pvs.yml

gistfile1.txt

"CSX-1 Scalars":
  EpicsScaler:
    pimte_tot1:
      record: XF:23ID1-ES{Dif-Cam:PIMTE}Stats1:Total_RBV
      numchan: 32
  EpicsSignal:
    sclr_trig:
      read_pv: XF:23ID1-ES{Sclr:1}.CNT
    sclr_ch1:
      read_pv: XF:23ID1-ES{Sclr:1}.S1
    sclr_ch2:
      read_pv: XF:23ID1-ES{Sclr:1}.S2
    sclr_ch3:
      read_pv: XF:23ID1-ES{Sclr:1}.S3
    sclr_ch4:
      read_pv: XF:23ID1-ES{Sclr:1}.S4
    sclr_ch5:
      read_pv: XF:23ID1-ES{Sclr:1}.S5
    sclr_ch6:
      read_pv: XF:23ID1-ES{Sclr:1}.S6
    temp_a:
      read_pv: XF:23ID1-ES{TCtrl:1-Chan:A}T-I
    temp_b:
      read_pv: XF:23ID1-ES{TCtrl:1-Chan:B}T-I

"Area detector beam instrumentation":
  ProsilicaDetector:
    fs1_cam:
      prefix: XF:23IDA-BI:1{FS:1-Cam:1}
    diag3_cam:
      prefix: XF:23ID1-BI{Diag:3-Cam:1}
    diag5_cam:
      prefix: XF:23ID1-BI{Diag:5-Cam:1}
    diag6_cam:
      prefix: XF:23ID1-BI{Diag:6-Cam:1}
    dif_beam_cam:
      prefix: XF:23ID1-ES{Dif-Cam:Beam}

"Princeton CCD Camera":
  EpicsSignal:
    pimte_tot1:
      read_pv: XF:23ID1-ES{Dif-Cam:PIMTE}Stats1:Total_RBV
    pimte_tot2:
      read_pv: XF:23ID1-ES{Dif-Cam:PIMTE}Stats2:Total_RBV
    pimte_tot3:
      read_pv: XF:23ID1-ES{Dif-Cam:PIMTE}Stats3:Total_RBV
    pimte_tot4:
      read_pv: XF:23ID1-ES{Dif-Cam:PIMTE}Stats4:Total_RBV
    pimte_tot5:
      read_pv: XF:23ID1-ES{Dif-Cam:PIMTE}Stats5:Total_RBV

read_pvs.py

# check that alias is a valid python identifier
import re
import tokenize
import keyword
import os
import yml
import ophyd

def is_valid_identifier(alias):
    """Check that the alias is a valid python identifier

    Returns
    -------
    True if valid
    False if not
    """
    return re.match(tokenize.Name + '$', alias) and not keyword.iskeyword(alias)


yml_pvs = os.path.join(os.path.expanduser('~'), '.config', 'ophyd', 'pvs.yml')
with open(yml_pvs, 'r') as f:
    config = yaml.load(f)

# loop over and ignore the top level 'namespacing'
for group_name, grouping in config.items():

    for cls_name, obj_info in grouping.items():
        # these are your different classes
        cls = getattr(controls, cls_name)
        for alias, info in obj_info.items():
            info['name'] = info.get('name', alias)
            if not is_valid_identifier(alias):
                raise ValueError('Alias {} is not a valid python object name'
                                 ''.format(alias))
            print('setting attribute {}'.format(alias))
            setattr(sys.modules['__main__'], alias, cls(**info))