diff --git a/epanet/epanet.py b/epanet/epanet.py
index ce661be..1ad3169 100644
--- a/epanet/epanet.py
+++ b/epanet/epanet.py
@@ -13,11 +13,6 @@ def _verify_platform():
         raise Exception(f'Platform {_platform} unsupported (not yet)')
 
 
-def _check(result):
-    if result != 0:
-        raise Exception("Failed to read output {name}")
-
-
 # readable True => json, False => binary output
 def run_project(name: str, readable: bool = True) -> str:
     if not project.have_project(name):
@@ -34,7 +29,7 @@ def run_project(name: str, readable: bool = True) -> str:
     rpt = os.path.join(os.path.join(dir, 'temp'), input + '.rpt')
     opt = os.path.join(os.path.join(dir, 'temp'), input + '.opt')
     command = f'{exe} {inp} {rpt} {opt}'
-    #print(command)
+
     result = os.system(command)
     if result != 0:
         raise Exception("Failed to run simulation for project {name}")
@@ -43,12 +38,14 @@ def run_project(name: str, readable: bool = True) -> str:
 
     handle = ctypes.c_void_p()
 
+    def _check(result):
+        if result != 0:
+            raise Exception(f'Failed to read output {name}')
+
     _check(_lib_output.ENR_init(ctypes.byref(handle)))
 
     _check(_lib_output.ENR_open(handle, ctypes.c_char_p(opt.encode())))
 
-    
-
     _check(_lib_output.ENR_close(ctypes.byref(handle)))
 
     return ''