Re: Reverse order of bit in repeating seqence of byte string

2009-01-04 Thread Scott David Daniels
imageguy wrote: On Jan 2, 7:33 pm, John Machin sjmac...@lexicon.net wrote: For some very strange definition of works Well that's embarrassing ... you are correct. I need to convert from 'bgr' to 'rgb' If that is the only issue: import Image p = Image.open('~/VPython.png')

Re: Reverse order of bit in repeating seqence of byte string

2009-01-03 Thread imageguy
On Jan 2, 7:33 pm, John Machin sjmac...@lexicon.net wrote: For some very strange definition of works. You say you have 'bgr' and want to convert it to 'rbg'. The following code converts 'bgr' to 'rgb', which is somewhat more plausible, but not what you said you wanted. Well that's

Re: Reverse order of bit in repeating seqence of byte string

2009-01-03 Thread John Machin
On Jan 4, 7:10 am, imageguy imageguy1...@gmail.com wrote: On Jan 2, 7:33 pm, John Machin sjmac...@lexicon.net wrote: For some very strange definition of works. You say you have 'bgr' and want to convert it to 'rbg'. The following code converts 'bgr' to 'rgb', which is somewhat more

Reverse order of bit in repeating seqence of byte string

2009-01-02 Thread imageguy
I am looking for the most efficient method of replacing a repeating sequence in a byte string returned from a imaging .dll, connected via I receive the byte string with the following sequence 'bgrbgrbgrbgr' and I would like to convert this to 'rbgrbgrbgrbg' FWIW, the string is created using

Re: Reverse order of bit in repeating seqence of byte string

2009-01-02 Thread Steve Holden
imageguy wrote: I am looking for the most efficient method of replacing a repeating sequence in a byte string returned from a imaging .dll, connected via I receive the byte string with the following sequence 'bgrbgrbgrbgr' and I would like to convert this to 'rbgrbgrbgrbg' FWIW, the string

Re: Reverse order of bit in repeating seqence of byte string

2009-01-02 Thread Francesco Bochicchio
imageguy ha scritto: I am looking for the most efficient method of replacing a repeating sequence in a byte string returned from a imaging .dll, connected via I receive the byte string with the following sequence 'bgrbgrbgrbgr' and I would like to convert this to 'rbgrbgrbgrbg' FWIW, the string

Re: Reverse order of bit in repeating seqence of byte string

2009-01-02 Thread Terry Reedy
imageguy wrote: I am looking for the most efficient method of replacing a repeating sequence in a byte string returned from a imaging .dll, connected via I receive the byte string with the following sequence 'bgrbgrbgrbgr' and I would like to convert this to 'rbgrbgrbgrbg' For speed, I would

Re: Reverse order of bit in repeating seqence of byte string

2009-01-02 Thread MRAB
Francesco Bochicchio wrote: imageguy ha scritto: I am looking for the most efficient method of replacing a repeating sequence in a byte string returned from a imaging .dll, connected via I receive the byte string with the following sequence 'bgrbgrbgrbgr' and I would like to convert this to

Re: Reverse order of bit in repeating seqence of byte string

2009-01-02 Thread bearophileHUGS
imageguy: I receive the byte string with the following sequence 'bgrbgrbgrbgr' and I would like to convert this to 'rbgrbgrbgrbg' FWIW, the string is created using ctypes.create_string_buffer function MRAB:   a.tostring() '210543876' That's not the required 'rbgrbgrbgrbg', but you are close

Re: Reverse order of bit in repeating seqence of byte string

2009-01-02 Thread John Machin
On Jan 3, 5:34 am, imageguy imageguy1...@gmail.com wrote: I am looking for the most efficient method of replacing a repeating sequence in a byte string returned from a imaging .dll, connected via I receive the byte string with the following sequence 'bgrbgrbgrbgr' and I would like to convert

Re: Reverse order of bit in repeating seqence of byte string

2009-01-02 Thread Gary Herron
imageguy wrote: I am looking for the most efficient method of replacing a repeating sequence in a byte string returned from a imaging .dll, connected via I receive the byte string with the following sequence 'bgrbgrbgrbgr' and I would like to convert this to 'rbgrbgrbgrbg' FWIW, the string