Python 处理dat文件并画图

import numpy as np
import my_class
import matplotlib.pyplot as plt
import cartopy.crs as ccrs
file = r"D:\lunwen\lunwenshuju\各种作业数据\H500.txt"
f = open(file, "r")
data = np.loadtxt(file, dtype=str,delimiter='\n')
lines = f.readlines()
dataset = []
for line in lines:
    data = line.strip("\n")
    data = data.split('\t')
    dataset.append(data)
dataset = np.array(dataset)
a = np.zeros(48)
i = 0
b = 0
while i < 48:
    a[i] = b
    i = i+1
    b = b+18
a = a.astype(int)  # 化为整数
dataset = np.delete(dataset, a, axis=0)
# 删除空格
# 建立一个37*17*48的三维数组
hgt = np.zeros((17, 37, 48))
# 将二维变成三维
for k in range(48):
    for i in range(17):
        c = dataset[i][0]
        c = c.replace(" ", "")
        w = 6
        for j in range(37):
            hgt[i, j, k] = float(c[w-6:w])
            w = w+6