Traceback (most recent call last):


 "<stdin>", line 1, in <module>


 "/home/lejla/sympy/sympy/printing/rust.py", line 620, in rust_code

return RustCodePrinter(settings).doprint(expr, assign_to)


 "/home/lejla/sympy/sympy/printing/codeprinter.py", line 81, in doprint

lines = self._print(expr).splitlines()


 "/home/lejla/sympy/sympy/printing/printer.py", line 257, in _print

return getattr(self, printmethod)(expr, *args, **kwargs)


 "/home/lejla/sympy/sympy/printing/rust.py", line 439, in _print_MatrixBase

if A.cols == 1:

AttributeError: 'MatrixElement' object has no attribute 'cols'

_print_MatrixBase()` in `rust.py` is executed instead of `_print_MatrixElement()
```

Traceback (most recent call last):


 "train.py", line 120, in <module>

run(args, parser)


 "train.py", line 114, in run

queue_trials=args.queue_trials)


 "/usr/local/CHUBBY/DYNAMIC/SRC/pathway/ray/python/ray/rllib/venv/lib/python3.5/site-packages/ray/tune/tune.py", line 83, in run_experiments

scheduler.add_experiment(experiment, runner)


 "/usr/local/CHUBBY/DYNAMIC/SRC/pathway/ray/python/ray/rllib/venv/lib/python3.5/site-packages/ray/tune/trial_scheduler.py", line 62, in add_experiment

trial_runner.add_trial(next(generator))


 "/usr/local/CHUBBY/DYNAMIC/SRC/pathway/ray/python/ray/rllib/venv/lib/python3.5/site-packages/ray/tune/variant_generator.py", line 75, in generate_trials

max_failures=args.max_failures)


 "/usr/local/CHUBBY/DYNAMIC/SRC/pathway/ray/python/ray/rllib/venv/lib/python3.5/site-packages/ray/tune/trial.py", line 97, in __init__

if not has_trainable(trainable_name):


 "/usr/local/CHUBBY/DYNAMIC/SRC/pathway/ray/python/ray/rllib/venv/lib/python3.5/site-packages/ray/tune/trial.py", line 61, in has_trainable

ray.tune.registry.TRAINABLE_CLASS, trainable_name)


 "/usr/local/CHUBBY/DYNAMIC/SRC/pathway/ray/python/ray/rllib/venv/lib/python3.5/site-packages/ray/tune/registry.py", line 83, in contains

value = _internal_kv_get(_make_key(category, key))


 "/usr/local/CHUBBY/DYNAMIC/SRC/pathway/ray/python/ray/rllib/venv/lib/python3.5/site-packages/ray/experimental/internal_kv.py", line 17, in _internal_kv_get

return worker.redis_client.hget(key, "value")
AttributeError: 'Worker' object has no attribute 'redis_client'
