Extracting text from a string

[Tempo]

Hello. I am having a little trouble extracting text from a string. The
string that I am dealing with is pasted below, and I want to extract
the prices that are contained in the string below. Thanks in advanced
for any and all help. Thank you.



<span class="sale">
$14.99
</span>, <span class="sale">
$27.99
</span>, <span class="sale">
$66.99
</span>, <span class="sale">
$129.99
</span>, <span class="sale">
$254.99
</span>

 

[Claudio Grondi]

Hello. I am having a little trouble extracting text from a string. The
string that I am dealing with is pasted below, and I want to extract
the prices that are contained in the string below. Thanks in advanced
for any and all help. Thank you.



<span class="sale">
$14.99
</span>, <span class="sale">
$27.99
</span>, <span class="sale">
$66.99
</span>, <span class="sale">
$129.99
</span>, <span class="sale">
$254.99
</span>

What have you tried?

Taking a look into regular expressions in the Python tutorial (4.2 re --
Regular expression operations) should give you all you need.

Claudio Grondi

 

[Tempo]

Okay, so it sounds like I am in the right direction. However, I am not
sure that the text is in a string or some other format becasue the
string is enclosed in "[" and "]", not in ' '.

 

[Claudio Grondi]

Okay, so it sounds like I am in the right direction. However, I am not
sure that the text is in a string or some other format becasue the
string is enclosed in "[" and "]", not in ' '.

In case you have it like ['the string'], the actual string will be:
['the string'][0].
Just use IDLE to test your ideas:

>>> ['the string'][0] 'the string'
>>>

Claudio Grondi

 

[Tempo]

This is the output I get:


[<span class="sale">
$14.99
</span>, <span class="sale">
$27.99
</span>, <span class="sale">
$66.99
</span>, <span class="sale">
$129.99
</span>, <span class="sale">
$254.99

 

[bearophileHUGS]

Tempo:

I am having a little trouble extracting text from a string. The
string that I am dealing with is pasted below, and I want to
extract the prices that are contained in the string below.

This may help:
['66.99', '.99']

You can read about Python regular expressions:
http://www.amk.ca/python/howto/regex/
http://docs.python.org/lib/module-re.html

------------------------

Perl 6 regular expressions are verbose by default, future Python may do
the same.

From Apocalypse 5, by Larry Wall: http://dev.perl.org/perl6/doc/design/apo/A05.html

In real life, tokens are more recognizable if they are separated by whitespace.<

Now, you may rightly point out that + is something we already have, and we already introduced /x to allow whitespace, so why is this bullet point here? Well, there's a lot of inertia in culture, and the problem with /x is that it's not the default, so people don't think to turn it on when it would probably do a lot of good. The culture is biased in the wrong direction. Whitespace around tokens should be the norm, not the exception. It should be acceptable to use whitespace to separate tokens that could be confused.<

Bye,
bearophile

 

[samir]

Saluton!

> I am having a little trouble extracting text from a string. The
> string that I am dealing with is pasted below, and I want to
> extract the prices that are contained in the string below.

This string is absolutely an XML chunk.
Just use xmllib.

Adiaux
Samir

 

[Claudio Grondi]

This is the output I get:




[<span class="sale">
$14.99
</span>, <span class="sale">
$27.99
</span>, <span class="sale">
$66.99
</span>, <span class="sale">
$129.99
</span>, <span class="sale">
$254.99
</span>]

I think, guessing your knowledge level in Python, the best solution for
you to start with and learn some Python basics will be :

>>> prices.split()[2] '$14.99'
>>> prices.split()[6] '$27.99'
>>> prices.split()[10] '$66.99'
>>> prices.split()[14] '$129.99'
>>> prices.split()[18]

'$254.99'

Claudio Grondi