fredzett

import numpy as np
from typing import Dict

dic = dict(header1=np.array((1,2,3,1,2,3,1,2,3)), 
                header2=np.array((1,9,3,4,4,5,6,7,4)), 
                header3=np.array((1,2,3,454,7,5,6,7,8))
                )
class Expr:
    
    def __init__(self) -> None: