segpy/examples/report.py

#!/usr/bin/env python3

"""Displays a simple report of a SEG Y file.

Usage:

    report.py <in.segy>

"""
from __future__ import print_function

import os

import sys
import traceback

from segpy.reader import create_reader


def report_segy(in_filename):
    with open(in_filename, 'rb') as in_file:

        segy_reader = create_reader(in_file)
        print()
        print("Filename:             ", segy_reader.filename)
        print("SEG Y revision:       ", segy_reader.revision)
        print("Number of traces:     ", segy_reader.num_traces())
        print("Data format:          ",
              segy_reader.data_sample_format_description)
        print("Dimensionality:       ", segy_reader.dimensionality)

        try:
            print("Number of CDPs:       ", segy_reader.num_cdps())
        except AttributeError:
            pass

        try:
            print("Number of inlines:    ", segy_reader.num_inlines())
            print("Number of crosslines: ", segy_reader.num_xlines())
        except AttributeError:
            pass

        print("=== BEGIN TEXTUAL REEL HEADER ===")
        for line in segy_reader.textual_reel_header:
            print(line[3:])
        print("=== END TEXTUAL REEL HEADER ===")
        print()
        print("=== BEGIN EXTENDED TEXTUAL HEADER ===")
        print(segy_reader.extended_textual_header)
        print("=== END EXTENDED TEXTUAL_HEADER ===")


def main(argv=None):
    if argv is None:
        argv = sys.argv[1:]

    try:
        in_filename = argv[0]
    except IndexError:
        print(globals()['__doc__'], file=sys.stderr)
        return os.EX_USAGE

    try:
        report_segy(in_filename)
    except (FileNotFoundError, IsADirectoryError) as e:
        print(e, file=sys.stderr)
        return os.EX_NOINPUT
    except PermissionError as e:
        print(e, file=sys.stderr)
        return os.EX_NOPERM
    except Exception as e:
        traceback.print_exception(type(e), e, e.__traceback__, file=sys.stderr)
        return os.EX_SOFTWARE
    return os.EX_OK


if __name__ == '__main__':
    sys.exit(main())