diff --git a/requirements.txt b/requirements.txt
index 1921c99..92f8443 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,4 @@ networkx
 numpy
 matplotlib
 pyyaml
+pandas
diff --git a/simulation.yml b/simulation.yml
deleted file mode 100644
index 37e3488..0000000
--- a/simulation.yml
+++ /dev/null
@@ -1,61 +0,0 @@
----
-name: ControlModelM2_sim
-max_time: 50
-num_trials: 1
-network_params:
-  generator: barabasi_albert_graph
-  n: 100
-  m: 2
-network_agents:
-  - agent_type: ControlModelM2
-    weight: 0.1
-    state:
-      id: 1
-  - agent_type: ControlModelM2
-    weight: 0.9
-    state:
-      id: 0
-environment_params:
-  prob_neutral_making_denier: 0.035
-  prob_infect: 0.075
-  prob_cured_healing_infected: 0.035
-  prob_cured_vaccinate_neutral: 0.035
-  prob_vaccinated_healing_infected: 0.035
-  prob_vaccinated_vaccinate_neutral: 0.035
-  prob_generate_anti_rumor: 0.035
-  standard_variance: 0.055
----
-name: SISA_sm
-max_time: 50
-num_trials: 2
-network_params:
-  generator: erdos_renyi_graph
-  n: 1000
-  p: 0.05
-#other_agents:
-#  - agent_type: DrawingAgent
-network_agents:
-  - agent_type: SISaModel
-    weight: 1
-    state:
-      id: content
-  - agent_type: SISaModel
-    weight: 1
-    state:
-      id: neutral
-  - agent_type: SISaModel
-    weight: 1
-    state:
-      id: discontent
-environment_params:
-  neutral_discontent_spon_prob: 0.04
-  neutral_discontent_infected_prob: 0.04
-  neutral_content_spon_prob: 0.18
-  neutral_content_infected_prob: 0.02
-  discontent_neutral: 0.13
-  discontent_content: 0.07
-  variance_d_c: 0.02
-  content_discontent: 0.009
-  variance_c_d: 0.003
-  content_neutral: 0.088
-  standard_variance: 0.055
diff --git a/soil/__init__.py b/soil/__init__.py
index ef3cf16..a0db181 100644
--- a/soil/__init__.py
+++ b/soil/__init__.py
@@ -4,7 +4,7 @@ import os
 import pdb
 import logging
 
-__version__ = "0.10"
+__version__ = "0.10.1"
 
 try:
     basestring
diff --git a/soil/__main__.py b/soil/__main__.py
index 7a5ff94..c7c70d0 100644
--- a/soil/__main__.py
+++ b/soil/__main__.py
@@ -1,36 +1,4 @@
-import importlib
-import sys
-import os
-import argparse
-import logging
-from . import simulation
-
-logger = logging.getLogger(__name__)
-
-
-def main():
-
-    parser = argparse.ArgumentParser(description='Run a SOIL simulation')
-    parser.add_argument('file', type=str,
-                        nargs="?",
-                        default='simulation.yml',
-                        help='python module containing the simulation configuration.')
-    parser.add_argument('--module', '-m', type=str,
-                        help='file containing the code of any custom agents.')
-    parser.add_argument('--dry-run', '--dry', action='store_true',
-                        help='Do not store the results of the simulation.')
-    parser.add_argument('--output', '-o', type=str,
-                        help='folder to write results to. It defaults to the current directory.')
-
-    args = parser.parse_args()
-
-    if args.module:
-        sys.path.append(os.getcwd())
-        importlib.import_module(args.module)
-
-    print('Loading config file: {}'.format(args.file, args.output))
-    simulation.run_from_config(args.file, dump=not args.dry_run, results_dir=args.output)
-
+from . import main
 
 if __name__ == '__main__':
     main()
diff --git a/soil/environment.py b/soil/environment.py
index d7216cb..0a9e62b 100644
--- a/soil/environment.py
+++ b/soil/environment.py
@@ -145,15 +145,13 @@ class SoilEnvironment(nxsim.NetworkEnvironment):
 
     def __getitem__(self, key):
         if isinstance(key, tuple):
-            values = {"agent_id": key[0],
-                      "t_step": key[1],
-                      "key": key[2],
-                      "value": None,
-                      "value_type": None
-            }
-
-            fields = list(k for k, v in values.items() if v is None)
-            conditions = " and ".join("{}='{}'".format(k, v) for k, v in values.items() if v is not None)
+            values = [("agent_id", key[0]),
+                      ("t_step", key[1]),
+                      ("key", key[2]),
+                      ("value", None),
+                      ("value_type", None)]
+            fields = list(k for k, v in values if v is None)
+            conditions = " and ".join("{}='{}'".format(k, v) for k, v in values if v is not None)
 
             query = """SELECT {fields} from history""".format(fields=",".join(fields))
             if conditions: