If you’re a Python programmer, you’ve probably come across the “SyntaxError: non-default argument follows default argument” error before. This error happens when you attempt to characterize a function with a default value for an argument and then attempt to describe another argument after it without a default value. In this blog post, we’ll take a look at what this error means and how you can solve it. We’ll also provide some tips on how to prevent it from happening in the future.
What is the “SyntaxError: non-default argument follows default argument” Error?
This error occurs when you try to describe a function with a default value for an argument and then try to describe another argument after it without a default value.
For example, let’s say we have the following code:
def my_func(a=1, b):
print(a+b)
If we try to run this code, we’ll get the following error:SyntaxError: non-default argument follows default argument. The reason this happens is that Python expects all of the arguments that come after a default argument to also have default values. In our example above, we’re trying to define an argument (b) without a default value, but since we’ve already defined the default value for the previous argument (a), Python doesn’t know what to do.
How Do You Solve the “SyntaxError?
There are a few ways to work-out the “SyntaxError syntaxerror non-default argument follows default argument in Python” error.
One solution is to simply move the non-default argument after the default argument in the function definition. This will ensure that all of the arguments are correctly ordered.
Another solution is to use keyword-only arguments, which are specified after the *args parameter in the function definition. This will allow you to specify the correct order of arguments regardless of where they appear in the function call.
Finally, you can also use default values for arguments, which will be used if no value is provided when the function is called. This can be helpful if you want to ensure that all of the arguments are correctly specified. By using one of these solutions, you should be able to work-it the “SyntaxError syntaxerror non-default argument follows default argument in Python” error.
Steps to prevent the error
When defining a function with default variables, make sure all the parameters after the first default parameter also have default values.
- If you’re not using default variables, put any parameters that have default values at the end of the list.
- Make sure you understand how Python’s interpreter works and what it expects when it sees a function with default parameters. This will help you avoid this error in the future.
Conclusion
In this blog post, we looked at the “SyntaxError:non-default argument follows default argument” error in Python. We covered what this error means and how you can solve it. Finally, w provided some tips on how to prevent it from happening in the future. By following these tips, you should be able to avoid this error in your own code.