Convert Private Tiff Tag Into Python Dict

I am trying to read the metadata of this file: https://drive.google.com/file/d/10ZTLRazYbgm4pYEc3M7J7bP6590ZjNtY/view?usp=sharing It is saved in a private tag (34682, see python Ti

Solution 1:

The string you got here turns out to be encoded as xml. You can have a look here on how to convert an xml-string to dict: How to convert an XML string to a dictionary?

Using one of the answers there, I did the following:

In [6]: from xml.etree import cElementTree as ET

In [7]: ET.XML(tif_tags["FEI_TITAN"])
Out[7]: <Element 'Metadata' at 0x7f9be8207630>

In [8]: from copy import copy
   ...: 
   ...: defdictify(r,root=True):
   ...:     if root:
   ...:         return {r.tag : dictify(r, False)}
   ...:     d=copy(r.attrib)
   ...:     if r.text:
   ...:         d["_text"]=r.text
   ...:     for x in r.findall("./*"):
   ...:         if x.tag notin d:
   ...:             d[x.tag]=[]
   ...:         d[x.tag].append(dictify(x,False))
   ...:     return d
   ...: 

In [9]: dictify(ET.XML(tif_tags["FEI_TITAN"]))
Out[9]: 
{'Metadata': {'_text': '\n  ',
  'Core': [{'_text': '\n    ',
    'Guid': [{'_text': '9b7da5e1-be22-4c15-9ea6-3ed4300318c5'}],
    'UserID': [{'_text': 'Supervisor'}],
    'ApplicationSoftware': [{'_text': 'xT'}],
    'ApplicationSoftwareVersion': [{'_text': '0'}]}],
  'Instrument': [{'_text': '\n    ',
    'ControlSoftwareVersion': [{'_text': '20.1.0.7012'}],
    'Manufacturer': [{'_text': 'FEI Company'}],
    'InstrumentClass': [{'_text': 'Aquilos'}],
    'InstrumentID': [{'_text': '9925851'}],
    'ComputerName': [{'_text': 'AS-MPC'}]}],
  'Acquisition': [{'_text': '\n    ',
    'AcquisitionDatetime': [{'_text': '2021-10-12T12:27:43'}],
    'BeamType': [{'_text': 'Ion'}],
    'ColumnType': [{'_text': 'Sidewinder'}]}],
  'Optics': [{'_text': '\n    ',
    'Apertures': [{'_text': '\n      ',
      'Aperture': [{'_text': '\n        ',
        'Number': [{'_text': '1'}],
        'Diameter': [{'_text': '2.5E-05'}]}]}],
    'AccelerationVoltage': [{'_text': '30000'}],
    'SpotSize': [{'_text': '1.7E-08'}],
    'BeamCurrent': [{'_text': '3E-11'}],
    'FullScanFieldOfView': [{'_text': '\n      ',
      'X': [{'_text': '4.8020873382767222E-05'}],
      'Y': [{'_text': '3.2013915588511481E-05'}]}],
    'ScanFieldOfView': [{'_text': '\n      ',
      'X': [{'_text': '4.8020873382767222E-05'}],
      'Y': [{'_text': '3.2013915588511481E-05'}]}],
    'WorkingDistance': [{'_text': '0.018943079512039922'}],
    'BeamShift': [{'_text': '\n      ',
      'X': [{'_text': '-7.4036727128018167E-07'}],
      'Y': [{'_text': '7.8283358087907821E-07'}]}],
    'StigmatorRaw': [{'_text': '\n      ',
      'X': [{'_text': '0'}],
      'Y': [{'_text': '0'}]}]}],
  'StageSettings': [{'_text': '\n    ',
    'StagePosition': [{'_text': '\n      ',
      'X': [{'_text': '-0.0030654519456763526'}],
      'Y': [{'_text': '0.0027469495002475459'}],
      'Z': [{'_text': '0.018902786052566539'}],
      'Rotation': [{'_text': '-1.256433216129438'}],
      'Tilt': [{'_text': '\n        ',
        'Alpha': [{'_text': '0.27925259026082394'}],
        'Beta': [{'_text': '0'}]}]}]}],
  'ScanSettings': [{'_text': '\n    ',
    'DwellTime': [{'_text': '5E-07'}],
    'ScanSize': [{'_text': '\n      ',
      'Width': [{'_text': '1536'}],
      'Height': [{'_text': '1024'}]}],
    'ScanArea': [{'_text': '\n      ',
      'X': [{'_text': '0'}],
      'Y': [{'_text': '0'}],
      'Width': [{'_text': '1536'}],
      'Height': [{'_text': '1024'}]}],
    'LineTime': [{'_text': '0.00078449999999999993'}],
