replace_multiline.py

from __future__ import absolute_import
from __future__ import print_function

import sys
import os

try:
    repname = os.path.dirname(os.path.abspath(sys.argv[1])) + '/tmp.v'
    rep = open(repname, 'r')
    f = open(sys.argv[1], 'r')
except:
    exit(0)

new_lines = []

while True:
    line = f.readline()
    if line.startswith('expected_verilog'):
        while True:
            line = f.readline()
            if line.startswith('"""'):
                break

        new_lines.append('expected_verilog = """')
        new_lines.extend(rep.readlines())
        new_lines.append('"""')

        new_lines.extend(f.readlines())
        break

    else:
        new_lines.append(line)


with open(sys.argv[1], 'w') as f:
    f.writelines(new_lines)