Python Function: Search bytes sequence in file

Last update on December 21 2024 07:29:10 (UTC/GMT +8 hours)

Write a Python function that searches for a bytes sequence within a file opened in byte mode.

Sample Solution:

Code:

import io
def search_bytes_in_file(file_path, match_bytes):
  with io.open(file_path, mode='rb') as file:
    for line in file:
      if match_bytes in line:
        print(f"Match found in file {file_path}")
        return True
    else:
      return False

# Example usage
match = b'foobar'  
result = search_bytes_in_file('fontawesome-webfont.bin', match)
if result:
  print("Match found") 
else:
  print("No match")

Output:

No match

Explanation:

In the exercise above -

• Open file in byte mode 'rb'
• Iterate over the file line-by-line as bytes
• Use the 'in' operator to check if match_bytes is present
• Return True if match found, False otherwise
• Can search any bytes sequence like encoded data

Flowchart:

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