[Tutor] python cgi single double quotes

Wed Jul 20 05:45:04 EDT 2016

nitin chandra wrote:

> On inserting the line ...
> 
> print "<p> + "sys.version + "</p>"
> 
> required slight correction
> 
> print "<p>" + sys.version + "</p>"
> 
> and the following script and its output are below :-
> ----------------------------------------
> #!/usr/bin/env python
> 
> import sys
> import cgi
> import psycopg2
> 
> print "Content-type:text/html\r\n\r\n"
> print '<html>'
> print '<head>'
> print '<title>Hello Word - First CGI Program</title>'
> print '</head>'
> print '<body>'
> print '<h2>Hello Word! This is my first CGI program</h2>'
> print "<p>"+ sys.version + "</p>"
> print 'First name: <input type="text" name="fname"><br>'
> print '</body>'
> print '</html>'
> 
> ---------------------------------------------------
> 
> Hello Word! This is my first CGI program
> 
> 2.7.6 (default, Jun 22 2015, 17:58:13) [GCC 4.8.2]
> 
> First name:

If you got that from your server like in the session below...

$ cat first.py
#!/usr/bin/env python

import sys
import cgi
import psycopg2

print "Content-type:text/html\r\n\r\n"
print '<html>'
print '<head>'
print '<title>Hello Word - First CGI Program</title>'
print '</head>'
print '<body>'
print '<h2>Hello Word! This is my first CGI program</h2>'
print "<p>"+ sys.version + "</p>"
print 'First name: <input type="text" name="fname"><br>'
print '</body>'
print '</html>'
$ curl http://myhost/somewhere/first.py

<html>
<head>
<title>Hello Word - First CGI Program</title>
</head>
<body>
<h2>Hello Word! This is my first CGI program</h2>
<p>2.7.6 (default, Jun 22 2015, 17:58:13) 
[GCC 4.8.2]</p>
First name: <input type="text" name="fname"><br>
</body>
</html>

... the following should also work:

$ cat second.py
#!/usr/bin/env python

import sys
import cgi
import psycopg2

print """Content-type:text/html\r\n\r\n
<html>
<head>
<title>Hello Word - First CGI Program</title>
</head>
<body>
<h2>Hello Word! This is my first CGI program</h2>
<p>{version}</p>
First name: <input type="text" name="fname"><br>
</body>
</html>
""".format(version=sys.version)
$ curl http://myhost/somewhere/second.py

<html>
<head>
<title>Hello Word - First CGI Program</title>
</head>
<body>
<h2>Hello Word! This is my first CGI program</h2>
<p>2.7.6 (default, Jun 22 2015, 17:58:13) 
[GCC 4.8.2]</p>
First name: <input type="text" name="fname"><br>
</body>
</html>

If it does you can start looking for the actual problem. I don't expect it 
to have anything to do with your choice of quoting characters, as long as 
you write legal Python 2.