Precondition end of script headers or end of script output before headers

In the test Python DB-API When using process scripts , The following error occurred during access ：

see Apache journal , The error message is as follows ：

Premature end of script headers: dblink.py

perhaps

End of script output before headers: dblink.py

dblink.py The script is as follows ：

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import MySQLdb

#  Open database connection 
db = MySQLdb.connect("localhost", " Database user name ", " Database password ", " database ", charset='utf8mb4')

#  Use cursor() Method get operation cursor 
cursor = db.cursor()

#  Use execute Method execution SQL sentence 
cursor.execute("SELECT VERSION()")

#  Use  fetchone()  Method to get a piece of data 
data = cursor.fetchone()

print "Database version : %s " % data

#  Close database connection 
db.close()

Found through debugging , There should be no mark HTTP The end of the header message results in , The program is modified as follows ：

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import MySQLdb

#  Open database connection 
db = MySQLdb.connect("localhost", " Database user name ", " Database password ", " database ", charset='utf8mb4')

#  Use cursor() Method get operation cursor 
cursor = db.cursor()

#  Use execute Method execution SQL sentence 
cursor.execute("SELECT VERSION()")

#  Use  fetchone()  Method to get a piece of data 
data = cursor.fetchone()

print "Content-type:text/html"
print                               #  Blank line , Tell the server to end the header 
print "Database version : %s " % data

#  Close database connection 
db.close()

among ," Content-type:text/html" by HTTP Part of the head , It will send it to the browser and tell the browser the content type of the file , use print Output a blank line to tell the server to end the header information .

The results are as follows ：