final

calculate.py

@@ -11,15 +11,20 @@ def load_params(file="params.ini"):
     которым по умолчанию является params.ini '''
 
     global PARAMS
-    with  open(file, 'r', errors='ignore') as f:
-        lines = f.readlines()
-        for l in lines:
-            param = l.split('=')
-            param[1] = param[1].strip('\n')
+    try:
+        open(file, 'r', errors='ignore')
+    except FileNotFoundError: 
+        print("Такого файла с параметрами не существует")
+    else:
+        with  open(file, 'r', errors='ignore') as f:
+            lines = f.readlines()
+            for l in lines:
+                param = l.split('=')
+                param[1] = param[1].strip('\n')
 
-            if param[0] != 'dest':
-                param[1] = eval(param[1])
-            PARAMS[param[0]] = param[1]
+                if param[0] != 'dest':
+                    param[1] = eval(param[1])
+                PARAMS[param[0]] = param[1]
 
 def convert_precision(prec):
     ''''
@@ -132,7 +137,8 @@ class TestCalculator(unittest.TestCase):
 
         def test_precision(self):
             self.assertEqual(convert_precision(0.0000001), 7)
-            
+            self.assertEqual(convert_precision(0.001), 3)
+        
         def test_error(self):
             with self.assertRaises(Exception):
                 calculate(*(5,0), action="/", **PARAMS)