Providing an primitive hint T should pass an array of T

(not just convert the array of strings to a string "['value']" haha

Author: illusional

cwlgen/utils.py

@@ -120,7 +120,7 @@ def get_required_input_params_for_cls(cls, valuesdict):
             argspec = inspect.getargspec(cls.__init__)
 
         args, defaults = argspec.args, argspec.defaults
-        required_param_keys = set(args[1:-len(defaults)]) if len(defaults) > 0 else args[1:]
+        required_param_keys = set(args[1:-len(defaults)]) if defaults is not None and len(defaults) > 0 else args[1:]
 
         inspect_ignore_keys = {"self", "args", "kwargs"}
         # Params can't shadow the built in 'id', so we'll put in a little hack
@@ -160,6 +160,8 @@ def try_parse_type(value, T):
         # if T is a primitive (str, bool, int, float), just return the T representation of retval
         elif T in _unparseable_types:
             try:
+                if isinstance(value, list):
+                    return [T(v) for v in value]
                 return T(value)
             except:
                 return None

cwlgen/workflowdeps.py

@@ -166,7 +166,7 @@ class WorkflowStep(Serializable):
     # dict['in'] gets converted to dict['inputs'] as 'in' is a reserved keyword
     parse_types = {
         "inputs": [[WorkflowStepInput]],
-        "out": [[WorkflowStepOutput]]
+        "out": [str, [WorkflowStepOutput]]
     }
 
     def __init__(self, step_id, run, label=None, doc=None, scatter=None, scatter_method=None):