    'LineIntegrationCount': [{'_text': '1'}],
    'LineInterlacing': [{'_text': '1'}],
    'FrameTime': [{'_text': '0.80332799999999993'}],
    'ScanRotation': [{'_text': '3.1415926535897931'}]}],
  'VacuumProperties': [{'_text': '\n    ',
    'SamplePressure': [{'_text': '0.00011099999999999989'}],
    'ElectronSourcePressure': [{'_text': '4.0754869701231304E-08'}],
    'ElectronColumnPressure': [{'_text': '1.5793422392106776E-07'}]}],
  'Detectors': [{'_text': '\n    ',
    'ScanningDetector': [{'_text': '\n      ',
      'DetectorName': [{'_text': 'ETD'}],
      'DetectorType': [{'_text': 'ETD'}],
      'Signal': [{'_text': 'SE'}],
      'Gain': [{'_text': '8.5319006280647329'}],
      'Offset': [{'_text': '-1.6069335895422618'}],
      'GridVoltage': [{'_text': '600'}],
      'ContrastNormalized': [{'_text': '61.334819889093154'}],
      'BrightnessNormalized': [{'_text': '43.305104160356954'}]},
     {'_text': '\n      ',
      'DetectorName': [{'_text': 'ICE'}],
      'DetectorType': [{'_text': 'ICE'}],
      'Signal': [{'_text': 'SE'}],
      'Gain': [{'_text': '54.199464921714458'}],
      'Offset': [{'_text': '0.47536486052042992'}],
      'GridVoltage': [{'_text': '600'}],
      'ContrastNormalized': [{'_text': '45.384756674519814'}],
      'BrightnessNormalized': [{'_text': '54.754484092327296'}]}]}],
  'GasInjectionSystems': [{'_text': '\n    ',
    'Gis': [{'_text': '\n      ',
      'PortName': [{'_text': 'Port1'}],
      'NeedleState': [{'_text': 'Retracted'}],
      'Gases': [{'_text': '\n        ',
        'Gas': [{'_text': '\n          ', 'GasType': [{'_text': 'G1'}]}]}]},
     {'_text': '\n      ',
      'PortName': [{'_text': 'Port2'}],
      'NeedleState': [{'_text': 'Retracted'}],
      'Gases': [{'_text': '\n        ',
        'Gas': [{'_text': '\n          ', 'GasType': [{'_text': 'G2'}]}]}]}]}],
  'BinaryResult': [{'_text': '\n    ',
    'AcquisitionUnit': [{'_text': 'Pixel'}],
    'CompositionType': [{'_text': 'Single'}],
    'ImageSize': [{'_text': '\n      ',
      'X': [{'_text': '1536'}],
      'Y': [{'_text': '1024'}]}],
    'FilterType': [{'_text': 'Integrate'}],
    'FilterFrameCount': [{'_text': '1'}],
    'PixelSize': [{'_text': '\n      ',
      'X': [{'unit': 'm',
        'unitPrefixPower': '1',
        '_text': '3.1263589441905743E-08'}],
      'Y': [{'unit': 'm',
        'unitPrefixPower': '1',
        '_text': '3.1263589441905743E-08'}]}],
    'IntensityScale': [{'_text': '1'}],
    'IntensityOffset': [{'_text': '0'}],
    'Gamma': [{'_text': '1'}],
    'AcquisitionArea': [{'_text': '\n      ',
      'X': [{'_text': '0'}],
      'Y': [{'_text': '0'}],
      'Width': [{'_text': '1'}],
      'Height': [{'_text': '1'}]}]}],
  'CustomSectionGroup': [{'_text': '\n    ',
    'CustomSection': [{'scope': 'StageCollection',
      '_text': '\n      ',
      'StageCollection': [{'_text': '\n        ',
        'Stage': [{'_text': '\n          ',
          'Type': [{'_text': 'BulkStage'}],
          'X': [{'_text': '-3.57633333333333 mm'}],
          'Y': [{'_text': '3.30025 mm'}],
          'Z': [{'_text': '36.2439236111111 mm'}],
          'R': [{'_text': '288.011679475735 °'}],
          'AT': [{'_text': '15.9999948400413 °'}],
          'BT': [{}]}]}]},
     {'scope': 'ApplicationInfo',
      '_text': '\n      ',
      'ApplicationInfo': [{'_text': '\n        ',
        'AutomationCoreVersion': [{'_text': '1.675.2'}],
        'AutomationCoreCommitId': [{'_text': '61efd0fd6a1b26289090960a7798059b497eeb42]'}],
        'ApplicationName': [{}],
        'ApplicationVersion': [{}],
        'ApplicationCommitId': [{}]}]}]}]}}