class GradeMixin:
    A_GRADE = 'A'
    B_GRADE = 'B'
    C_GRADE = 'C'
    D_GRADE = 'D'
    GRADES = (
        (A_GRADE, 'Excellent'),
        (B_GRADE, 'Good'),
        (C_GRADE, 'Fair'),
        (D_GRADE, 'Poor'),
    )

f84b919f6b1b54ad2d9026e4c6aab54ffc73f573
<mask token>

class GradeMixin:
    <mask token>
    <mask token>
    <mask token>
    <mask token>
    <mask token>

class GradeMixin:
    A_GRADE = 'A'
    B_GRADE = 'B'
    C_GRADE = 'C'
    D_GRADE = 'D'
    GRADES = (A_GRADE, 'Excellent'), (B_GRADE, 'Good'), (C_GRADE, 'Fair'), (
        D_GRADE, 'Poor')

class GradeMixin:
    A_GRADE = 'A'
    B_GRADE = 'B'
    C_GRADE = 'C'
    D_GRADE = 'D'
    GRADES = (
        (A_GRADE, 'Excellent'),
        (B_GRADE, 'Good'),
        (C_GRADE, 'Fair'),
        (D_GRADE, 'Poor'),
    )
