How to solve Python's function parameter name non-standard error?

Python is a high-level programming language that can be used to develop various types of applications. In Python, function parameters are a very important language construct used to pass data to functions and perform specific operations. However, sometimes we encounter errors with nonstandard function parameter names, which can cause certain problems in development and debugging. This article explains how to resolve this issue.

1. Understanding function parameters

In Python, a function can define any number of parameters, including positional parameters and keyword parameters. Positional parameters refer to parameters of a function that are passed in the order they appear in the function definition, while keyword parameters refer to parameters of a function that are passed by specifying parameter names. For example, the following code defines a function that has two positional parameters and one keyword parameter:

def show_info(name, age, address=""):
    print("Name:", name)
    print("Age:", age)
    print("Address:", address)

When calling this function, parameters can be passed positionally or by specifying parameter names:

# 按照位置传递参数
show_info("Tom", 20, "Beijing")

# 通过指定参数名传递参数
show_info(name="Jack", age=30, address="Shanghai")

2. Normalized parameter names

Python’s function parameter names can use any legal identifier, including letters, numbers, underscores, and Unicode characters. However, in order to avoid errors with non-standard parameter names, we should follow some of the following rules:

• Use meaningful parameter names. Parameter names should reflect the purpose and meaning of the parameter, which can increase the readability and maintainability of the code.
• Avoid using Python keywords as parameter names. Python keywords are specific words that are reserved by the Python language and cannot be used as variable or function names. For example, parameter names should not be set to keywords such as class, def, if, etc.
• Avoid using abbreviations and abbreviations. Parameter names should use complete words or phrases to reduce confusion for code readers.
• Use lowercase letters and underscores whenever possible. Although Python is not sensitive to uppercase and lowercase letters, for consistency in coding style, we should use lowercase letters and underscores to name parameters.
• Use PEP 8 naming convention. The Python community has developed a set of naming conventions called PEP 8, which contains many naming conventions and best practices. We should use these conventions for naming function parameters whenever possible.

3. Correction of non-standard parameter names

Sometimes we may use non-standard parameter names in the code, which will cause Python to display unstandardized parameter names. Definition error. In order to solve this problem, we need to correct these non-standard parameter names. For example, suppose we use an unstandardized parameter name in a function call:

def show_info(name, age, address=""):
    print("Name:", name)
    print("Age:", age)
    print("Address:", address)

# 参数名未定义的错误
show_info(Name="Tom", Age=20)

Python will display an undefined parameter error because the parameter name should not use uppercase letters. In order to correct this error, we should use parameter names with lowercase letters:

# 更正不规范的参数名
show_info(name="Tom", age=20)

This way there will no longer be errors with non-standard parameter names.

In short, the correct use of function parameters is one of the important skills in Python programming. By standardizing parameter names and promptly correcting non-standard parameter names, we can avoid many errors and improve the readability and maintainability of the code.

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