用python3实现指定目录下文件sha256及文件大小统计

淩亂°似流年 2022-03-22 08:38 263阅读 0赞

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：

import os
    import sys
    import 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：

![20190127130634809.png][]

执行结果及生成的prj\_file\_list.txt内容如下：

![20190127130801759.png][]

**GitHub**：[https://github.com/fengbingchun/Python\_Test][https_github.com_fengbingchun_Python_Test]

[20190127130634809.png]: /images/20220322/234c51b6359d4a4dade8024439c48f5a.png
[20190127130801759.png]: /images/20220322/7f76fa4511c54fec87c43eb1d408c28f.png
[https_github.com_fengbingchun_Python_Test]: https://github.com/fengbingchun/Python_Test