question:import re import requests import difflib API_KEY = "CXTB4IUT31N836G93ZI3YQBEWBQEGGH5QS" BASE_URL = "https://api.bscscan.com/api" similarity_threshold = 0.01 def get_contract_source_code(address): params = { "module": "contract", "action": "getsourcecode", "address": address, "apiKey": API_KEY } response = requests.get(BASE_URL, params=params) data = response.json() if data["status"] == "1": source_code = data["result"][0]["SourceCode"] return source_code else: return None def jaccard_similarity(str1, str2): a = set(str1.split()) b = set(str2.split()) c = a.intersection(b) return float(len(c)) / (len(a) + len(b) - len(c)) def find_similar_contracts(reference_addresses, candidate_addresses): reference_source_codes = {} for reference_address in reference_addresses: source_code = get_contract_source_code(reference_address) if source_code is not None: reference_source_codes[reference_address] = source_code if not reference_source_codes: print("No source code found for reference contracts") return [] similar_contracts = {} for address in candidate_addresses: candidate_source_code = get_contract_source_code(address) if candidate_source_code is not None: for reference_address, reference_source_code in reference_source_codes.items(): similarity = jaccard_similarity(candidate_source_code, reference_source_code) if similarity >= similarity_threshold: if reference_address not in similar_contracts: similar_contracts[reference_address] = [(address, similarity)] else: similar_contracts[reference_address].append((address, similarity)) return similar_contracts def print_code_difference(reference_code, candidate_code): reference_lines = reference_code.splitlines() candidate_lines = candidate_code.splitlines() diff = difflib.unified_diff(reference_lines, candidate_lines) for line in diff: print(line) def filter_lines(code, patterns): lines = code.splitlines() filtered_lines = [] for line in lines: line = line.lstrip() # Removing leading spaces include_line = True for pattern in patterns: if line.startswith(pattern): include_line = False break if include_line: filtered_lines.append(line) return "n".join(filtered_lines) def save_code_to_file(filename, code): with open(filename, "w") as f: f.write(code) if __name__ == "__main__": reference_addresses = ["0x445645eC7c2E66A28e50fbCF11AAa666290Cd5bb"] candidate_addresses = ["0x4401E60E39F7d3F8D5021F113306AF1759a6c168"] exclude_patterns = ["//", "*", "/**", "/", "*/"] similar_contracts = find_similar_contracts(reference_addresses, candidate_addresses) print("Contracts with similar source code (ignoring comments):") for reference_address, similar_addresses in similar_contracts.items(): reference_code = get_contract_source_code(reference_address) filtered_reference_code = filter_lines(reference_code, exclude_patterns) save_code_to_file(f"{reference_address}_code.txt", filtered_reference_code) for address, similarity in similar_addresses: print(f"Reference contract: {reference_address}") candidate_code = get_contract_source_code(address) filtered_candidate_code = filter_lines(candidate_code, exclude_patterns) save_code_to_file(f"{address}_code.txt", filtered_candidate_code) print(f"Similar contract: {address} with a similarity of {similarity:.2f}") if similarity < 1.0: print("Code differences:") print_code_difference(filtered_reference_code, filtered_candidate_code) print("n") Complete the code above so that in the resulting text files the lines in which there are no characters

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