moved the import command to the top of the file and added docstrings to the methods

calculator.py

@@ -1,12 +1,22 @@
+from math import log
 
 class Calculator():
-    from math import log
+    """Calculator class for the Intermediate Python
+    class led by Ed Fine from Pluralsight. This has
+    basic calculator functions including keeping a running
+    total.
+    """
 
     def __init__(self):
         self.total = 0.0
         self.actions = []
     
     def add(self, val1, val2=None):
+        """Add two numbers together and prints the result
+        then adds the sum to the running total. With only
+        one number provided, just add that to the running
+        total.
+        """
         running_total = self.total
         
         if val2:
@@ -21,6 +31,11 @@ class Calculator():
         self.actions.append(f" = {self.total}")
     
     def sub(self, val1, val2=None):
+        """Subtracts val2 from val1 and prints the result
+        then subtracts the difference from the running total.
+        With only one number provided, just subtract that to
+        the running total.
+        """
         running_total = self.total
         
         if val2:
@@ -35,6 +50,11 @@ class Calculator():
         self.actions.append(f" = {self.total}")
     
     def mult(self, val1, val2=None):
+        """Multiplies the new values and prints the result
+        then multiplies the product to the running total.
+        With only one number provided, just mulitply the
+        running total with the lone value.
+        """
        running_total = self.total
         
         if val2:
@@ -49,6 +69,11 @@ class Calculator():
         self.actions.append(f" = {self.total}")
     
     def div(self, val1, val2=None):
+        """Divides val1 by val2 and prints the result
+        then divides the running total by the quotient.
+        With only one number provided, the running total
+        will be divided by the value.
+        """
         running_total = self.total
         
         if val2:
@@ -63,6 +88,11 @@ class Calculator():
         self.actions.append(f" = {self.total}")
     
     def pow(self, val1, val2=None):
+        """Raises val1 to the power of val2 and prints
+        the result then raises the running total by the
+        result. With only one number provided, just
+        raise the running total by the lone value.
+        """
         running_total = self.total
         
         if val2:
@@ -77,6 +107,9 @@ class Calculator():
         self.actions.append(f" = {self.total}")
      
     def log(self, val):
+        """Prints the logarithm of the value. This
+        does not affect the running total.
+        """
         print(log(val))
         self.actions.append(f"log({val})")
         
@@ -84,13 +117,19 @@ class Calculator():
         # self.actions.append(f" = {self.total}")
  
     def showcalc(self):
+        """Prints out the running history since the
+        last all clear command.
+        """
         for action in self.actions:
             print(action)
     
     def total(self):
+        """Prints the running total."""
         return(self.total)
     
     def ac(self):
+        """Resets the running total to 0.0 and
+        empties the history."""
         self.total = 0.0
         self.actions = []