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Date: Sun, 3 Nov 2013 04:12:37 -0700
Subject: Re: Parsing multiple lines from text file using regex
From: Jason Friedman <jsf80238@gmail.com>
To: Marc <marc@marcd.org>
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>  Hi,
> I am having an issue with something that would seem to have an easy
> solution, but which escapes me.  I have configuration files that I would
> like to parse.  The data I am having issue with is a multi-line attribute
> that has the following structure:
>
> banner <option> <banner text delimiter>
> Banner text
> Banner text
> Banner text
> ...
> <banner text delimiter>
>
This is an alternative solution someone else posted on this list for a
similar problem I had:

#!/usr/bin/python3
from itertools import groupby
def get_lines_from_file(file_name):
    with open(file_name) as reader:
        for line in reader.readlines():
            yield(line.strip())

counter = 0
def key_func(x):
    if x.strip().startswith("banner") and x.strip().endswith("<banner text
delimiter>"):
        global counter
        counter += 1
    return counter

for key, group in groupby(get_lines_from_file("my_data"), key_func):
    print(list(group)[1:-1])

--089e0118482c8cc59c04ea43e041
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><br><div class=3D"gmail_extra"><div class=3D"gmail_quote">=
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;p=
adding-left:1ex">
<u></u>






<div>


<p dir=3D"LTR"><span lang=3D"en-us"></span><span lang=3D"en-us"></span><spa=
n lang=3D"en-us"><font face=3D"Consolas">Hi,<br>
I am having an issue with something that would seem</font></span><span lang=
=3D"en-us"></span><span lang=3D"en-us"></span><span lang=3D"en-us"> <font f=
ace=3D"Consolas">to</font></span><span lang=3D"en-us"></span><span lang=3D"=
en-us"></span><span lang=3D"en-us"> <font face=3D"Consolas">have an easy so=
lution,</font></span><span lang=3D"en-us"></span><span lang=3D"en-us"></spa=
n><span lang=3D"en-us"> <font face=3D"Consolas">but</font></span><span lang=
=3D"en-us"></span><span lang=3D"en-us"></span><span lang=3D"en-us"> <font f=
ace=3D"Consolas">which escapes me.=C2=A0 I have configuration files that I =
would like to parse.=C2=A0 The data I am having issue with is a multi-line =
attribute that has the following structure:<br>

<br>
banner &lt;option&gt; &lt;banner text delimiter&gt;<br>
Banner text<br>
Banner text<br>
Banner text<br>
...<br>
&lt;banner text delimiter&gt;</font></span></p></div></blockquote><div><div=
>This is an alternative solution someone else posted on this list for a sim=
ilar problem I had:</div><div><br></div><div>#!/usr/bin/python3</div><div>
from itertools import groupby</div><div>def get_lines_from_file(file_name):=
</div><div>=C2=A0 =C2=A0 with open(file_name) as reader:</div><div>=C2=A0 =
=C2=A0 =C2=A0 =C2=A0 for line in reader.readlines():</div><div>=C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 yield(line.strip())</div><div>
<br></div><div>counter =3D 0</div><div>def key_func(x):</div><div>=C2=A0 =
=C2=A0 if x.strip().startswith(&quot;banner&quot;) and x.strip().endswith(&=
quot;&lt;banner text delimiter&gt;&quot;):</div><div>=C2=A0 =C2=A0 =C2=A0 =
=C2=A0 global counter</div><div>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 counter +=3D 1</div><div>=C2=A0 =C2=A0 return c=
ounter</div><div><br></div><div>for key, group in groupby(get_lines_from_fi=
le(&quot;my_data&quot;), key_func):</div><div>=C2=A0 =C2=A0 print(list(grou=
p)[1:-1])</div><div>=C2=A0</div></div><div>
<br></div><div>=C2=A0</div></div><br></div></div>

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