_string = ":DATA:VAL? VOLATILE," + str(i+1)
    #print(command_string)
    handle.write(command_string)
    #print(handle.ask(check_string))
# Check what the instrument memory holds
# For some reason, it can only pull 38 values.
wave = []
# add 1 to numPoints to account for range function
for i in range(1,numPoints+1):
    #sleep(0.2)
    wave.append( handle.ask(":DATA:VALUE? VOLATILE,{}".format(i)) )
    
print(wave)
print(len(wave))
plt.plot(wave,"o-")
handle.close()
Explanation: Now to reverse engineer the VCA response:
End of explanation
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