The error message “positional arguments must occur before named arguments” suggests that you have a function or method call where there are both positional arguments (arguments supplied by their position) and named arguments (arguments supplied with their corresponding parameter names). However, in Python, all positional arguments must be specified before any named arguments.
Here’s an example to illustrate this issue:
def example_function(a, b, c=0, d=0):
print(a, b, c, d)
# Correct usage
example_function(1, 2, c=3, d=4) # Output: 1 2 3 4
# Incorrect usage
example_function(c=3, d=4, 1, 2) # Error: positional arguments must occur before named arguments
In the example, the function example_function
has two positional arguments (a
and b
) followed by two named arguments (c
and d
). When calling the function, the correct order is to provide the positional arguments first, followed by the named arguments. If you provide named arguments before all positional arguments, you will encounter the error mentioned.