second commit

Basic/wiki.txt

@@ -29,3 +29,65 @@
         python -m venv <environment-folder-name>
         source .venv/bin/activate
         python -m pip install --upgrade pip setuptools wheel
+
+-> Referencing the list and copying the list:
+
+    for example:
+
+    amazon_cart = [
+        'notebooks',
+        'sunglasses',
+        'toys',
+        'grapes'
+    ]
+
+    amazon_cart[0] = 'laptop'
+    new_cart_2 = amazon_cart[:] # Copying the list
+                               # As list slicing creates a new
+                                # list
+
+    new_cart_1 = amazon_cart  # Referencing the list 
+
+
+    print(new_cart_1)
+    print(new_cart_2)
+    print(amazon_cart)
+
+-> Sorted function and sort method:
+
+    Sorted function creates a new list.
+
+    sort method do the sorting inplace in the list.
+
+-> List unpacking:
+
+    a,b,c = [1,2,3]
+
+    #a = 1 , b = 2 , c = 3
+
+    a, b, c, *other, d = [1, 2, 3, 4, 5, 6, 7]
+
+    #a = 1, b = 2, c = 3, other = [4,5,6], d = 7
+
+
+-> Dictionary key:
+
+    Dictionary key need to be immutable i.e. value of key shouldn't be
+    modified in any case.
+
+    The key also has to unique. If the same key which has been defined
+    is used again then the key with the new assigned value will override
+    the old value and access the value memory with that same key will
+    provide the new overrided value instead of previous value.
+    Hence, key of Dictionary should be unique
+
+-> list and tuple:
+
+    list are mutable but tuple are immutable
+
+-> using keyword and using methods:
+
+    using keyword to access anything which may not exist 
+    might result in error, but to avoid that we can use
+    methods instead of keyword for accessing any value
+    and avoiding error.