Update Lecture-1-Introduction-to-Python-Programming.ipynb

a minor typo.

Author: sumitrao

Lecture-1-Introduction-to-Python-Programming.ipynb

@@ -490,7 +490,7 @@
      "source": [
       "Variable names in Python can contain alphanumerical characters `a-z`, `A-Z`, `0-9` and some special characters such as `_`. Normal variable names must start with a letter. \n",
       "\n",
-      "By convension, variable names start with a lower-case letter, and Class names start with a capital letter. \n",
+      "By convention, variable names start with a lower-case letter, and Class names start with a capital letter. \n",
       "\n",
       "In addition, there are a number of Python keywords that cannot be used as variable names. These keywords are:\n",
       "\n",
@@ -3834,4 +3834,4 @@
    "metadata": {}
   }
  ]
-}
+}