identifying and parsing string in text file

[Bryan.Fodness]

I have a large file that has many lines like this,

<element tag="300a,0014" vr="CS" vm="1" len="4"
name="DoseReferenceStructureType">SITE</element>

I would like to identify the line by the tag (300a,0014) and then grab
the name (DoseReferenceStructureType) and value (SITE).

I would like to create a file that would have the structure,

DoseReferenceStructureType = Site
...
...

Also, there is a possibility that there are multiple lines with the
same tag, but different values. These all need to be recorded.

So far, I have a little bit of code to look at everything that is
available,

for line in open(str(sys.argv[1])):
i_line = line.split()
if i_line:
if i_line[0] == "<element":
a = i_line[1]
b = i_line[5]
print "%s | %s" %(a, b)

but do not see a clever way of doing what I would like.

Any help or guidance would be appreciated.

Bryan

[Nemesis]

Br***********@gmail.com wrote:

I have a large file that has many lines like this,

<element tag="300a,0014" vr="CS" vm="1" len="4"
name="DoseReferenceStructureType">SITE</element>

I would like to identify the line by the tag (300a,0014) and then grab
the name (DoseReferenceStructureType) and value (SITE).

I would like to create a file that would have the structure,

DoseReferenceStructureType = Site
...
...

You should try with Regular Expressions or if it is something like xml there
is for sure a library you can you to parse it ...
anyway you can try something simpler like this:

elem_dic=dict()
for line in open(str(sys.argv[1])):
line_splitted=line.split()
for item in line_splitted:
item_splitted=item.split("=")
if len(item_splitted)>1:
elem_dic[item_splitted[0]]=item_splitted[1]

.... then you have to retrieve from the dict the items you need, for example,
with the line you posted you obtain these items splitted:

['<element']
['tag', '"300a,0014"']
['vr', '"CS"']
['vm', '"1"']
['len', '"4"']
['name', '"DoseReferenceStructureType">SITE</element>']

and elem_dic will contain the last five, with the keys
'tag','vr','vm','len','name' and teh values 300a,0014 etc etc
i.e. this:

{'vr': '"CS"', 'tag': '"300a,0014"', 'vm': '"1"', 'len': '"4"', 'name': '"DoseReferenceStructureType">SITE</element>'}


--
Age is not a particularly interesting subject. Anyone can get old. All
you have to do is live long enough.

[bruno.desthuilliers]

On 8 mar, 20:49, "[e-mail]" <[e-mail]>
wrote:

I have a large file that has many lines like this,

<element tag="300a,0014" vr="CS" vm="1" len="4"
name="DoseReferenceStructureType">SITE</element>

I would like to identify the line by the tag (300a,0014) and then grab
the name (DoseReferenceStructureType) and value (SITE).

It's obviously an XML file, so use a XML parser - there are SAX and
DOM parsers in the stdlib, as well as the ElementTree module.