def copyFile():
# Receive the file name entered by the user
old_File=input(' Please enter the file to back up :')
# Construct a new file name , Add the backup suffix
File=old_File.split('.')
new_File=File[0]+'_ Backup .'+File[1]
try:
# At the same time, open the files to be backed up , A new file
with open(old_File,'r',encoding='utf-8') as Old_f,open(new_File,'a',encoding='utf-8') as New_f:
while True:
# Read once 1024 character , Prevent memory leaks
Content=Old_f.read(1024)
New_f.write(Content)
# When the read content character length is less than 1024 Description has been read
if len(Content)<1024:
break
except Exception as msg:
print(msg)
copyFile()
