Python to Shell Script?

Question

How can I convert this simple python code to Shell script?

 import time
 import sys
 cur_time = int(time.time()*1000)
 print cur_time
 sys.exit(1)

Answer 1

It's just multiplying the seconds since epoch by 1000 (with some added nanosecond precision).

You can do:

$(($(date '+%s') * 1000))

With the nanosecond precision, inzsh:

$(($(date '+%s.%N') * 1000))

Precision to 2 decimal points, in zsh:

printf '%.2f\n' $(($(date '+%s.%N') * 1000))

As bash (and other shells) does not support floating point arithmetic, you can use bc instead.

Example:

% echo $(($(date '+%s') * 1000))
1462194433000
% echo $(($(date '+%s.%N') * 1000))
1462194596950.2983
% printf '%.2f\n' $(($(date '+%s.%N') * 1000))
1462194696479.11

• schily: date +%s delivers: %s
• schily: This does not change things. A more portable way to print the current time_t value is to run awk 'BEGIN{srand(); print srand() }'.

Answer 2

You can test scrptine.I think it can help you.

Answer 3

You can change the pemission

 chmod +x file

and add in the first line

#!/usr/bin/env python

If I am correct it's used to call without the preceding language. The script then calls the language's interpreter to run the code inside the script