AttributeError: 'module' object has no attribute 'wavepy'

[michaelrushford]

I wanted to follow the phase screen wiki demo but got this error from "LongRangeImaging = wavepy.wavepy()" when running the code below..

import numpy as np
import wavepy.utils as wpu
import wavepy

Instantiate a default WavePy object

LongRangeImaging = wavepy.wavepy()

Set Turbulence strength parameter

LongRangeImaging.SetCn2Rytov(0.1)

Generation of phase screen

phz_hi = self.PhaseScreen()
#FFT-based phase screens

phz_lo = self.SubHarmonicComp(5)
#sub harmonics

phz = phz_lo + phz_hi
#Component addition

#Iteration and multi-screen approach
for iter in range(0, numberOfIterations,1):
for idxscr in range(0,self.NumScr,1):
phz_hi[:,:,idxscr] = self.PhaseScreen()
#FFT-based phase screens

    phz_lo[:,:,idxscr] = self.SubHarmonicComp(5)
    #sub harmonics

    phz[:,:,idxscr] = phz_lo[:,:,idxscr] + phz_hi[:,:,idxscr]
    #subharmonic compensated phase screens

[3beckjr]

That was an error on my part, rather than "self" it should be the name of the instantiated object, in this case "LongRangeImaging." I've corrected the wiki page to show this.

[3beckjr]

Also, please remember to assign a value to the numberOfIterations variable before the loop. The code that you have posted generates one composite phase screen and then many phase screens, just keep in mind that the code to generate one screen is as follows:

import numpy as np
import wavepy.utils as wpu
import wavepy

LongRangeImaging = wavepy.wavepy()
LongRangeImaging.SetCn2Rytov(0.1)

phz_hi = self.PhaseScreen()
#FFT-based phase screens

phz_lo = self.SubHarmonicComp(5)
#sub harmonics

phz = phz_lo + phz_hi
#Component addition

And if you want to see what the phase screen looks like you need to import the matplotlib library and use imshow. it can be tricky to do, I believe the following is roughly how its done:

import matplotlib as plt

#phase screen generation code here
plt.imshow(phz)
plt.show()