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Created on 2015-09-19 02:45 by Jared Bevis, last changed 2022-04-11 14:58 by admin. This issue is now closed.
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| msg251049 - (view) | Author: Jared Bevis (Jared Bevis) | Date: 2015-09-19 02:45 | |
I'm a new python learner but I noticed inconsistent behavior of the backspace character when used in strings. I'm running 2.7.10. Whenever the backspace character '\b' is at the very end of a string, nothing happens, but if it is in the middle of string it behaves as expected. For example: print "12345" + '\b' returns: >>>12345 But: print "12345" + '\b' + '6' returns: >>> 12346 |
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| msg251051 - (view) | Author: Martin Panter (martin.panter) *  |
Date: 2015-09-19 04:00 | |
Python itself doesn’t treat backspace specially. What you are probably seeing is the terminal interpreting the backspace specially by moving the cursor left (without erasing anything). >>> s = "12345" + '\b' + '6' >>> s '12345\x086' >>> s[5] # ASCII code for backspace is 0x08 '\x08' If you redirect the output to a file or other program, you will also see the backspace code is still there: $ python2 -c 'print "12345" + "\b" + "6"' | hexdump -C 00000000 31 32 33 34 35 08 36 0a |12345.6.| 00000008 |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:58:21 | admin | set | github: 69361 |
| 2015-09-19 04:00:33 | martin.panter | set | status: open -> closed nosy: + martin.panter messages: + msg251051 components: - Regular Expressions resolution: not a bug |
| 2015-09-19 02:45:58 | Jared Bevis | create | |