在python中将字符串转换为二维数组

def convert_to_2d_array(string, delimiter, rows, columns):
    # Step 1: Split the string into a 1D array
    arr_1d = string.split(delimiter)
    
    # Step 2: Calculate the number of rows and columns
    num_rows = rows
    num_columns = columns
    
    # Step 3: Create an empty 2D array
    arr_2d = [[0 for _ in range(num_columns)] for _ in range(num_rows)]
    
    # Step 4: Populate the 2D array with elements from the 1D array
    for i in range(num_rows):
        for j in range(num_columns):
            index = i * num_columns + j
            if index < len(arr_1d):
                arr_2d[i][j] = arr_1d[index]
    
    return arr_2d

# Example usage
string = "1,2,3,4,5,6,7,8,9"
delimiter = ","
rows = 3
columns = 3

result = convert_to_2d_array(string, delimiter, rows, columns)
print(result)

[[1, 2, 3], [4, 5, 6], [7, 8, 9]]