Python has a vast number of commands, functions, modules, and libraries. It is not feasible to list all Python commands in a single response. However, I can provide you with an overview of various categories of Python commands:
| Category | Commands |
|---|---|
| Built-in Functions | print(), input(), len(), range(), type(), int(), str(), float(), list(), dict(), etc. |
| Control Flow Statements | if, elif, else, for, while, break, continue, pass, etc. |
| Data Structures | Lists: [], Tuples: (), Sets: {}, Dictionaries: {}, etc. |
| File I/O | open(), read(), write(), close(), seek(), tell(), etc. |
| Modules and Packages | math, random, datetime, os, json, csv, etc. |
| Object-Oriented Programming (OOP) | class, def, self, inheritance, encapsulation, polymorphism, etc. |
| Exception Handling | try, except, finally, raise, assert, etc. |
Here are some commonly used Python commands:
Print: Outputs text or variables to the console.
print("Hello, World!")
Variables: Stores values or data.
x = 5
Input: Accepts user input from the console.
name = input("Enter your name: ")
If statement: Executes code based on a condition.
if x > 0:
print("x is positive")
else:
print("x is non-positive")
For loop: Iterates over a sequence of elements.
for i in range(1, 5):
print(i)
While loop: Repeatedly executes code as long as a condition is true.
i = 0
while i < 5:
print(i)
i += 1
Lists: Ordered collections of items.
fruits = ["apple", "banana", "orange"]
Dictionaries: Stores key-value pairs.
student = {"name": "John", "age": 20, "grade": "A"}
Functions: Blocks of reusable code.
def greet(name):
print("Hello, " + name + "!")
Classes: Blueprints for creating objects with properties and methods.
class Person:
def __init__(self, name, age):
self.name = name
self.age = age
def greet(self):
print("Hello, my name is " + self.name)
All Python commands example
Simple example code.
# Print statement
print("Hello, World!")
# Variable assignment
x = 5
name = "John"
# Input statement
name = input("Enter your name: ")
# If statement
if x > 0:
print("x is positive")
else:
print("x is non-positive")
# For loop
for i in range(1, 5):
print(i)
# While loop
i = 0
while i < 5:
print(i)
i += 1
# List
fruits = ["apple", "banana", "orange"]
# Dictionary
student = {"name": "John", "age": 20, "grade": "A"}
# Function
def greet(name):
print("Hello, " + name + "!")
greet("Alice") # Function call
# Class
class Person:
def __init__(self, name, age):
self.name = name
self.age = age
def greet(self):
print("Hello, my name is " + self.name)
person = Person("Bob", 25) # Object instantiation
person.greet() # Method call
Output:
Do comment if you have any doubts or suggestions on this Python basic topic.
Note: IDE: PyCharm 2021.3.3 (Community Edition)
Windows 10
Python 3.10.1
All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.