Merge pull request #7 from Khushiyant/docs

docs: add env variable setup instructions

examples/smell_calculator.py

@@ -190,4 +190,4 @@ def __init__(self, real_part, imaginary_part):
         self.imaginary_part = imaginary_part
 
     def __str__(self):
-        return f"{self.real_part} + {self.imaginary_part}i"
+        return f"{self.real_part} + {self.imaginary_part}i"