使用模式为 rb 或wb 的open() 函数来读取或写入二进制数据。比如: # Read the entire file as a single byte string with open('somefile.bin', 'rb') as f: data = f.read() # Write binary data to a file with open('somefile.bin', 'wb') as f: f.write(b'Hello World') __EOF__ ...
string file_path BYTE_STREAM --o| FILE : contains } SOCKET { string host int port BYTE_STREAM --o| SOCKET : receives } 在这个ER图中,我们可以看到字节流(BYTE_STREAM)与文件(FILE)和Socket(SOCKET)之间的关系。 ByteStream+byteArray data+int length+decode()FileReader+string filePath+readBytes()...
在上面的示例中,byte_array是一个包含4个字节的字节数组。bytes()函数将该字节数组转换为一个字节流对象,并将其赋值给byte_stream变量。 要将字节流数据写入文件,可以使用Python的write()方法。例如,以下代码将字节流数据写入名为output.bin的二进制文件中: with open('output.bin', 'wb') as f: f.write(by...
open('myfile'): #文件迭代器一行一行的读取 open('filename.txt', encoding='latin-1') #Python3. Unicode文本文件(string字符串) open('filename.txt', 'rb') #Python3.0二进制byte文件(bytes字符串) 注:文件数据在脚本中一定是字符串,而写入方法如f.write()不会替我们坐任何字符串转换工作,需要我们...
在讲解bytearray/bytes/string三者的区别之前,有必要来了解一下字节和字符的区别: 1.字节概念 字节(Byte )是计算机信息技术用于计量存储容量的一种计量单位,作为一个单位来处理的一个二进制数字串,是构成信息的一个小单位。最常用的字节是八位的字节,即它包含八位的二进制数; ...
通常情况下,你会用到open()的第2个参数mode,它用字符串来表示,你想要用什么方式,来打开文件。默认值是r代表用read-only只读的方式,打开文件: withopen('dog_breeds.txt','r')asreader:# Further file processing goes here 除了r之外,还有一些mode参数值,这里只简要的列出一些常用的: ...
In [29]: help(file.read) Help on method_descriptor: read(...) read([size]) -> read at most size bytes, returned as a string. If the size argument is negative or omitted, read until EOF is reached. Notice that when in non-blocking mode, less data than what was requested may be...
>>> with open('dog_breeds.txt', 'r') as reader: >>> # Read and print the entire file line by line >>> line = reader.readline() >>> while line != '': # The EOF char is an empty string >>> print(line, end='')
StringIo,BytesIo均属于io包下(3.7环境),均用于像操作文件一样,临时在内存中缓存文本,两者 api与直接进行问下文件io的操作相似。StringIO跟ByteIo的区别在于前者写入字符串,后者写入二进 制。 #可以在一开始就赋值内容 from io import StringIO str_io= StringIO("hello world") print(str_io.readline()) st...
performed on the file according to the opening mode. Note that when the file is opened as a text file, read and write in string mode, using the encoding used by the current computer or the specified encoding; When the file is opened in binary format, the read and write mode is byte ...