如何将十进制字符串值转换为数字？

有一个包含以下类型数据的文本文件：

    -7.271467826427747 17.84
    -7.238717596285217 17.83
    -7.203784017466519 17.82
    -7.171033787323988 17.81
    -7.138283557181459 17.80
    -7.103349978362760 17.79
    -7.068416399544062 17.78
    -7.033482820725363 17.77
    -6.998549241906665 17.76
    -6.961432314411798 17.75
    -6.924315386916930 17.74
    -6.889381808098232 17.73
    -6.852264880603365 17.72
    -6.812964604432329 17.71
    -6.775847676937462 17.70
    -6.738730749442595 17.69
    -6.699430473271558 17.68
    -6.660130197100525 17.67
    -6.618646572253319 17.66
    -6.577162947406114 17.65
    -6.537862671235079 17.64
    -6.496379046387874 17.63
    -6.452712072864502 17.62
    -6.409045099341129 17.61
    -6.365378125817755 17.60

我正在尝试将此文件转换为数组：

import numpy as np

_overall_survival = open('_overall_survival.txt').read().splitlines()
mas = np.array([line.split() for line in _overall_survival[0:]], float, order='F')

print(mas)

在输出中我们得到：

    [[-39.16145859 81.01]
     [-39.81064093 81.02]
     [-40.02431799 81.03]
     ...
     [-2.39123878 17.24]
     [-2.45739627 17.23]
     [-2.5248678 17.22]]

原则上它是有效的，但float它不能提供小数点后数字传输的准确性，这一点很重要。

我尝试使用Decimal：

from decimal import *
import numpy as np

_overall_survival = open('_overall_survival.txt').read().splitlines()
mas = np.array([line.split() for line in _overall_survival[0:]], Decimal, order='F')

print(mas)

在输出中我们得到：

    [['-39.161458590547106' '81.01']
     ['-39.810640930261251''81.02']
     ['-40.024317987368960''81.03']
     ...
     ['-2.391238778978993''17.24']
     ['-2.457396265486048''17.23']
     ['-2.524867804437093''17.22']]

在这种情况下，数组显示所有小数位，但这是字符串数据，仍然需要以某种方式转换为数字数据。

问题：如何Decimal在保持精度的同时获取数字而不是字符串？

添加：

根据CrazyElf 的Stanislav Volodarskiy的建议，Vitalizzare成功组建了该程序的工作原型。

import tkinter as tk
import numpy as np
from tkinter import ttk

with open('_overall_survival.txt') as f:
    array = np.array([list(map(float, line.split())) for line in f])
    with ((np.printoptions(precision=15))):
        mas = array


# ENGINE
# region
def calc():
    with ((np.printoptions(precision=15))):
        result = float((-0.02144927 * float(entry_a.get())
                        ) + (-0.04948455 * float(entry_b.get())
                             ) + 0.50824824)

        row = mas[np.abs(mas[:, 0] - result).argmin()]
        min_row = float(mas[np.abs(mas[:, 0]).argmin()][0])
        max_row = float(mas[np.abs(mas[:, 0]).argmax()][0])

        if min_row >= result >= max_row:
            score['text'] = mas[np.where(mas == row)][1]
            info['text'] = (f'Расчет: {result}\n'
                            f'ТОЧНОГО СОВПАДЕНИЯ НЕТ!\n'
                            f'Ближайшее значение: '
                            f'{mas[np.where(mas == row)][0]}\n'
                            f'Связанное значение: '
                            f'{mas[np.where(mas == row)][1]}')
        elif result < max_row:
            score['text'] = mas[np.where(mas == row)][1]
            info['text'] = (f'Расчет: {result}\n'
                            f'СОВПАДЕНИЙ НЕТ!\n'
                            f'Расчетное время больше: '
                            f'{mas[np.where(mas == row)][1]}')
        elif result > max_row:
            score['text'] = mas[np.where(mas == row)][1]
            info['text'] = (f'Расчет: {result}\n'
                            f'СОВПАДЕНИЙ НЕТ!\n'
                            f'Расчетное время меньше: '
                            f'{mas[np.where(mas == row)][1]}')
        elif result in mas[:, 0]:
            score['text'] = mas[np.where(mas == row)][1]
            info['text'] = (f'Расчет: {result}\n'
                            f'ЕСТЬ СОВПАДЕНИЕ!\n'
                            f'Связанное значение: '
                            f'{mas[np.where(mas == row)][1]}')


def clear():
    entry_a.delete(0, 'end')
    entry_b.delete(0, 'end')
    # combobox.set('')
    score['text'] = ''
# endregion

# WINDOW
# region
app = tk.Tk()
app.title('FRM CLEAR')
width = 600
height = 350
x = int((app.winfo_screenwidth() / 2) - (width / 2))
y = int((app.winfo_screenheight() / 2) - (height / 2))
app.geometry(f'{width}x{height}+{x}+{y}')
app.resizable(width=False, height=False)
app['background'] = '#3d505a'
# endregion

# RESOURCES
# region
ttk.Style().configure('btn.TButton', background='#56676f')
ttk.Style().configure('frm_app.TFrame', background='#3d505a')
ttk.Style().configure('frm_content.TFrame', background='#56676f')

frm_app = ttk.Frame(app, style='frm_app.TFrame', padding=[20, 20])
frm_app.place(relheight=1, relwidth=1)

frm_content = ttk.Frame(frm_app, style='frm_content.TFrame', padding=[10, 10])
frm_content.place(relheight=0.5, relwidth=1)
# endregion


# UI
# region
entry_a = ttk.Entry(frm_content)
entry_a.place(x=5, y=10, height=25, width=40)

entry_b = ttk.Entry(frm_content)
entry_b.place(x=5, y=45, height=25, width=40)

score = ttk.Label(frm_content, text='', font='Tahoma 20 bold')
score.place(x=235, y=10, height=38, width=300)

info = ttk.Label(frm_content, text='', font='Tahoma 12', 
                 foreground='#ffffff', background='#56676f')
info.place(x=235, y=50, height=77, width=300)

tk.Button(app, text="Calc", command=calc
          ).place(x=470, y=305, height=25, width=50)
tk.Button(app, text="Clear", command=clear
          ).place(x=530, y=305, height=25, width=50)
# endregion
app.mainloop()

至于尝试Decimal，我会做出这个选择，但由于将来那里不会发生太多的计算，而是搜索和与数组内容进行比较，所以不会有任何区别（或者它不会影响比较的结果）。