Python open_truncate Examples

Example #1

File: test_util.py Project: firoorg/old-electrumx

def test_open_fns(tmpdir):
    tmpfile = os.path.join(tmpdir, 'file1')
    with pytest.raises(FileNotFoundError):
        util.open_file(tmpfile)
    with util.open_file(tmpfile, create=True) as f:
        f.write(b'56')
    with util.open_file(tmpfile) as f:
        assert f.read(3) == b'56'

    # Test open_truncate truncates and creates
    with util.open_truncate(tmpfile) as f:
        assert f.read(3) == b''
    tmpfile = os.path.join(tmpdir, 'file2')
    with util.open_truncate(tmpfile) as f:
        assert f.read(3) == b''

Example #2

File: peers.py Project: xHire/electrumx

 def write_peers_file(self):
     with util.open_truncate(PEERS_FILE) as f:
         f.write(self.serialize().encode())
     self.logger.info('wrote out {:,d} peers'.format(len(self.peers)))