Autosave: 2024-11-01 16:51:35

neuron/3e9c8244-6ff9-4b0e-85f5-e82db8665849/Dictionaries_in_Python.md

@@ -120,5 +120,14 @@ print(seasons['Spring'][1])
 ('Mar', 'Apr', 'May')
 Apr
 """
+```
+
+## Merging two Dictionaries
+
+Two separate dictionaries can be merged into a single dictionary with shared
+properties with this shorthand:
+
+```python
+merged_dictionary = dictionary_one | dictionary_two
 
 ```

neuron/3e9c8244-6ff9-4b0e-85f5-e82db8665849/Lists_in_Python.md

@@ -140,7 +140,7 @@ print(my_list)  # Output will be [10, 20, 40, 50]
 ```
 
 > If the value is not found in the list,
-> ` remove()`` will raise a ValueError. To avoid this, you can check whether the value exists in the list before calling  `remove()`
+> `remove()`` will raise a ValueError. To avoid this, you can check whether the value exists in the list before calling `remove()`
 
 ### pop()
 
@@ -175,7 +175,7 @@ print(root_list)
 # ['John', [1, 43.5, 'Phoebe', True], ['apple', 'orange', 31], 'Denise']
 ```
 
-## Merging (flattening) lists
+## Merging lists
 
 ```py
 list1 = [1, 2, 3]
@@ -185,6 +185,23 @@ merged_list = list1 + list2
 print(merged_list)  # Output: [1, 2, 3, 4, 5, 6]
 ```
 
+## Flattening a two-dimensional list (matrix)
+
+Use [list comprehension](List_comprehension_in_Python.md) for each row in the
+matrix:
+
+```python
+ matrix = [
+    [9, 3, 8, 3],
+    [4, 5, 2, 8],
+    [6, 4, 3, 1],
+    [1, 0, 4, 5],
+]
+
+flat = [item for row in matrix for item in row]
+# [9, 3, 8, 3, 4, 5, 2, 8, 6, 4, 3, 1, 1, 0, 4, 5]
+```
+
 ## See also
 
 [Sorting lists in Python](Sorting_lists_in_Python.md)

neuron/3e9c8244-6ff9-4b0e-85f5-e82db8665849/index.md

@@ -13,20 +13,20 @@ computer science.
 
 ![not-by-ai-badge](static/not-by-ai-alternative--light.svg)
  
-**Build ID:** 22c4bb42-86c2-4906-9753-27655e15c1d9
+**Build ID:** 3e9c8244-6ff9-4b0e-85f5-e82db8665849
 
-**Published:** Wed 30 Oct 2024 13:34:38
+**Published:** Fri 01 Nov 2024 16:51:34
 
 ### Recent edits 
 
+- [[Lists_in_Python]] 
+- [[Dictionaries_in_Python]] 
 - [[Bell_System]] 
 - [[Bolt_Beranek_and_Newman]] 
 - [[4da22434_from_ARPANET_to_Internet]] 
 - [[3f1b9fe5_motivation_Berners_Lee]] 
 - [[4a3dc316_key_figures_ARPANET]] 
 - [[82f9c228_dissolution_of_ARPANET]] 
-- [[Fetch_decode_execute]] 
-- [[Secrets_or_env_vars_in_AWS]] 
 
 
 ### All notes (481) 

zk/Dictionaries_in_Python.md

@@ -120,5 +120,14 @@ print(seasons['Spring'][1])
 ('Mar', 'Apr', 'May')
 Apr
 """
+```
+
+## Merging two Dictionaries
+
+Two separate dictionaries can be merged into a single dictionary with shared
+properties with this shorthand:
+
+```python
+merged_dictionary = dictionary_one | dictionary_two
 
 ```

zk/Lists_in_Python.md

@@ -140,7 +140,7 @@ print(my_list)  # Output will be [10, 20, 40, 50]
 ```
 
 > If the value is not found in the list,
-> ` remove()`` will raise a ValueError. To avoid this, you can check whether the value exists in the list before calling  `remove()`
+> `remove()`` will raise a ValueError. To avoid this, you can check whether the value exists in the list before calling `remove()`
 
 ### pop()
 
@@ -175,7 +175,7 @@ print(root_list)
 # ['John', [1, 43.5, 'Phoebe', True], ['apple', 'orange', 31], 'Denise']
 ```
 
-## Merging (flattening) lists
+## Merging lists
 
 ```py
 list1 = [1, 2, 3]
@@ -185,6 +185,23 @@ merged_list = list1 + list2
 print(merged_list)  # Output: [1, 2, 3, 4, 5, 6]
 ```
 
+## Flattening a two-dimensional list (matrix)
+
+Use [list comprehension](List_comprehension_in_Python.md) for each row in the
+matrix:
+
+```python
+ matrix = [
+    [9, 3, 8, 3],
+    [4, 5, 2, 8],
+    [6, 4, 3, 1],
+    [1, 0, 4, 5],
+]
+
+flat = [item for row in matrix for item in row]
+# [9, 3, 8, 3, 4, 5, 2, 8, 6, 4, 3, 1, 1, 0, 4, 5]
+```
+
 ## See also
 
 [Sorting lists in Python](Sorting_lists_in_Python.md)