Python到Shell脚本？

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, in zsh :

$(($(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

Answer 2

您可以测试scrptine 。我认为它可以为您提供帮助。

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