NIST-ITL Parser Library

Release v0.2.

CeCILL-C Python 3.x

Installation

nistitl is published on PyPI and can be installed from there:

pip install -U nistitl

Getting Started

To generate a NIST-ITL binary message:

msg = nistitl.Message()
msg.TOT = 'MY_TOT'

r2 = nistitl.AsciiRecord(2)
r2 += nistitl.Field(2,3,alias='TEST')
msg += r2

buffer = msg.NIST

To parse a NIST-ITL binary message:

msg = nistitl.Message()
msg.parse(buffer)
print("The TOT is ",msg.TOT)
for record in msg.iter(2):
    print("Field 2.003 is ",record._3)

Full Example

Build a NIST

msg = nistitl.Message()
msg.TOT = 'MY_TOT'
msg[0].TCN = 'TCN'

# --- Add a type 2 record
r2 = nistitl.AsciiRecord(2)
msg += r2
r2.IDC = 1
# Add field 2.003, long notation used to specify an alias
r2 += nistitl.Field(2,3,alias='TEST')
# Add field 2.004, with 2 subfields) using the short notation
r2._4 = ('SF1', 'SF2')

# --- Add a type 4 record
r4 = nistitl.BinaryRecord(4)
msg += r4
r4.IDC = 2
# Set all fields in one step, image and headers
r4.pack("!HH", 500, 500, b'image')

# --- Add a type 10 record
r10 = nistitl.AsciiRecord(10)
msg += r10
r10.IDC = 3
# Used pre-defined alias
r10.SRC = 'my src'
r10.DATA = b'image'

# Generate the NIST buffer
buffer = msg.NIST

Parse a NIST

msg = nistitl.Message()
msg.parse(buffer)

# --- Access type 2 record
r2 = msg[(2, 1)]
# Read field 2.003
v = r2._3

# --- Loop on all records of type 4
for r4 in msg.iter(4):
    # Get all fields
    width, height, data = r4.unpack("!HH")

# --- Loop on all records of type 10
for r10 in msg.iter(10):
    # Used pre-defined alias
    src = r10.SRC
    image = r10.DATA