diff --git a/Factorial of a number b/Factorial of a number
deleted file mode 100644
index a58fc51..0000000
--- a/Factorial of a number	
+++ /dev/null
@@ -1,7 +0,0 @@
-def factorial(n):
-    if n == 0:
-        return 1
-    else:
-        return n * factorial(n-1)
-n=int(input("Input a number to compute the factiorial : "))
-print(factorial(n))
diff --git a/machine learning basics/Readme.md b/machine learning basics/Readme.md
index bba9dc6..224aa1b 100644
--- a/machine learning basics/Readme.md	
+++ b/machine learning basics/Readme.md	
@@ -1,4 +1,6 @@
 # Machine Learning basics
+- Machine learning certification by stanford university (Coursera) (https://www.coursera.org/learn/machine-learning)
+- Intro to Machine Learning-Nano Degree by Udacity (https://www.udacity.com/course/intro-to-machine-learning-nanodegree--nd229?cjevent=b52f3b02e73a11e980f3015b0a180512)
 
 
 # Recommended Courses for Machine Learning 
@@ -20,3 +22,5 @@ https://www.udacity.com/course/intro-to-machine-learning-nanodegree--nd229
 - georgioupanayiotis
 - CheshtaK
 - Manavpreet Singh (https://github.com/ManavpreetSingh)
+- Lakshmikanth Rajamani (https://twitter.com/krlakshmikanth)
+- Ramesh Suthar (https://github.com/RameshSuthar)
diff --git a/python basics/Readme.md b/python basics/Readme.md
index 00174d2..f1150e7 100644
--- a/python basics/Readme.md	
+++ b/python basics/Readme.md	
@@ -24,15 +24,17 @@ Python Fundamentals
 - [Python for Everybody](https://www.youtube.com/watch?v=8DvywoWv6fI )
 - [Python Tutorials by Corey Schafer](https://www.youtube.com/watch?v=YYXdXT2l-Gg&list=PL-osiE80TeTt2d9bfVyTiXJA-UTHn6WwU)
 - [Learn Python by Nina Zakharenko](https://www.learnpython.dev/)
-
 - [Learning to program with Python 3 by sentdex](https://www.youtube.com/watch?v=eXBD2bB9-RA&list=PLQVvvaa0QuDeAams7fkdcwOGBpGdHpXln)
-
   [PythonProgramming.net](https://www.youtube.com/watch?v=oVp1vrfL_w4&list=PLQVvvaa0QuDe8XSftW-RAxdo6OmaeL85M)
   [Python Programming by ProgrammingKnowledge](https://www.youtube.com/watch?v=41qgdwd3zAg&list=PLS1QulWo1RIaJECMeUT4LFwJ-ghgoSH6n)
   [Python for beginners in just 6 hours](https://www.youtube.com/watch?v=_uQrJ0TkZlc)
   [Learn Python](https://www.learnpython.org/)
+- [Learning to program with Python 3 by sentdex](https://www.youtube.com/watch?v=eXBD2bB9-RA&list=PLQVvvaa0QuDeAams7fkdcwOGBpGdHpXln)
 
-
+  [PythonProgramming.net](https://www.youtube.com/watch?v=oVp1vrfL_w4&list=PLQVvvaa0QuDe8XSftW-RAxdo6OmaeL85M)
+  [Python Programming by ProgrammingKnowledge](https://www.youtube.com/watch?v=41qgdwd3zAg&list=PLS1QulWo1RIaJECMeUT4LFwJ-ghgoSH6n)
+  [Python for beginners in just 6 hours](https://www.youtube.com/watch?v=_uQrJ0TkZlc)
+  [Learn Python](https://www.learnpython.org/)
 - [ ] Feel free to add more resources under this section. It can be link to any youtube channel or any e-learning app or website.
 
 
diff --git a/python basics/string_manipulation.py b/python basics/string_manipulation.py
index 81e78d3..f0c23d5 100644
--- a/python basics/string_manipulation.py	
+++ b/python basics/string_manipulation.py	
@@ -1,6 +1,5 @@
 #String manipulation
 #Strings are "a list of characters", and here you can learn a bit of how to manipulate them.
-
 string = "hello, world!"
 
 #Capitalizes the first letter of the string.