Python >> Tips and Tricks 4

# Loop all items and index
mylist = ["a", "b", "c"]

for i, item in enumerate(mylist):
    print(i, item)

# Loop all items and index
mytuple = ("a", "b", "c")

for i, item in enumerate(mytuple):
    print(i, item)

# Loop all items and index
mydict = {"a": 1, "b": 2, "c": 3}

for i, item in enumerate(mydict):
    print(i, item)

# Loop all items and index
myset = {"a", "b", "c"}

for i, item in enumerate(myset):
    print(i, item)

# Define enum
from enum import Enum

class Color(Enum):
    RED = 1
    GREEN = 2
    BLUE = 3

# Use enum
print(Color.RED.name)
print(Color.RED.value)

# Compare enum
my_color = Color.RED

if my_color == Color.RED:
    print("My color is RED")
else:
    print("My color is not RED")

if my_color == Color.BLUE:
    print("My color is BLUE")
else:
    print("My color is not BLUE")

# Loop all enums
for color in Color:
    print(color)

# Switch case
my_lang = 'python'

match my_lang:
    case "python":
        print("Python")
    case "java":
        print("Java")
    case "c++":
        print("C++")
    case "c#":
        print("C#")
    case "javascript":
        print("Javascript")
    case "go":
        print("Go")
    case _:
        print("Unknown")

# Encode base64
import base64

my_string = "Hello World"

my_base64 = base64.b64encode(my_string.encode())

print(my_base64)

# Decode base64
import base64

my_base64 = "SGVsbG8gV29ybGQ="

my_string = base64.b64decode(my_base64)

print(my_string.decode("utf-8"))

# Convert string to bytes
my_string = "Hello World"

my_bytes = bytes(my_string, "utf-8")

print(my_bytes)

# Convert bytes to string
my_bytes = b"Hello World"

my_string = my_bytes.decode("utf-8")

print(my_string)

# Convert bytes to JSON
import json

my_bytes = b'{"name": "John", "age": 30}'

print(json.loads(my_bytes))

# Convert bytes to dict
import ast

my_bytes = b'{"name": "John", "age": 30}'
dict_str = my_bytes.decode("utf-8")
print(ast.literal_eval(dict_str))

# Create bytearray
my_bytearray = bytearray(b"Hello World")
# OR
my_bytearray = bytearray("Hello World", "utf-8")

print(my_bytearray)

# bytearray to string
my_bytearray = bytearray(b"Hello World")

print(my_bytearray.decode("utf-8"))

# bytearray to JSON
import json

my_bytearray = bytearray(b'{"name": "John", "age": 30}')

print(json.loads(my_bytearray))

# Difference between bytes and bytearray
my_bytes = b"Hello World"
my_bytearray = bytearray(b"Hello World")

print(my_bytes == my_bytearray)