Add indentation section

Author: sanjarcode

1._Intro.txt

@@ -4,5 +4,3 @@ Creation-Date: 2021-03-15T19:32:42+05:30
 
 ====== 1. Intro ======
 Created Monday 15 March 2021
-
-Source: https://pycon.switowski.com/

1._Intro/1._Python_-_WH_questions.txt

@@ -5,7 +5,4 @@ Creation-Date: 2021-03-15T20:02:32+05:30
 ====== 1. Python - WH questions ======
 Created Monday 15 March 2021
 
-* Python is stricly indented and does not use {} as code-blocks.
-* Semicolons are not required.
-* Semicolons can be used to write multiple statements in one line. This is frowned upon, because it hampers readablity. This is purely cosmetic and doesn't change execution procedure.
-* Blocks statements have the same indentation, continually. A block in python is called a 'suite'.
+FIXME: add from Wikipedia Page

2._Learning_Python/A._Basic_-_no_OOP/1._Basic_constructs/1._Variables.txt

@@ -11,15 +11,13 @@ Created Saturday 17 October 2020
 * Python is dynamically typed(no need to specify type anywhere). Declarations and initalizations are done at the same time.
 * Has an automatic garbage-collector(no manual memory management required).
 
-=== Naming rules ===
+=== Variable Naming rules ===
 Same as C++
 * Symbols allowed - lowercase and uppercase english alphabets, digits(0-9) and the underscore(_).
 * Names cannot start with a digit
 
-**Basic Ops**
-* int(str, radix) returns the integer value.
-FIXME
-There are 3 kinds of variables in python:
+=== Types of variables ===
+There are 3 kinds of variables:
 1. Global variables
-2. Function Variables
+2. Function variables
 3. Class variables

2._Learning_Python/A._Basic_-_no_OOP/2._Indentation.txt

@@ -5,3 +5,7 @@ Creation-Date: 2020-05-19T17:11:12+05:30
 ====== 2. Indentation ======
 Created Tuesday 19 May 2020
 
+* Python is stricly indented and does not use {} as code-blocks.
+* Semicolons are not required.
+* Semicolons can be used to write multiple statements in one line. This is frowned upon, because it hampers readablity. This is purely cosmetic and doesn't change execution procedure.
+* Blocks statements have the same indentation, continually. A block in python is called a 'suite'.

2._Learning_Python/A._Basic_-_no_OOP/5._Dicts_and_Sets/2._Sets/1._Set_operations.txt

@@ -8,7 +8,7 @@ Created Wednesday 13 May 2020
 1. s1.union(s2) - same as s1 | s2
 2. s1.intersection - same as s1 & s2
 3. s1.difference(s2 - same as s1 - s2
-4. s1.symmetric_difference(s2) - same as (s1 U s2)  - (s1 intersection s2)
+4. s1.symmetric_difference(s2) - exclusive elements.
 
 {{{code: lang="python3" linenumbers="False"
 s1.union(s2)
@@ -18,9 +18,9 @@ s1.intersection(s2)
 s1 & s2 # and
 
 s1.difference(s2)
-s1 - s2	# minus
+s1 - s2	# usual minus
 
-s1.symmetric_difference(s2) - union of exclusive elements of A and B
+s1.symmetric_difference(s2) - exclusive elements of A and B
 s1 ^ s2 # exclusive - XOR - ^
 
 s1.issubset(s2)
@@ -34,9 +34,10 @@ s1>=s2
 # not no camelCase in case of any ops
 }}}
 
-#
+
+=== About ''set'' ops ===
 * All return a set.
-* They are unordered. ,,
+* They are unordered.
 * + is not a valid operator in sets, just like in mathematics.
 * Use the full keyboard, this helps in reading code.