Generate UUIDs in Python

import uuid

# UUID v4 (random) - most common
id = uuid.uuid4()
print(id)  # a1b2c3d4-e5f6-4a7b-8c9d-0e1f2a3b4c5d
print(str(id))  # string representation

# UUID v1 (time-based)
id1 = uuid.uuid1()

# UUID v5 (name-based, SHA-1)
namespace = uuid.NAMESPACE_DNS
id5 = uuid.uuid5(namespace, 'example.com')
# Always same output for same namespace+name

# UUID from string
id = uuid.UUID('a1b2c3d4-e5f6-4a7b-8c9d-0e1f2a3b4c5d')

# UUID properties
print(id.hex)      # a1b2c3d4e5f64a7b8c9d0e1f2a3b4c5d
print(id.bytes)    # bytes representation
print(id.int)      # integer representation
print(id.version)  # 4

# Generate multiple
ids = [str(uuid.uuid4()) for _ in range(5)]

# NIL UUID
nil = uuid.UUID(int=0)
print(nil)  # 00000000-0000-0000-0000-000000000000

# Validate (try parsing)
def is_valid_uuid(val):
    try:
        uuid.UUID(str(val))
        return True
    except ValueError:
        return False