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  1. import mmap
  2.  
  3. new = '555'
  4. pattern = b'substr1:\x00\x00'
  5.  
  6. with open('test.bin', 'r+b') as f:
  7. 	mm = mmap.mmap(f.fileno(), 0)
  8.  
  9. 	pos = mm.find(pattern)
  10. 	if pos:
  11. 		mm.seek(pos + len(pattern))
  12. 		mm.write(new.encode())
  13.  
  14. 	mm.close()
Runtime error #stdin #stdout #stderr 0.15s 23484KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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Traceback (most recent call last):
  File "./prog.py", line 6, in <module>
FileNotFoundError: [Errno 2] No such file or directory: 'test.bin'
https://ideone.com/F2DAwX
language:
Python 3 (python  3.12)
created:
4 years ago
visibility:
secret

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