import re
input = """
1 2
3 4
51 62
73 94
"""
result = re.findall(r'(\d+ \d+)', input)
print(result)
try:
_libname = _find_library('sndfile')
if _libname is None:
raise OSError('sndfile library not found')
_snd = _ffi.dlopen(_libname)