defread_file_to_byte_array(file_path):""" 读取指定路径的文件并返回字节数组 :param file_path: 文件路径 :return: 文件内容的字节数组 """withopen(file_path,'rb')asfile:# 以二进制模式打开文件byte_array=file.read()# 读取文件内容并转换为字节数组returnbyte_array# 返回读取到的字节数组 1. 2....
解决方案:使用文件对象的readinto()方法 示例 import os.path def read_into_buffer(filename): buf=bytearray(os.path.getsize(filename)) with open(filename,'rb') as f: f.readinto(buf) return buf #test case with open('sample.bin','wb') as f: f.write(b'helloworld') buf=read_into_bu...
import os.path def read_into_buffer(filename): buf = bytearray(os.path.getsize(filename)) with open(filename, 'rb') as f: f.readinto(buf) return buf
为了读取数据到一个可变数组中,使用文件对象的readinto() 方法。比如 1 2 3 4 5 6 importos.path defread_into_buffer(filename): buf=bytearray(os.path.getsize(filename)) withopen(filename,'rb') as f: f.readinto(buf) returnbuf 下面是一个演示这个函数使用方法的例子: 1 2 3 4 5 6 7 8...
可以使用readinto()方法 >>>defr_into_buffer(filename):...buf=bytearray(os.path.getsize(filename))...withopen(filename,'rb')asf:...f.readinto(buf)...returnbuf...>>>withopen('test.bin','wb')asf:...f.write(b'Hello World')...11>>>buf=r_into_buffer('test.bin')>>>bufbyte...
image_data = bytearray(file.read()) # 可以在bytearray中修改图像数据 1. 2. 3. 网络通信 在网络通信中,bytearray用于处理网络数据包,构建自定义协议和解析数据。 复制 data_received = bytearray(receive_data()) # 处理接收的数据 1. 2.
当我们需要读取二进制文件直接写入缓冲区,我们可以使用readinto函数进行读取写入数据 with open(test_path, "wb") as w_f: w_f.write(b'hello world') buff = None with open(test_path, mode="rb") as r_f: buff = bytearray(16) ret = r_f.readinto(buff) print(ret) print(buff) buff = ...
py 的字符串模型,也就是说py里怎样组织和划分的字符串问题,比如py3里的模型是 str(统一Unicode),bytes(字节串,以字节为单位的字节序列),bytearray。而py2里的字符串模型是 str(包括ASCII字符串和字节串),unicode字符串。 py2里把字符串和字节串混合,用一个str类型表示,是有些不对的。因为字符串是字符类型,...
3 buf = bytearray(os.path.getsize(filename)) 4 with open(filename, 'rb') as f: 5 f.readinto(buf) 6 return buf 7 8with open('sample.bin', 'wb') as f: 9 f.write(b'hello world') 10 11buf = read_into_buffer('sample.bin') ...
Converting Bytes into ByteArray Let’s assume you are working with a read-only image and you wish to modify it, then first you need to make an editable copy. Situations like this are where our next constructor comes in. As mentioned previously, the Bytes class is just animmutableversion of...