diff --git a/04-CustomLibrary/Custometest/Common.py b/04-CustomLibrary/Custometest/Common.py
index e3d9d6b..2d282ed 100644
--- a/04-CustomLibrary/Custometest/Common.py
+++ b/04-CustomLibrary/Custometest/Common.py
@@ -1,4 +1,7 @@
 import json
+import random
+import hashlib
+import os
 
 #判断一个字符或字符串是否包含于另一个字符串:a是否再b中，是否则返回True，否则返回Falsle
 def aisincludeb(a,b):
@@ -11,4 +14,38 @@ def removeBeforOrAfter(sourcestr,a):
 	#a = "16541616584984"
 	#a = a[2:-2]
 	sourcestr = sourcestr[a]
-	return result
\ No newline at end of file
+	return result
+	
+#分离字符串
+def	string2list(str,split):
+	return	str.split(split)
+
+#用于生成一个指定范围内的整数
+def	randomint(a,b):
+	return random.randint(a,b)
+	
+#较小文件处理方法： 
+def get_md5_01(file_path):
+	md5 = None
+	if os.path.isfile(file_path):
+		f = open(file_path,'rb')
+		md5_obj = hashlib.md5()
+		md5_obj.update(f.read())
+		hash_code = md5_obj.hexdigest()
+		f.close()
+		md5 = str(hash_code).lower()
+	return md5
+
+#较大文件处理方法：
+def get_md5_02(file_path):
+	f = open(file_path,'rb') 
+	md5_obj = hashlib.md5()
+	while True:
+		d = f.read(8096)
+		if not d:
+			break
+		md5_obj.update(d)
+	hash_code = md5_obj.hexdigest()
+	f.close()
+	md5 = str(hash_code).lower()
+	return md5
\ No newline at end of file