Format the output of the data set printing

This example illustrates how to print the data set in your own format.

 Image Type = ['DERIVED', 'SECONDARY', 'OTHER']
 Instance Creation Date = '20040826'
 Instance Creation Time = '185434'
 Instance Creator UID = '1.3.6.1.4.1.5962.3'
 SOP Class UID = '1.2.840.10008.5.1.4.1.1.4'
 SOP Instance UID = '1.3.6.1.4.1.5962.1.1.4.1.1.20040826185059.5457'
 Study Date = '20040826'
 Series Date = ''
 Acquisition Date = ''
 Study Time = '185059'
 Series Time = ''
 Acquisition Time = ''
 Accession Number = ''
 Modality = 'MR'
 Manufacturer = 'TOSHIBA_MEC'
 Institution Name = 'TOSHIBA'
 Referring Physician's Name = ''
 Timezone Offset From UTC = '-0400'
 Station Name = '000000000'
 Name of Physician(s) Reading Study = '----'
 Operators' Name = '----'
 Manufacturer's Model Name = 'MRT50H1'
 Patient's Name = 'CompressedSamples^MR1'
 Patient ID = '4MR1'
 Patient's Birth Date = ''
 Patient's Sex = 'F'
 Patient's Size = None
 Patient's Weight = '80.0'
 Contrast/Bolus Agent = ''
 Scanning Sequence = 'SE'
 Sequence Variant = 'NONE'
 Scan Options = ''
 MR Acquisition Type = '3D'
 Slice Thickness = '0.8'
 Repetition Time = '4000.0'
 Echo Time = '240.0'
 Number of Averages = '1.0'
 Imaging Frequency = '63.924339'
 Imaged Nucleus = 'H'
 Echo Number(s) = '1'
 Echo Train Length = None
 Device Serial Number = '-0000200'
 Software Versions = 'V3.51*P25'
 Flip Angle = '90.0'
 Patient Position = 'HFS'
 Study Instance UID = '1.3.6.1.4.1.5962.1.2.4.20040826185059.5457'
 Series Instance UID = '1.3.6.1.4.1.5962.1.3.4.1.20040826185059.5457'
 Study ID = '4MR1'
 Series Number = '1'
 Acquisition Number = '0'
 Instance Number = '1'
 Image Position (Patient) = [-83.9063, -91.2000, 6.6406]
 Image Orientation (Patient) = [1.0000, 0.0000, 0.0000, 0.0000, 1.0000, 0.0000]
 Frame of Reference UID = '1.3.6.1.4.1.5962.1.4.4.1.20040826185059.5457'
 Laterality = ''
 Position Reference Indicator = ''
 Slice Location = '0.0'
 Image Comments = 'Uncompressed'
 Samples per Pixel = 1
 Photometric Interpretation = 'MONOCHROME2'
 Rows = 64
 Columns = 64
 Pixel Spacing = [0.3125, 0.3125]
 Bits Allocated = 16
 Bits Stored = 16
 High Bit = 15
 Pixel Representation = 1
 Smallest Image Pixel Value = 0
 Largest Image Pixel Value = 4000
 Window Center = '600.0'
 Window Width = '1600.0'
<item not printed -- in the "don't print" list>
 Data Set Trailing Padding = b'\n\x00\xfe\x00\x04\x00\x01\x00\x00\x00\x00\x00\x...

# authors : Guillaume Lemaitre <g.lemaitre58@gmail.com>
# license : MIT

from pydicom import examples

print(__doc__)


def myprint(ds, indent=0):
    """Go through all items in the dataset and print them with custom format

    Modelled after Dataset._pretty_str()
    """
    dont_print = ["Pixel Data", "File Meta Information Version"]

    indent_string = "   " * indent
    next_indent_string = "   " * (indent + 1)

    for elem in ds:
        if elem.VR == "SQ":  # a sequence
            print(indent_string, elem.name)
            for sequence_item in elem.value:
                myprint(sequence_item, indent + 1)
                print(next_indent_string + "---------")
        else:
            if elem.name in dont_print:
                print("""<item not printed -- in the "don't print" list>""")
            else:
                repr_value = repr(elem.value)
                if len(repr_value) > 50:
                    repr_value = repr_value[:50] + "..."
                print(f"{indent_string} {elem.name} = {repr_value}")


ds = examples.mr
myprint(ds)