diff --git a/decode.py b/decode.py
new file mode 100644
index 0000000..cc18fb1
--- /dev/null
+++ b/decode.py
@@ -0,0 +1,125 @@
+# -*- coding: utf-8 -*-
+
+import os
+import re
+import time
+
+"""对文件夹中cs文件重命名py"""
+
+
+def ReFileNamePy(dirPath, pattern):
+    """
+    :param dirPath: 文件夹路径
+    :param pattern: 正则匹配模式
+    :return:
+    """
+    # 对目录下的文件进行遍历
+    for file in os.listdir(dirPath):
+        # 判断是否是文件
+        if os.path.isfile(os.path.join(dirPath, file)) == True:
+            # 用正则匹配，去掉不需要的词
+            newName = re.sub(pattern, "py", file)
+            # 设置新文件名
+            newFilename = file.replace(file, newName)
+            # 重命名
+            os.rename(os.path.join(dirPath, file), os.path.join(dirPath, newFilename))
+    # print("文件名已统一修改成功")
+
+
+#判断文件夹
+def listdir2(path, pic_list):  # 传入存储的list
+
+    for file in os.listdir(path):
+        full_file_path = os.path.join(path, file)
+
+        if os.path.isdir(full_file_path):
+            listdir2(full_file_path, pic_list)
+
+        if not os.path.isdir(full_file_path):
+            pic_list.append(path)
+    # print(type(pic_list))
+    # print(path)
+    # print(pic_list)
+    return pic_list
+
+#重写文件
+def ReWriteFile(dirPath):
+    for file in os.listdir(dirPath):
+        # print(type(file))
+        if os.path.isfile(os.path.join(dirPath, file)) == True:
+
+            filename = os.path.join(dirPath, file)
+            if os.path.splitext(filename)[-1] == '.py':
+                fpath1 = os.path.join(dirPath, file)
+                fpath2 = os.path.join(dirPath, f'{file}.xml')
+                # print(fpath1)
+                # print(fpath2)
+                with open(fpath1, 'r', encoding='UTF-8') as f:
+                    # readlines()方法，读取文件中所有行，每一行作为一个字符串存入在列表中，并且换行符用\n来表示。
+                    # 这样我们得到了一个字符串列表，字符串列表中的每个元素代表一行内容
+                    aaa_content = f.readlines()
+                    # 以列表的形式打印aaa.txt中的内容
+                    # print('aaa.txt中的内容为：{}'.format(aaa_content))
+                    # 以追加的形式打开文件fpath2
+                    with open(fpath2, 'w+', encoding='UTF-8') as f1:
+                    # with open(fpath2, 'a+') as f1:
+                        # 循环遍历aaa.txt中每一行的内容，写入文件遇到\n时自动换行
+                        for i in aaa_content:
+                            f1.write(i)
+#删除py结尾
+def FindFileNamePy(dirPath):
+    for file in os.listdir(dirPath):
+        # print(type(file))
+        if os.path.isfile(os.path.join(dirPath, file)) == True:
+            filename = os.path.join(dirPath, file)
+            # print(filename)
+            if os.path.splitext(filename)[-1] == '.py':
+                os.remove(filename)
+            # print(os.path.splitext(filename))
+
+def ReFileNameCs(dirPath, pattern):
+    """
+    :param dirPath: 文件夹路径
+    :param pattern: 正则匹配模式
+    :return:
+    """
+    # 对目录下的文件进行遍历
+    for file in os.listdir(dirPath):
+        # 判断是否是文件
+        if os.path.isfile(os.path.join(dirPath, file)) == True:
+            # 用正则匹配，去掉不需要的词
+            newName = re.sub(pattern, ".cs", file)
+            # 设置新文件名
+            newFilename = file.replace(file, newName)
+            # 重命名
+            os.rename(os.path.join(dirPath, file), os.path.join(dirPath, newFilename))
+    # print("文件转换成功")
+
+if __name__ == '__main__':
+    pic_list = []
+    timeStart = time.time()
+    # path = r"D:\code\cool\dir"
+
+    path = input("输入你需要转换的文件初始目录：")
+    list2 = listdir2(path, pic_list)
+    print("===等待准备转换，请稍等====")
+    for i in range(len(list2)):
+        # print(list2[i])
+        pattern = re.compile(r'cs$')
+        # print(pattern)
+        ReFileNamePy(list2[i], pattern)
+    time.sleep(4)
+    for j in range(len(list2)):
+        ReWriteFile(list2[j])
+    time.sleep(4)
+    for k in range(len(list2)):
+        FindFileNamePy(list2[k])
+    time.sleep(4)
+    for l in range(len(list2)):
+        # print(list2[i])
+        pattern = re.compile(r'.py.xml$')
+        # print(pattern)
+        ReFileNameCs(list2[l], pattern)
+    timeEnd = time.time()
+    print("程序走了%d秒" % (timeEnd - timeStart))
+    input("按任意键退出")