笔者遇到一个大文件，前面的字母都是0A和00，需要处理一些，去掉前面的0A和00
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import os def process_large_file(input_file, output_file): with open(input_file, 'rb') as infile, open(output_file, 'wb') as outfile: # Read and ignore leading zero bytes while True: byte = infile.read(1) if byte == b'\x00' or byte == b'\x0A': continue elif byte: # Write the first non-zero byte and break the loop outfile.write(byte) break else: # If we reach the end of file, break the loop break # Copy the rest of the file if byte: for chunk in iter(lambda: infile.read(1024*1024), b''): outfile.write(chunk) if __name__ == "__main__": input_file = "path/to/your/large_input_file.dat" output_file = "path/to/your/output_file.dat" if os.path.exists(input_file): process_large_file(input_file, output_file) print(f"Processing complete. Output written to {output_file}.") else: print(f"Input file {input_file} does not exist.") |