Examples

Print BPM pvs along with s position

• Print all bpms along with their readback pvs and position in the ring::

  $ ipython

• Import ‘pml’

  >>> import pml.load_csv
  >>> import epics.cs
  

• Initialize the VMX mode

  >>> lattice = pml.load_csv.load('/home/cxa78676/pml/pml/data/', 'VMX', epics.cs.EpicsControlSystem())
  

• Get the BPM elements

  >>> bpms = lattice.get_elements('BPM')
  

• Print the values of the readback pvs on the b1 field

  >>> for bpm in bpms:
  >>>    print(bpm.get_pv_name('x', 'readback'), bpm.get_pv_name('y', 'readback'), 'S position', lattice.get_s(bpm))
  

Get the pv value from the quad elements

• Enter IPpython::

  $ ipython

• Import ‘pml’

  >>> import pml
  

• Initialize the VMX mode

  >>> lattice = pml.load_csv.load('/home/cxa78676/pml/pml/data/', 'VMX', epics.cs.EpicsControlSystem())
  

• Get the Quad elements

  >>> quads = lattice.get_elements('QUAD')
  

• Print the values of the readback pvs on the b1 field

  >>> for quad in quads:
  >>>    print(quad.get_pv_value('b1', 'readback'))
  

Print pv names to file

• Enter IPpython::

  $ ipython

• Import ‘pml’ and epics

  >>> import pml.load_csv
  >>> import epics.cs
  

• Initialize the VMX mode

  >>> lattice = pml.load_csv.load('/home/cxa78676/pml/pml/data/', 'VMX', epics.cs.EpicsControlSystem())
  

• Get the Quad elements

  >>> q1b = lattice.get_elements('Q1B')
  

• Print the pvs to file

  >>> with open('elements_in_families.txt', 'a') as out_file:
  >>>    for quad in q1b:
  >>>       pv_name = element.get_pv_name('b1', 'readback').split(':')[0]
  >>>       out_file.write("{}\n".format(pv_name))