Calling a python to run a shell script

Question

I'm currently trying run the shell script by using the os.system method in python.

Python code:

file = open("History.txt","w")
file.write(history)
os.system('./TFPupload.sh')

Shell script code:

#!/bin/sh

HOST="ftp.finalyearproject95.com"
USER='*****'
PASSWD='*****'
FILE='History.txt'

ftp -n $HOST <<END_SCRIPT
quote USER $USER
quote PASS $PASSWD
put $FILE
quit
END_SCRIPT

echo ">>>uploaded<<<\n"

exit 0

At first, when i tried to run the python code and shell script one by one it works perfectly. However, when i attempt to use python to run shell script, instead of uploading the 'History.txt' file that contains data into the database, the file uploaded is an empty file. When i check using 'nano History.txt', it does contain data, only when it passes the text file to the database will be empty. Why is it?

You need to close or flush the opened file to ensure the contents written are written to disk. — metatoaster, Apr 27 '17 at 06:40

score 0 · Answer 1 · edited May 23 '17 at 12:34

0

Use With statement to open files whenever possible .

with open("History.txt","w") as file :
  file.write(history)

os.system('./TFPupload.sh')

with statement takes care of closing the fd on its own .

some Ref : What is the python "with" statement designed for?

edited May 23 '17 at 12:34

Community

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answered Apr 27 '17 at 06:50

Abhimanyu singh

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Calling a python to run a shell script

1 Answers1