GOC Python Calculator

Problem Statement 3/README.md

@@ -1,10 +1 @@
-# Problem Statement-3.
-
-
-***
-### Make a calculator with GUI
-
-
-
-***
-
+# calcalutor in python for GOC Hack2skill

Problem Statement 3/calculator.py

@@ -0,0 +1,95 @@
+import sys
+import math
+## Imported math library to run sin(), cos(), tan() and other such functions in the calculator
+
+
+
+
+def calc(term):
+    """
+        input: term of type str
+        output: returns the result of the computed term.
+        purpose: This function is the actual calculator and the heart of the application
+    """
+
+    # This part is for reading and converting arithmetic terms.
+    term = term.replace(' ', '')
+    term = term.replace('^', '**')
+    term = term.replace('=', '')
+    term = term.replace('?', '')
+    term = term.replace('%', '/100.00')
+    term = term.replace('rad', 'radians')
+    term = term.replace('mod', '%')
+    term = term.replace('aval', 'abs')
+
+    functions = ['sin', 'cos', 'tan', 'pow', 'cosh', 'sinh', 'tanh', 'sqrt', 'pi', 'radians', 'e']
+
+    # This part is for reading and converting function expressions.
+    term = term.lower()
+
+    for func in functions:
+        if func in term:
+            withmath = 'math.' + func
+            term = term.replace(func, withmath)
+
+    try:
+
+        # here goes the actual evaluating.
+         term = eval(term)
+
+    # here goes to the error cases.
+    except ZeroDivisionError:
+
+        print("Can't divide by 0.  Please try again.")
+
+    except NameError:
+
+        print('Invalid input.  Please try again')
+
+    except AttributeError:
+
+        print('Please check usage method and try again.')
+    except TypeError:
+        print("please enter inputs of correct datatype ")
+
+    except Exception:
+        print("Wrong operator")
+
+    return term
+
+
+def result(term):
+    """
+        input:  term of type str
+        output: none
+        purpose: passes the argument to the function calc(...) and
+                prints the result onto console.
+    """
+    print("\n" + str(calc(term)))
+
+
+def main():
+    """
+        main-program
+        purpose: handles user input and prints
+                 information to the console.
+    """
+
+
+    if sys.version_info.major >= 3:
+        while True:
+            k = input("\nWhat is ")
+            if k == 'quit':
+                break
+            result(k)
+
+    else:
+        while True:
+            k = raw_input("\nWhat is ")
+            if k == 'quit':
+                break
+            result(k)
+
+
+if __name__ == '__main__':
+    main()