import numpy as np

import pyqtgraph as pg
import pyqtgraph.multiprocess as mp

print("\n=================\nStart Process")
proc = mp.Process()
import os

print("parent:", os.getpid(), "child:", proc.proc.pid)
print("started")
rnp = proc._import('numpy')
arr = rnp.array([1,2,3,4])
print(repr(arr))
print(str(arr))
print("return value:", repr(arr.mean(_returnType='value')))
print( "return proxy:", repr(arr.mean(_returnType='proxy')))
print( "return auto: ", repr(arr.mean(_returnType='auto')))
proc.join()
print( "process finished")



print( "\n=================\nStart ForkedProcess")
proc = mp.ForkedProcess()
rnp = proc._import('numpy')
arr = rnp.array([1,2,3,4])
print( repr(arr))
print( str(arr))
print( repr(arr.mean()))
proc.join()
print( "process finished")




import pyqtgraph as pg

app = pg.mkQApp("Multiprocess Example")

print( "\n=================\nStart QtProcess")
import sys

if (sys.flags.interactive != 1):
    print( "   (not interactive; remote process will exit immediately.)")
proc = mp.QtProcess()
d1 = proc.transfer(np.random.normal(size=1000))
d2 = proc.transfer(np.random.normal(size=1000))
rpg = proc._import('pyqtgraph')
plt = rpg.plot(d1+d2)