Variable Names in Python

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Just like other programming languages, python has its own rules for naming variables.
A valid python variable name must starts with an alphabet or underscore. Allowed characters are letters underscore and numbers(0-9). Also variable names are case sensitive, hence x and X are two different variables in python.
Few valid variable names are:

• _price
• weight_in_kg
• product_3

Few invalid variable names are:

• 1_account
• product#2
• quantity.kg