This is a quick-reference guide to Python for beginners and experienced developers who want a fast refresher.

Here’s a cleaned-up and slightly enhanced version of your Python cheat sheet with a bit more clarity and structure for easier reference:

Python Data Types & Operations Cheat Sheet

1. Data Types

Primitive Types

• int → integers (5, -10)
• float → floating-point numbers (3.14, -0.5)
• str → strings ("hello")
• bool → boolean (True, False)

Complex Types

• list → ordered, mutable collection ([1, 2, 3])
• tuple → ordered, immutable collection ((1, 2, 3))
• dict → key-value pairs ({"a": 1, "b": 2})
• set → unordered, unique elements ({1, 2, 3})

2. Collections: list, dict, set Operations

Add Elements

Delete Elements

Access Elements

• Indexing: mylist[0]
• Slicing: mylist[start:end]
• Stepping: mylist[start:end:step]

Search / Query

• list.index(item) → get first occurrence index
• list.count(item) → count occurrences
• item in list → membership check

Other Useful Methods

• clear() → remove all elements
• len() → length of collection
• min(), max() → minimum/maximum values

3. String Operations

• str.count(substring) → count occurrences
• str.find(substring) → index of first occurrence (-1 if not found)
• str.strip() → remove leading/trailing whitespace
• str.split(delimiter) → split string into a list

4. Math Operations

• min(iterable) / max(iterable)
• pow(x, y) → x to the power y
• abs(x) → absolute value
• math.floor(x) → largest integer ≤ x (requires import math)

Conditions

If / Else Syntax

if condition1:
    # do something
elif condition2:
    # do something else
else:
    # fallback action

Ternary Operator

status = "Adult" if age >= 18 else "Minor"

Equivalent in Other Languages

status = age >= 18 ? "Adult" : "Minor";

Loops

Common For-Loop Patterns

# Iterate over values
for value in values:
    ...

# Index and value
for index, value in enumerate(values):
    ...

# Keys only
for key in my_dict:
    ...

# Keys and values
for key, value in my_dict.items():
    ...

# Range loop
for i in range(5):
    ...

Object-Oriented Programming (OOP)

Class Definition

class Person:
    def __init__(self, name):
        self.name = name

    def greet(self):
        return f"Hello, {self.name}"

This guide covers the essentials. For deeper learning, explore Python’s official documentation, or practice with small projects and challenges.