diff --git a/bypy/bypy.py b/bypy/bypy.py
index 9b9f0eaae51ae7b28f3e3ab0302134375a78b3f8..0760ba5cbfb0392c6841ecad191645ca0e6170b7 100755
--- a/bypy/bypy.py
+++ b/bypy/bypy.py
@@ -3614,7 +3614,7 @@ def printBaiduBanner():
 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 Baidu PCS currently gives totally WRONG MD5 hash for remote files, and I AM NOT GOING TO ADAPT TO IT!
-So it if doesn't work, install version '1.6.10' using the following command:
+So if it doesn't work, install version '1.6.10' using the following command:
 pip install bypy==1.6.10
 Version 1.6.10 has a workaround for this.
 ### Seeking maintainer for this `bypy` project, if you are interested, please create an issue at github, thanks. ###
diff --git a/bypy/cached.py b/bypy/cached.py
index 032793aa3a5db1005b49e55bc03e4db540f20833..c413ecbcbb4862294802019fc4b643535aab4b06 100644
--- a/bypy/cached.py
+++ b/bypy/cached.py
@@ -299,19 +299,18 @@ def md5(filename, slice = const.OneM):
 
 	return encrypt_md5(m.hexdigest())
 
-@cached
 def encrypt_md5(md5str):
-	if len(md5str)!=32:
-		 return md5str
-	for i in range(0,32):
-		v = int(md5str[i],16)
-		if v<0 or v>16:
+	if len(md5str) != 32:
+		return md5str
+	for i in range(32):
+		v = int(md5str[i], 16)
+		if v < 0 or v > 16:
 			return md5str
 	md5str = md5str[8:16] + md5str[0:8] + md5str[24:32] + md5str[16:24]
-	encryptstr = ""
-	for  e  in range(0,len(md5str)):
-		encryptstr += hex(int(md5str[e],16) ^ 15 & e)[2:3]
-	return encryptstr[0:9] + chr(ord("g")+int(encryptstr[9],16)) + encryptstr[10:]
+	encryptstr = ''
+	for e in range(len(md5str)):
+		encryptstr += hex(int(md5str[e], 16) ^ 15 & e)[2:3]
+	return encryptstr[0:9] + chr(ord('g')+int(encryptstr[9], 16)) + encryptstr[10:]
 
 # slice md5 for baidu rapidupload
 @cached