In this Python tutorial, learn the basics of Python variables, and the difference between local and global variables. Also, learn about global keywords used inside the functions in Python. 1. Python Variable Naming Convention While Python is flexible with variable names, there are a few rules an...
However, this is just a naming convention and doesn’t prevent developers from assigning new values to your constant. So, you need to be careful and never write code that changes the values of constants. To illustrate how to use constants instead of using global variables, say that you have...
Because exceptions should be classes, the class naming convention applies here. However, you should use the suffix “Error” on your exception names (if the exception actually is an error). Global Variable Names (Let’s hope that these variables are meant for use inside one module only.) The...
Classes for internal use have a leading underscore in addition. Exception Names Because exceptions should be classes, the class naming convention applies here. However, you should use the suffix "Error" on your exception names (if the exception actually is an error). Global Variable Names (Let'...
Because exceptions should be classes, the class naming convention applies here.However, you should use the suffix "Error" on your exception names (if the exception actually is an error). 异常:因为异常也是一个类,所以遵守类的命名规则。此外,如果异常实际上指代一个错误的话,应该使用“Error”做后缀 ...
8. Prescriptive: Naming Conventions 8.1 Names to Avoid 8.2 ASCII Compatibility 8.3 Package and Module Names 8.4 Class Names 8.5 Type Variable Names 8.6 Exception Names 8.7 Global Variable Names 8.8 Function and Variable Names 8.9 Function and Method Arguments ...
Good Variable Naming Practices Choose meaningful names, such as roll_no, which is clearer than rn. Avoid unnecessarily long variable names (e.g., Roll_no_of_a_student is too long). Be consistent in your naming convention: roll_no or RollNo, but not both. ...
Public and Non-Public Variable Names A widely used naming convention for variables in Python is to use a leading underscore when you need to communicate that a given variable is what Python defines as non-public. A non-public variable is a variable that shouldn’t be used outside its defini...
A label associated with a variable, a class attribute or a function parameter or return value, used by convention as a type hint. Annotations of local variables cannot be accessed at runtime, but annotations of global variables, class attributes, and functions are stored in the __annotations_...
小驼峰命名法:第一个单词首字母小写,后续单词首字母大写,例如:myVariableName。 下划线命名法:单词间用下划线分隔,例如:my_variable_name。 在实际编程过程中,选择合适的命名方式可以让代码更加清晰明了。例如,在一个电子商务系统中,定义一个变量存储用户的购物车列表,可以使用下划线命名法user_cart_items,这样变量名...