Python二进制文件的读取与写入
当读取音视频、图片等二进制文件时,需要采用二进制的读取方法。
一、读取
with open(file,mode) as f:
pass
file:文件路径
mode:rb 读取二进制文件
strb = f.read()
功能:一次性读取所有内容,以二进制的字符串返回。
strb = f.read(size)
功能:一次性读取size个字节
注意:一般情况下,使用f.read(size)居多
with open("1.jpg","rb") as f:
#循环读取一张图片,一次性读取1024个字节
while True:
strb = f.read(1024)
if strb == b"":
break
print(strb)
二、写入
with open(file,mode) as f:
pass
file:文件路径
mode:wb/ab 读取二进制文件
f.write(strb)
def copyfile(path1,path2):
with open(path1,"rb") as f1:
with open(path2,"wb") as f2:
while True:
strb = f1.read(1024)
if strb == b"":
break
f2.write(strb)