Python Forum
save data in .txt after certain interval - Printable Version

+- Python Forum (https://python-forum.io)
+-- Forum: Python Coding (https://python-forum.io/forum-7.html)
+--- Forum: General Coding Help (https://python-forum.io/forum-8.html)
+--- Thread: save data in .txt after certain interval (/thread-21758.html)

save data in .txt after certain interval - Shaswat - Oct-13-2019

Hi Everyone,

Here is just snippet of my code to tell exact my requirement and not my actual code.

import time, datetime

ctr=100

opn = open("log.txt","a+")

while(ctr):
    opn.writelines(str(ctr))
    ctr=ctr-1
    time.sleep(1)
    print(ctr)

opn.close() #close file
I am working on automating a process in which I need to save the data after certain interval of time.
Above method works but data will store only after the file closes. Also, I can not get the data in file if user interrupt the process.

Is there any way I can save the log after every interval before "opn.close" instruction? Guide me if I am wrong as I already read the details of "OPEN" in Python manual

Thanks

RE: save data in .txt after certain interval - Gribouillis - Oct-13-2019

Use the flush() method. Also your use of writelines is not correct
import time, datetime
 
ctr=100
 
opn = open("paillasse/ecrlog.txt","a+")
 
while(ctr):
    opn.write(str(ctr) + '\n')
    opn.flush()
    ctr=ctr-1
    time.sleep(1)
    print(ctr)
 
opn.close() #close file