Jupyter Notebook start

ONEatm760torr — Thu, 25 Dec 2025 16:30:55 +0000

What is Jupyter Notebook?
Interactive coding environment for Python (and other languages like R, Julia via kernels).

Modes in Jupyter
Command Mode - used to control cells, Esc to enter
Edit Mode - used to type code or text, Enter to enter

Shortcut Action
Shift + Enter Run cell & go to next
Ctrl + Enter Run cell & stay
Alt + Enter Run & insert new cell
A Insert cell above
B Insert cell below
Y Convert to Code
D + D Delete cell
C Copy cell
X Cut cell
V Paste below
Shift + V Paste above
Ctrl + / Comment / Uncomment
Tab Auto-complete
Shift + Tab Function help
Ctrl + Z Undo
Ctrl + Y Redo
M Convert to Markdown

Use .ipynb

Python important points

ONEatm760torr — Thu, 25 Dec 2025 15:09:51 +0000

Var type is decided at runtime(Dynamic Typing)
id() - The id() function returns a unique id for the specified object. All objects in Python have their own unique id.
Immutable Objects - int, float, str, tuple, Mutable Objects - list, dict, set
Python has no true constants.
input() returns string
Multiple Inputs in One Line, a, b = input().split()
with open("data.txt", "r") as f:
data = f.read()`
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Jupyter Notebook start

Python important points