How to convert while loop to for loop in my code?

[tatahuft]

I have a working script in python like this:

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import re   handle_file1 = open("example1.so", "rb") hex_file1 = handle_file1.read().hex().upper() handle_file1.close()   handle_file2 = open("example2.so", "rb") hex_file2 = handle_file2.read().hex().upper() handle_file2.close()   array_file1 = re.findall('[0-9A-Fa-f]{2}', hex_file1) array_file2 = re.findall('[0-9A-Fa-f]{2}', hex_file2)   i = 0 while i < len(array_file1):     if array_file1[i] != array_file2[i]:         if i % 4 == 0:             print(array_file1[i] + array_file1[i + 1] + array_file1[i + 2] + array_file1[i + 3] + "\t" + array_file2[i] + array_file2[i + 1] + array_file2[i + 2] + array_file2[i + 3])             i += 4         elif i % 4 == 1:             print(array_file1[i - 1] + array_file1[i] + array_file1[i + 1] + array_file1[i + 2] + "\t" + array_file2[i - 1] + array_file2[i] + array_file2[i + 1] + array_file2[i + 2])             i += 3         elif i % 4 == 2:             print(array_file1[i - 2] + array_file1[i - 1] + array_file1[i] + array_file1[i + 1] + "\t" + array_file2[i - 2] + array_file2[i - 1] + array_file2[i] + array_file2[i + 1])             i += 2         elif i % 4 == 3:             print(array_file1[i - 3] + array_file1[i - 2] + array_file1[i - 1] + array_file1[i] + "\t" + array_file2[i - 3] + array_file2[i - 2] + array_file2[i - 1] + array_file2[i])             i += 1     else:         i += 1

How can I convert the while loop into for loop?
I have AutoIT script like this:

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For $i = 1 To UBound($aFile1, $UBOUND_ROWS)-1      If $aFile1[$i] <> $aFile2[$i] Then          If Mod($i, 4) = 0 Then              FileWrite(@ScriptDir & '\' & 'Result.txt', $aFile1[$i] & ' ' & $aFile1[$i+1] & ' ' & $aFile1[$i+2] & ' ' & $aFile1[$i+3] & '    ' & $aFile2[$i] & ' ' & $aFile2[$i+1] & ' ' & $aFile2[$i+2] & ' ' & $aFile2[$i+3] & @CRLF)              $i = $i + 4          ElseIf Mod($i, 4) = 1 Then              FileWrite(@ScriptDir & '\' & 'Result.txt', $aFile1[$i-1] & ' ' & $aFile1[$i] & ' ' & $aFile1[$i+1] & ' ' & $aFile1[$i+2] & '    ' & $aFile2[$i-1] & ' ' & $aFile2[$i] & ' ' & $aFile2[$i+1] & ' ' & $aFile2[$i+2] & @CRLF)              $i = $i + 3          ElseIf Mod($i, 4) = 2 Then              FileWrite(@ScriptDir & '\' & 'Result.txt', $aFile1[$i-2] & ' ' & $aFile1[$i-1] & ' ' & $aFile1[$i] & ' ' & $aFile1[$i+1] & '    ' & $aFile2[$i-2] & ' ' & $aFile2[$i-1] & ' ' & $aFile2[$i] & ' ' & $aFile2[$i+1] & @CRLF)              $i = $i + 2          ElseIf Mod($i, 4) = 3 Then              FileWrite(@ScriptDir & '\' & 'Result.txt', $aFile1[$i-3] & ' ' & $aFile1[$i-2] & ' ' & $aFile1[$i-1] & ' ' & $aFile1[$i] & '    ' & $aFile2[$i-3] & ' ' & $aFile2[$i-2] & ' ' & $aFile2[$i-1] & ' ' & $aFile2[$i] & @CRLF)              $i = $i + 1          EndIf      ElseIf $aFile1[$i] = $aFile2[$i] Then          ContinueLoop      EndIf Next

I want to convert my while loop into for loop
or I simply want to convert my for loop from AutoIT to Python

How to do that?

Thank You

[deanhystad]

A for loop is the wrong choice if the code body changes the index.

Are you trying to compare binary files? Converting to str and using re is not how I would do this

[tatahuft]

A for loop is the wrong choice if the code body changes the index.

Are you trying to compare binary files? Converting to str and using re is not how I would do this

I actually want to automate something like if I compare two file in a hex editor
Do you have any suggestion for me please?

[deanhystad]

Looking at your code I think you want to read the files 4 bytes at a time and compare the bytes objects

[snippsat]

In your first Thread i advice how to get the hex view same as in hex editor.
When it comes to compare 2 files it can be easiest to work with the raw bytes directly and only convert those bytes(to hex) that differ for printing.
Why This is Easiest:

• No complicated indexing or regex.
  
• Works purely at the binary level(Compare byte by byte)
  
• Easy to adapt for more specialized output formatting (like printing differences in 4-byte chunks or aligned hex dumps).
  

Let say i use binary file example in you first thread.
Example1.txt:

Output:
<G#VYYf88\g:Ap)2G%(c]329i0XS+KDaE'z?!dv[T](FuzR_

Change R to Z and add hello.
Example2.txt:

Output:
<G#VYYf88\g:Ap)2G%(c]329i0XS+KDaE'z?!dv[T](FuzZ_hello

So this approach will find all changes and print :02X(hex value in the f-string) out.

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def compare_files_hex(file1, file2):     with open(file1, 'rb') as f1, open(file2, 'rb') as f2:         data1 = f1.read()         data2 = f2.read()       min_len = min(len(data1), len(data2))     # Compare the overlapping portion of both files     for n in range(min_len):         if data1[n] != data2[n]:             print(f"Offset {n}: {data1[n]:02X} != {data2[n]:02X}")     # If one file is longer, print the extra bytes as differences     if len(data1) > min_len:         # data1 has extra bytes         for n in range(min_len, len(data1)):             print(f"Offset {n}: {data1[n]:02X} != (no data in {file2})")     if len(data2) > min_len:         # data2 has extra bytes         for n in range(min_len, len(data2)):             print(f"Offset {n}: (no data in {file1}) != {data2[n]:02X}")   compare_files_hex("example2.txt", "example1.txt")

Output:
Offset 46: 5A != 52
Offset 48: 68 != (no data in example1.txt)
Offset 49: 65 != (no data in example1.txt)
Offset 50: 6C != (no data in example1.txt)
Offset 51: 6C != (no data in example1.txt)
Offset 52: 6F != (no data in example1.txt)

So if eg want to now what hex values 68 65 .... are can use bytes.fromhex()

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>>> hex_string = "68" >>> bytes_obj = bytes.fromhex(hex_string) >>> bytes_obj b'h' >>> hex_string = "65" >>> bytes_obj = bytes.fromhex(hex_string) >>> bytes_obj b'e' >>> # To str just add decode >>> bytes_obj.decode() 'e'