从文本文件创建2D数组并求平均值

def create_2d_array_from_file(file_path, delimiter):
    with open(file_path, 'r') as file:
        content = file.read()
    
    lines = content.split('\n')
    rows = len(lines)
    cols = len(lines[0].split(delimiter))
    
    array_2d = [[0 for _ in range(cols)] for _ in range(rows)]
    
    for i in range(rows):
        values = lines[i].split(delimiter)
        for j in range(cols):
            array_2d[i][j] = float(values[j])
    
    return array_2d

def calculate_average(array_2d):
    total = 0
    rows = len(array_2d)
    cols = len(array_2d[0])
    
    for i in range(rows):
        for j in range(cols):
            total += array_2d[i][j]
    
    average = total / (rows * cols)
    return average

# 示例用法
file_path = 'data.txt'
delimiter = ' '
array_2d = create_2d_array_from_file(file_path, delimiter)
average = calculate_average(array_2d)
print("平均值：", average)