ERROR: ga/basic_example_main_run.py
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Traceback (most recent call last):
  File "/home/askhl/src/ase/ase/test/__init__.py", line 51, in testfile
    exec(compile(fd.read(), self.filename, 'exec'), {})
  File "/home/askhl/src/ase/ase/test/ga/basic_example_main_run.py", line 83, in <module>
    write('all_candidates.traj', da.get_all_relaxed_candidates())
  File "/home/askhl/src/ase/ase/io/formats.py", line 230, in write
    _write(filename, fd, format, io, images, **kwargs)
  File "/home/askhl/src/ase/ase/io/formats.py", line 266, in _write
    io.write(filename, images, **kwargs)
  File "/home/askhl/src/ase/ase/io/trajectory.py", line 341, in write_traj
    trj.write(atoms)
  File "/home/askhl/src/ase/ase/io/trajectory.py", line 152, in write
    write_atoms(b, atoms, write_header=(len(b) == 0))
  File "/home/askhl/src/ase/ase/io/trajectory.py", line 308, in write_atoms
    numbers=atoms.numbers)
  File "/home/askhl/src/ase/ase/io/ulm.py", line 268, in write
    self.fill(value)
  File "/home/askhl/src/ase/ase/io/ulm.py", line 206, in fill
    a.tofile(self.fd)
IOError: first argument must be an open file