What are the best practices for choosing variable names in Python?

• Use descriptive names that reflect the purpose of the variable.
• The length of the name should be proportional to its context (short names for temporary variables, longer for global ones).
• Use lowercase with snake_case for regular variables and functions.
• Use uppercase with snake_case (UPPER_SNAKE_CASE) for constants.
• Use CamelCase (UpperCamelCase) for class names.
• Do not use Python reserved words.
• Avoid single-letter names, except for obvious cases (i for loops).
• Be consistent in naming throughout the project.
• Use prefixes if it improves readability (e.g., is_active, has_items).
• Avoid using overly long names that hinder readability.

# Good names
user_name = "Alice"
total_count = 100
is_valid = True
MAX_RETRIES = 5

class UserProfile:
    pass

# Bad names
x = "Alice" # Not obvious that this is a username
tc = 100    # Not clear what this counter is
valid = True # Better to add a prefix 'is_'
retry_count = 5 # Not a constant