From 601f856183847399edc5c748121f4fe37ae1f7c2 Mon Sep 17 00:00:00 2001
From: sahil afrid farookhi <msafarookhi@gmail.com>
Date: Wed, 15 Oct 2025 17:25:45 -0500
Subject: [PATCH 1/2] add appendleft term

---
 .../deque/terms/appendleft/appendleft.md      | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 content/python/concepts/deque/terms/appendleft/appendleft.md

diff --git a/content/python/concepts/deque/terms/appendleft/appendleft.md b/content/python/concepts/deque/terms/appendleft/appendleft.md
new file mode 100644
index 00000000000..b8a08815fb9
--- /dev/null
+++ b/content/python/concepts/deque/terms/appendleft/appendleft.md
@@ -0,0 +1,50 @@
+---
+Title: 'appendleft'
+Description: 'Adds an element to the left side (beginning) of a `collections.deque` object.'
+Subjects:
+  - 'Computer Science'
+Tags:
+  - 'Collections'
+  - 'Data Structures'
+  - 'Deques'
+  - 'Methods'
+  - 'Python'
+CatalogContent:
+  - 'learn-python-3'
+---
+
+The **`appendleft()`** method adds an element to the left side (the beginning) of a `collections.deque` object. This is useful for managing elements in a queue-like structure, where items are added and removed from opposite ends.
+
+## Syntax
+
+```py
+from collections import deque
+
+my_deque.appendleft(element) # element: The item to add to the left side of the deque.
+```
+
+## Example 1: How to add elements to the left side of a deque using appendleft()
+
+```py
+from collections import deque
+
+# Create a deque
+my_deque = deque([1, 2, 3])
+print(f"Initial deque: {my_deque}")
+
+# Append an element to the left
+my_deque.appendleft(0)
+print(f"Deque after appendleft(0): {my_deque}")
+
+# Append another element
+my_deque.appendleft(-1)
+print(f"Deque after appendleft(-1): {my_deque}")
+```
+
+The output of the example 1:
+
+```shell
+Initial deque: deque([1, 2, 3])
+Deque after appendleft(0): deque([0, 1, 2, 3])
+Deque after appendleft(-1): deque([-1, 0, 1, 2, 3])
+```

From 7c854a5da54c60f3c68b97c355d348226d57fb74 Mon Sep 17 00:00:00 2001
From: Mamta Wardhani <mamta.wardhani@gmail.com>
Date: Fri, 17 Oct 2025 16:20:29 +0530
Subject: [PATCH 2/2] added codebyte example

---
 .../deque/terms/appendleft/appendleft.md      | 51 +++++++++++++++----
 1 file changed, 42 insertions(+), 9 deletions(-)

diff --git a/content/python/concepts/deque/terms/appendleft/appendleft.md b/content/python/concepts/deque/terms/appendleft/appendleft.md
index b8a08815fb9..465c26fee83 100644
--- a/content/python/concepts/deque/terms/appendleft/appendleft.md
+++ b/content/python/concepts/deque/terms/appendleft/appendleft.md
@@ -1,8 +1,9 @@
 ---
-Title: 'appendleft'
-Description: 'Adds an element to the left side (beginning) of a `collections.deque` object.'
+Title: 'appendleft()'
+Description: 'Adds an element to the left end (front) of the deque.'
 Subjects:
   - 'Computer Science'
+  - 'Data Science'
 Tags:
   - 'Collections'
   - 'Data Structures'
@@ -11,19 +12,28 @@ Tags:
   - 'Python'
 CatalogContent:
   - 'learn-python-3'
+  - 'paths/computer-science'
 ---
 
-The **`appendleft()`** method adds an element to the left side (the beginning) of a `collections.deque` object. This is useful for managing elements in a queue-like structure, where items are added and removed from opposite ends.
+The **`appendleft()`** method adds an element to the left end (front) of a `collections.deque` object. This is useful for managing elements in a queue-like structure, where items are added and removed from opposite ends.
 
 ## Syntax
 
-```py
-from collections import deque
-
-my_deque.appendleft(element) # element: The item to add to the left side of the deque.
+```pseudo
+deque.appendleft(element)
 ```
 
-## Example 1: How to add elements to the left side of a deque using appendleft()
+**Parameters:**
+
+- `element`: The item to add to the left end (front) of the deque.
+
+**Return value:**
+
+- `None`. The deque is modified in place.
+
+## Example: Adding elements to the left side of a deque using `appendleft()`
+
+In this example, `appendleft()` adds elements to the left end of a deque, demonstrating how items are prepended to the front:
 
 ```py
 from collections import deque
@@ -41,10 +51,33 @@ my_deque.appendleft(-1)
 print(f"Deque after appendleft(-1): {my_deque}")
 ```
 
-The output of the example 1:
+The output of this code is:
 
 ```shell
 Initial deque: deque([1, 2, 3])
 Deque after appendleft(0): deque([0, 1, 2, 3])
 Deque after appendleft(-1): deque([-1, 0, 1, 2, 3])
 ```
+
+## Codebyte Example: Using `appendleft()` for Dynamic Queue Operations
+
+In this example, `appendleft()` is used to add elements to the front of a deque, simulating dynamic queue operations where new items arrive at the front:
+
+```codebyte/python
+from collections import deque
+
+# Initialize a deque with numbers
+numbers = deque([10, 20, 30])
+print("Original deque:", numbers)
+
+# Add elements dynamically to the left
+numbers.appendleft(5)
+numbers.appendleft(0)
+
+print("Deque after dynamic prepend operations:", numbers)
+
+# Access elements to verify positions
+print("First element:", numbers[0])
+print("Second element:", numbers[1])
+print("Last element:", numbers[-1])
+```