Syntax error with HTML code in python

Question

I am trying to construct a HTML table in python and running into the following syntax error,can anyone please point what is the issue here?

for i in range(len(PLlis)):
    print "i"
    print i
    outstring += "<tr>\n"
    outstring += "<td><a href="wikilinklis[i]">PLlist[0]</a></td>\n"
    outstring += "<td>build_locationlis[i]</td>\n"
    outstring += "<td>lis[i]</td>\n"
    outstring += "<td>Host_loc</td>\n"
    outstring += "<td>Baselis[i]</td>\n"
    outstring += "</tr>\n"
outstring += "</table>\n"
return outstring

SYNTAX ERROR:-

   outstring += "<td><a href="wikilinklis[i]">PLlist[0]</a></td>\n"
                                     ^

SyntaxError: invalid syntax

Please don't change your question this radically. This makes all past answers look unfitting, while at the same time the question already hase recieved enough attention so it may be ignored. It's better to create a new question. — mata
– mata, Commented Nov 4, 2012 at 22:03

mata · Accepted Answer · 2012-11-04 19:45:54Z

4

concatenate your strings:

outstring += "<td><a href=" + wikilinklis[i] + ">PLlist[0]</a></td>\n"

if wikilinks is a python array of strings. Otherwise you have to escape the quotes (if you're trying to write 'wikilinks[i]' as a string).

answered Nov 4, 2012 at 19:45

mata

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Comments

Protagonist · Accepted Answer · 2012-11-04 19:46:33Z

2

You have to rebuild your string like this, because wikilinklis[i] changes for every iteration.

outstring += "<td><a href=%s>%s</a></td>\n" % (wikilinklis[i], PLlist[0])

answered Nov 4, 2012 at 19:46

Protagonist

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Comments

Marcin · Accepted Answer · 2012-11-04 21:25:09Z

0

Don't do what you're doing. Instead of concatenating a bunch of strings, you want to substitute values into a template.

The simplest way to do that is with a string, and the % operator:

"""
<tr>
<td><a href="%(wikilinklis)s">%(PLlist)s</a></td>
<td>%(build_locationlis)s</td>
</tr>
""" % {'wikilinks': 'http://foo', 'PLlist': 'A link' }

Note the triple-quotes, which allow you to embed newlines and quotes.

answered Nov 4, 2012 at 21:25

Marcin

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Comments

Eric · Accepted Answer · 2012-11-04 21:43:30Z

0

Python does not have built in string interpolation. However, you can easily get what you want with "formatstring".format(...)

for i in range(len(PLlis)):
    print "i"
    print i
    outstring += """
    <tr>
        <td><a href="{wikilink}">{PLlist[0]}</a></td>
        <td>{build_location}</td>
        <td>{value}</td>
        <td>Host_loc</td>
        <td>{base}</td>
    </tr>""".format(
        wikilink=wikilinklis[i],
        build_location=build_locationlis[i],
        value=lis[i],
        base=Baselis[i]
    )

outstring += "</table>\n"
return outstring

The triple quote have no meaning other than to allow me to span a string over multiple lines.

edited Nov 4, 2012 at 21:43

answered Nov 4, 2012 at 20:17

Eric

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7 Comments

Marcin Over a year ago

Python does have string interpolation - check out the % operator.

user1795998 Over a year ago

@Eric,running into following error,does this work with python 2.7.3? </tr>""".format(**locals()) TypeError: list indices must be integers, not str

Eric Over a year ago

@Marcin: I was trying to describe "automatic" string interpolation

user1795998 Over a year ago

@Eric ,one list which looks like [None, '\\\\skinnycow\\builds498\\INTEGRATION\\F8064AAAAANLGD1620W.2\r'] gets constructed as "</td> <td>\\skinnycow\builds498\INTEGRATION\F8064AAAAANLGD1620W.2",as you can see "\td" tag is at the front..is it because of carriage return?

Eric Over a year ago

@user1795998: Yes. If you print out a \r to the console, the line will jump back.

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