python怎么判断文件大小
python3实现指定目录下文件sha256及文件大小统计有时会统计某个目录下有哪些文件，每个文件的sha256及文件大小等相关信息，这里用python3写了个脚本用来实现此功能，此脚本可跨平台，同时支持windows和linux，脚本(get_dir_file_info.py)内容如下：
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import osimport sysimport hashlib def usage(): ''' usage description ''' num = len(sys.argv) if num != 3: print("error: please input two parameters") print("for example: {} path_name save_file_name".format(sys.argv[0])) sys.exit(1) def getfileslist(): ''' get file list ''' input_path_name = sys.argv[1] result = list() for dirpath, dirnames, filenames in os.walk(input_path_name, followlinks=true): for filename in filenames: file_path = os.path.join(dirpath, filename) result.append(file_path) result.sort() return result def calcfilesha256(filname): ''' calculate file sha256 ''' with open(filname, "rb") as f: sha256obj = hashlib.sha256() sha256obj.update(f.read()) hash_value = sha256obj.hexdigest() return hash_value def calcfilesize(filename): ''' calculate file size ''' return os.stat(filename).st_size def getfilecontent(): ''' get file contnet ''' files_list = getfileslist() result = list() for f in files_list: hash = calcfilesha256(f) size = calcfilesize(f) file_name = os.path.basename(os.path.realpath(f)) path_name = os.path.dirname(os.path.realpath(f)) dictionary = {"path": path_name, "filename": file_name, "sha256": hash, "size": size} #print("result: {}".format(dictionary)) result.append(dictionary) return result def writetofile(contents): ''' write content to the specified file ''' fp = open(sys.argv[2], "w") for content in contents: #print("content:", content) str0 = str(content) str1 = str0.replace("\\\\", "/") fp.write(str1) fp.write("\n") fp.close() def replacestr(src_str, new_str): ''' replace source string with new string ''' contents = list() fp = open(sys.argv[2], "r") line = fp.readline() while line: contents.append(line) line = fp.readline() fp.close() fp = open(sys.argv[2], "w") for content in contents: str0 = content.replace(src_str, new_str) fp.write(str0) fp.close() def main(): usage() writetofile(getfilecontent()) replacestr(" ", "") replacestr("'", "\"") if __name__ == "__main__": main() |
执行操作如下：
执行结果及生成的prj_file_list.txt内容如下：
github：python_test
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原文链接：https://blog.csdn.net/fengbingchun/article/details/86665247