python读取txt数据的操作步骤

def read_txt(inputpath, outputpath):
    with open(outputpath, 'w', encoding='utf-8') as file:
        with open(inputpath, 'r', encoding='utf-8') as infile:
            # 第一种：读取所有行
            #data1 = infile.readlines()
            #print(data1)
            # 输出：['1 2 3 4 5\n', '6 7 8 9 10']
 
            # 第二种：每行分开读取
            data2 = []
            for line in infile:
                data_line = line.strip("\n").split()  # 去除首尾换行符，并按空格划分
                print(data_line)
                data2.append([int(i) for i in data_line])
            print(data2)
            # 输出：[[1, 2, 3, 4, 5], [6, 7, 8, 9, 10]]
 
            # 第三种：每个字符分开读取
            data = data2
            for i in range(len(data2)):
                for j in range(len(data2[i])):
                    data[i][j] = str(data2[i][j])
            print(data)
            # 输出：[['1', '2', '3', '4', '5'], ['6', '7', '8', '9', '10']]
 
            # 写入方法
            for line in data2:
                # data = '' + '\t'.join(str(i) for i in line) + '\n'  # 用\t隔开
                data = '' + ' '.join(str(i) for i in line) + '\n'  # 用空格隔开
                file.write(data)
 
if __name__ == "__main__":
    input_path = '1.txt'
    output_path = '2.txt'
    read_txt(input_path, output_path)