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Escape a console string containing a path with “r” (python)



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Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)
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0















I need to send the following commands to a busybox device via a serial port:



SBC1000 > setenv serverip '192.168.128.100'
SBC1000 > setenv fsfile '1kroot.jffs2-128k'
SBC1000 > saveenv


I can escape the single quotes of the first line without a problem using a backslash:



cmd = 'setenv serverip '192.168.128.100''


I've tried various combinations of backslashes for the second line, but couldn't get the 1kroot part to escape properly. I believe it is being interpreted as a return. I tried double and triple escape with no success.



I finally stumbled upon using



cmd = 'setenv fsfile '1k\u0072oot.jffs2-128k''


to include the r ( not a return ) for my string.



Is there a more readable way to include this r ( not a return ) pattern in my string?










share|improve this question






















  • Did you try cmd = "setenv fsfile '1k\root.jffs2-128k'"? Or use a raw string: cmd = r"setenv fsfile '1kroot.jffs2-128k'"

    – John Szakmeister
    Mar 8 at 19:02












  • Use a raw string cmd = r"setenv fsfile '1kroot.jffs2-128k'"?

    – snakecharmerb
    Mar 8 at 19:02











  • I found this thread here, might solve it. Can't try it myself rn.

    – Aeossa
    Mar 8 at 19:06

















0















I need to send the following commands to a busybox device via a serial port:



SBC1000 > setenv serverip '192.168.128.100'
SBC1000 > setenv fsfile '1kroot.jffs2-128k'
SBC1000 > saveenv


I can escape the single quotes of the first line without a problem using a backslash:



cmd = 'setenv serverip '192.168.128.100''


I've tried various combinations of backslashes for the second line, but couldn't get the 1kroot part to escape properly. I believe it is being interpreted as a return. I tried double and triple escape with no success.



I finally stumbled upon using



cmd = 'setenv fsfile '1k\u0072oot.jffs2-128k''


to include the r ( not a return ) for my string.



Is there a more readable way to include this r ( not a return ) pattern in my string?










share|improve this question






















  • Did you try cmd = "setenv fsfile '1k\root.jffs2-128k'"? Or use a raw string: cmd = r"setenv fsfile '1kroot.jffs2-128k'"

    – John Szakmeister
    Mar 8 at 19:02












  • Use a raw string cmd = r"setenv fsfile '1kroot.jffs2-128k'"?

    – snakecharmerb
    Mar 8 at 19:02











  • I found this thread here, might solve it. Can't try it myself rn.

    – Aeossa
    Mar 8 at 19:06













0












0








0








I need to send the following commands to a busybox device via a serial port:



SBC1000 > setenv serverip '192.168.128.100'
SBC1000 > setenv fsfile '1kroot.jffs2-128k'
SBC1000 > saveenv


I can escape the single quotes of the first line without a problem using a backslash:



cmd = 'setenv serverip '192.168.128.100''


I've tried various combinations of backslashes for the second line, but couldn't get the 1kroot part to escape properly. I believe it is being interpreted as a return. I tried double and triple escape with no success.



I finally stumbled upon using



cmd = 'setenv fsfile '1k\u0072oot.jffs2-128k''


to include the r ( not a return ) for my string.



Is there a more readable way to include this r ( not a return ) pattern in my string?










share|improve this question














I need to send the following commands to a busybox device via a serial port:



SBC1000 > setenv serverip '192.168.128.100'
SBC1000 > setenv fsfile '1kroot.jffs2-128k'
SBC1000 > saveenv


I can escape the single quotes of the first line without a problem using a backslash:



cmd = 'setenv serverip '192.168.128.100''


I've tried various combinations of backslashes for the second line, but couldn't get the 1kroot part to escape properly. I believe it is being interpreted as a return. I tried double and triple escape with no success.



I finally stumbled upon using



cmd = 'setenv fsfile '1k\u0072oot.jffs2-128k''


to include the r ( not a return ) for my string.



Is there a more readable way to include this r ( not a return ) pattern in my string?







python escaping python-unicode






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Mar 8 at 18:57









Phil BrooksPhil Brooks

64948




64948












  • Did you try cmd = "setenv fsfile '1k\root.jffs2-128k'"? Or use a raw string: cmd = r"setenv fsfile '1kroot.jffs2-128k'"

    – John Szakmeister
    Mar 8 at 19:02












  • Use a raw string cmd = r"setenv fsfile '1kroot.jffs2-128k'"?

    – snakecharmerb
    Mar 8 at 19:02











  • I found this thread here, might solve it. Can't try it myself rn.

    – Aeossa
    Mar 8 at 19:06

















  • Did you try cmd = "setenv fsfile '1k\root.jffs2-128k'"? Or use a raw string: cmd = r"setenv fsfile '1kroot.jffs2-128k'"

    – John Szakmeister
    Mar 8 at 19:02












  • Use a raw string cmd = r"setenv fsfile '1kroot.jffs2-128k'"?

    – snakecharmerb
    Mar 8 at 19:02











  • I found this thread here, might solve it. Can't try it myself rn.

    – Aeossa
    Mar 8 at 19:06
















Did you try cmd = "setenv fsfile '1k\root.jffs2-128k'"? Or use a raw string: cmd = r"setenv fsfile '1kroot.jffs2-128k'"

– John Szakmeister
Mar 8 at 19:02






Did you try cmd = "setenv fsfile '1k\root.jffs2-128k'"? Or use a raw string: cmd = r"setenv fsfile '1kroot.jffs2-128k'"

– John Szakmeister
Mar 8 at 19:02














Use a raw string cmd = r"setenv fsfile '1kroot.jffs2-128k'"?

– snakecharmerb
Mar 8 at 19:02





Use a raw string cmd = r"setenv fsfile '1kroot.jffs2-128k'"?

– snakecharmerb
Mar 8 at 19:02













I found this thread here, might solve it. Can't try it myself rn.

– Aeossa
Mar 8 at 19:06





I found this thread here, might solve it. Can't try it myself rn.

– Aeossa
Mar 8 at 19:06












1 Answer
1






active

oldest

votes


















0














The solution was to use double-quotes " " as suggested by John Szakmeister.



I discovered that the command string was being passed to a function inside a private class based on pexpect-serial.



My guess is that my string was being evaluated by pexpect in a greedy way. By using a distinct delimiter, the problem was overcome.






share|improve this answer























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    1 Answer
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    active

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    0














    The solution was to use double-quotes " " as suggested by John Szakmeister.



    I discovered that the command string was being passed to a function inside a private class based on pexpect-serial.



    My guess is that my string was being evaluated by pexpect in a greedy way. By using a distinct delimiter, the problem was overcome.






    share|improve this answer



























      0














      The solution was to use double-quotes " " as suggested by John Szakmeister.



      I discovered that the command string was being passed to a function inside a private class based on pexpect-serial.



      My guess is that my string was being evaluated by pexpect in a greedy way. By using a distinct delimiter, the problem was overcome.






      share|improve this answer

























        0












        0








        0







        The solution was to use double-quotes " " as suggested by John Szakmeister.



        I discovered that the command string was being passed to a function inside a private class based on pexpect-serial.



        My guess is that my string was being evaluated by pexpect in a greedy way. By using a distinct delimiter, the problem was overcome.






        share|improve this answer













        The solution was to use double-quotes " " as suggested by John Szakmeister.



        I discovered that the command string was being passed to a function inside a private class based on pexpect-serial.



        My guess is that my string was being evaluated by pexpect in a greedy way. By using a distinct delimiter, the problem was overcome.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Mar 19 at 15:46









        Phil BrooksPhil Brooks

        64948




        64948





























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