We have a file testdata.csv:

sep=,
field_a,field_b,field_c
10.0,20.0,30.0
1.0,2.0,3.0

We want to read this file into a frozen dataclass with slots, but the dataclass should have field names from the csv file.

This can be done using make_dataclass.

C = make_dataclass('MyClass',
                   [('field_a', float),
                    ('field_b', float),
                    ('field_c', float),]

is the same as

@dataclass
class C:
    field_a: float
    field_b: float
    field_c: float

The code shows how to do this, sanitizing field names, and typing the dataclass.