Python文件操作之二进制文件 Python文件操作之二进制文件详解

file_name = "C:/Users/cheng/Desktop/can.jmx"
with open(file_name, 'rt', ) as can:
    print(can.read())

file_name = "C:/Users/cheng/Desktop/can.jmx"
with open(file_name, 'rb', ) as can:
    print(can.read())

file_name = "C:/Users/cheng/Desktop/can.jmx"
with open(file_name, 'rb', ) as can:
	#读取文本文件，size是以字符为单位的
	#读取二进制文件，size是以字节为单位的
    print(can.read(100))

file_name = "C:/Users/cheng/Desktop/can.jmx"
with open(file_name, 'rb', ) as can:
    # 定义一个新的文件
    new_name = 'to.jmx'
    with open(new_name, 'wb') as cheng:
        # 定义每次读取的大小
        cc = 1024 * 100
        while True:
            # 从已有对象中读取数据
            content = can.read(cc)
            #内容读取完毕，终止循环
            if not content:
                break
            #将读取到的数据写入到新对象中
            cheng.write(content)