How to do a match with small step in cpymad?

[Landau1908]

Hi, Thomas

How to do a match with small step, i.e.1e-6, in cpymad? When I run a small example in cpymad, an error occurs.

python script:
filename:HITFIL.py

# -*- coding: utf-8 -*-
"""
Created on Tue Jun 23 07:42:22 2015

@author: Administrator
"""

from cpymad.madx import Madx
import  numpy as np
import matplotlib.pylab as plt
import scipy.interpolate as itp

m = Madx(command_log='MATCH1.log')
print (m.version)

m.call('../MATCH1.madx')
m.survey(sequence='FODO')

m.match(
  constraints=[
    dict(range='#e', MUX='0.16', MUY='0.25')
    ],
    vary=['QF->K1', 'QD->k1']
    )

twiss = m.twiss(sequence='FODO', columns=['name','s','betx','bety'])
twiss['s'][15] = 12.5
x = np.arange(0,twiss['s'][-1],0.1)
#from scipy import interpolate
#tck = interpolate.splrep(bx, by, s=0)
#y = interpolate.splev(x, tck, der=0)
#y1 = interpolate.interp1d(bx, by, kind='cubic')
y = itp.spline(twiss['s'],twiss['betx'],x)
plt.plot(twiss['s'],twiss['betx'],'ro', label='betx')
plt.plot(x,y,'-k')
plt.plot(twiss['s'],twiss['bety'], label='bety')
plt.legend()
plt.show()

madx script:
filename:MATCH1.madx

//
//MADX Example: simple MATCH
//Author: Y. CH. Feng, IMP
//Date: 04122015

TITLE,'Example 3: MATCH1.MADX';
BEAM, PARTICLE = ELECTRON, PC = 3.0;

D: DRIFT, L = 1.0;
QF: QUADRUPOLE, L = 0.5, K1 := 0.2;
QD: QUADRUPOLE, L = 0.5, K1 := -0.2;

FODO: LINE = (QF, 5*(D), QD, QD, 5*(D), QF);
USE, PERIOD = FODO;

//....match phase advance at the end of cell to 60 and 90 deg respectively
//MATCH, SEQUENCE = FODO;
//CONSTRAINT, SEQUENCE = FODO, RANGE = #E, MUX = 0.16666666, MUY = 0.25;
//VARY, NAME = QF->K1, STEP = 1E-6;
//VARY, NAME = QD->K1, STEP = 1E-6;
//LMDIF, CALLS = 500, TOLERANCE = 1E-20;
//ENDMATCH;

//SELECT, FLAG = SECTORMAP, clear;
//SELECT, FLAG = TWISS, coloumn = name, s, betx, alfx, bety, alfy;
//TWISS, file = MATCH1.dat, sectormap;

//PLOT, HAXIS = S, VAXIS = BETX, BETY, COLOUR = 100;
//VALUE, TABLE(SUMM, Q1); //verify result
//VALUE, TABLE(SUMM, Q2);

error information from cpymad:

runfile('E:/cython_madx/test/cpymad/HITFIL.py', wdir='E:/cython_madx/test/cpymad')
MAD-X 5.02.05 (2015.04.06)
Traceback (most recent call last):

  File "<ipython-input-12-bd24745bd20b>", line 1, in <module>
    runfile('E:/cython_madx/test/cpymad/HITFIL.py', wdir='E:/cython_madx/test/cpymad')

  File "C:\Python27\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 601, in runfile
    execfile(filename, namespace)

  File "C:\Python27\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 66, in execfile
    exec(compile(scripttext, filename, 'exec'), glob, loc)

  File "E:/cython_madx/test/cpymad/HITFIL.py", line 23, in <module>
    vary=['QF->K1', 'QD->k1']

  File "C:\Python27\lib\site-packages\cpymad-0.10.6-py2.7-win32.egg\cpymad\madx.py", line 424, in match
    sequence = self._use(sequence)

  File "C:\Python27\lib\site-packages\cpymad-0.10.6-py2.7-win32.egg\cpymad\madx.py", line 388, in _use
    or not self._libmadx.is_sequence_expanded(sequence)):

  File "C:\Python27\lib\site-packages\cpymad-0.10.6-py2.7-win32.egg\cpymad\_rpc.py", line 93, in DeferredMethod
    funcname, args, kwargs)

  File "C:\Python27\lib\site-packages\cpymad-0.10.6-py2.7-win32.egg\cpymad\rpc_util\client.py", line 80, in _request
    self._conn.send((kind, args))

  File "C:\Python27\lib\site-packages\cpymad-0.10.6-py2.7-win32.egg\cpymad\rpc_util\connection.py", line 53, in send
    return pickle.dump(data, self._send, -1)

  File "C:\Python27\lib\site-packages\cpymad-0.10.6-py2.7-win32.egg\cpymad\_rpc.py", line 93, in DeferredMethod
    funcname, args, kwargs)

  File "C:\Python27\lib\site-packages\cpymad-0.10.6-py2.7-win32.egg\cpymad\rpc_util\client.py", line 91, in _request
    return self._dispatch(response)

  File "C:\Python27\lib\site-packages\cpymad-0.10.6-py2.7-win32.egg\cpymad\rpc_util\client.py", line 97, in _dispatch
    return handler(*args)

  File "C:\Python27\lib\site-packages\cpymad-0.10.6-py2.7-win32.egg\cpymad\rpc_util\client.py", line 101, in _dispatch_exception
    raise exc_info

AttributeError: 
Traceback (most recent call last):
  File "C:\Python27\lib\site-packages\cpymad-0.10.6-py2.7-win32.egg\cpymad\rpc_util\service.py", line 85, in _dispatch
    response = handler(*args)
  File "C:\Python27\lib\site-packages\cpymad-0.10.6-py2.7-win32.egg\cpymad\_rpc.py", line 110, in _dispatch_function_call
AttributeError: 'module' object has no attribute '__getnewargs__'

[coldfix]

Please post minimal example.

[Landau1908]

Sorry, this example is just the simplest one.

[Landau1908]

The error comes from match line, especially at vary=['QF->K1', 'QD->k1']