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)