Tagged Questions
1
vote
3answers
19 views
Finding certain pattern in string, why the other matches?
I want to isolate numbers in a string. These will come directly before and after a /
I have done this which is adequate:
a = "test0/0"
print re.split("(\d)/(\d)", a)
This has the required numbers ...
1
vote
4answers
39 views
Regular expression to match an empty string?
I want to match and group any of these listed words:
aboutus/,race/,cruise/,westerlies/,weather/,reach/,gear/ or empty_string
Here is a solution, but which will not match the empty_string:
...
0
votes
0answers
13 views
java.net.MalformedURLException:Fetching data from links embedded in a website using apache nutch
Hi guys I am using apache nutch to extract data. I am able to extract data from a website like so:
:-http://www.truelocal.com.au/
but can we fetch data for specific links from the websites?
:- ...
0
votes
1answer
12 views
Overriding URLField's validation with custom validation
How can I override django's URLField's validation with a custom validation? And where should this be done?
I want it to accept urls without a domain ending too.
0
votes
1answer
17 views
MongoDB: Transform PHP code to Python code
I was searching a way to combine $in and $regex in mongoDB and found exactly the same question with exactly what I want to do. The problem is that the answer is in PHP and I don't have an idea about ...
0
votes
1answer
33 views
Python Regular Expressions Re.Search
I am having issues figuring out what this regular expression means:
import re
if re.search('^(0*)$','010'):
print 'match'
else:
print 'no match'
I'm mainly confused about the 0* in the ...
0
votes
3answers
28 views
Regex extract text inside '**' characters
I need a regex to extract a word from among a plethora of ** characters. I know this is trivial for regex gurus... I'm just having some difficulty with it.
phrase = re.search('\*.*(\w.*)\*', ...
0
votes
0answers
21 views
Matching regex to list items in Python
I am attempting to write a python script that shows the URL flow on my installation of nginx. So I currently have my script opening my 'rewrites' file that contains a list of of regex's and locations ...
0
votes
1answer
37 views
Verify if string is valid regex?
EDIT: I cannot use python's 're'
This is for an assignment so I don't want the answer in code, rather just some tips in the right direction.
I am trying to code a function that returns True if ...
2
votes
1answer
32 views
How to get multiple regex matches in python?
I have this text:
<div class="additional-details">
<div class="mark-container">
<input type="checkbox" id="comp-80174649" value="80174649"
data-heading-code="2550"/>
...
1
vote
4answers
42 views
Mapping Boolean formulas to Python set expressions
Say I have a Boolean formula that uses a known set of tokens, e.g.:
Boolean operators: and, or, not
Grouping operators: (, )
Given a Boolean formula using those tokens, e.g.:
F: (A or B) and ...
1
vote
3answers
35 views
Group regex in python
I was trying a simple regex search to check for validity of an IPv6 address. I first tried a simple example for searching simple hex characters in a 4 block system.
For eg:
The string - ...
1
vote
4answers
64 views
List of compiled regexes in Python
I have a lot of substitution patterns which I need for text cleaning. I load the data from a database and compile the regular expressions before for performance reasons.
Unfortunately with my approach ...
0
votes
4answers
43 views
Check that a string starts with a drive letter in Python
I'm writing a script that will take a list of file paths as input. I want the script to make sure the strings in the input file are, or at least appear to be, valid full Windows paths, that include ...
0
votes
2answers
45 views
Python regex exact pattern
I am a beginner in regex using Python, what I am trying to do is including a ppattern that has to be found exactly as it is when searching for a regex. For example \w[$X|@] so if $X is not found ...
1
vote
1answer
35 views
Modifying a Regex Expression
i have several strings to match certain expressions where i want to match and extract 2 words after the prepositions along with the preps themselves.. And they do a good job too . But i need to modify ...
0
votes
0answers
16 views
Matching Multiple 'id' Values Using RegEx in Combination with HTML::TreeBuilder
The id values for particular span elements on multiple pages in my database have a regexable pattern. The id is something like
item_10Title_For_Project(SOMETHING HERE)Title_For_Project
I'd like to ...
1
vote
1answer
25 views
Regular expression match in python
I'm trying to extract a certain part of the text from a file.
I'm having trouble making the regular expression match the least number of characters as possible.
Here is an example text file.
...
0
votes
2answers
25 views
In python using Regex, how do I insert a string after a string with a close-parenthesis character?
I have lines of data like this:
(ABCD:0.00825830327156463345,(LKSDJF:0.00000254996576400768,SDFADS:0.00917039554517301569):0.16367666117488463562,OIUO:0.00401845774067355072):0.0;
...
0
votes
1answer
22 views
Python 2.7 regex with format multiple list items
Imagine I want to find all time expressions referring to 'AM' and 'PM' in a string. Let's ignore for the moment that I could use '[AP]M' to do this (because I'm actually pulling the list of valid ...
1
vote
2answers
33 views
regular expression to get string from text()
I have this html:
<p class="marB0">Phone:+97143396222<br>
Email:[email protected]</p>
And I want to get the phone number
I get the text like this:
...
3
votes
2answers
34 views
How to replace single qoute to backslash+single qoute in Python
Need to replace ' to \'
But that what I get:
>>> s = "It's nice to have an example"
>>> s.replace("'", "\\'")
"It\\'s nice to have an example"
>>> s.replace("'", "\'")
...
0
votes
2answers
30 views
How can I check for specific strings in python?
I'm used to doing Regex's in a variety of languages, but I don't know Python well.
I'm looking for a regex that will do the same as the following JavaScript regex:
(disc|dis|se|oti)(\d+)\W
i.e. ...
0
votes
3answers
45 views
Python regex to remove all occurances of [Number]
I'm looking for the regex statement in python that will remove all occurances of [1] or [17] or basically [*] from a string. The occurances are as follows where * equals some number:
[*]
[ * ]
[ *]
...
0
votes
3answers
22 views
regex + Python: How to find string with '?' in it?
I have a multi-line string in content variable, and I need to retreive all matches for a pattern uri containing question mark in it.
This is what I have so far:
content = """
/blog:text:Lorem ipsum ...
1
vote
0answers
44 views
All possible values that will match a regular expression [migrated]
This is a similar question to Reversing a regular expression in python, but I am looking for the set of all possible values that will match a regular expression pattern.
To avoid an infinite set of ...
-1
votes
1answer
24 views
How to use recursion in python to parse method body from java code?
I have a java code and i need to parse it in python.I am using regex in python for this purpose. I was successfully able to find method names , but to find method body i need to write regular ...
3
votes
1answer
47 views
output expanded ip list from text in python
I have text that contains IP and subnet data. I need to output each IP within a given range. The input looks like this:
10.14.21.23 0.0.0.0
20.54.0.0 0.0.127.255
30.76.21.0 0.0.0.255
...
0
votes
2answers
25 views
python regex for current time
I am having some trouble with regex it seems in creating a regex that matches time in the format "hh/mm/ss". I am making an alarm clock in python.
here's what I currently have:
import time, re
...
0
votes
2answers
24 views
How to use regex to parse a S3 bucket list of files - Python
I have the following method:
def scan_s3dir(dirname):
try:
cmd = "s3cmd ls {s3bucket} --recursive".format(s3bucket=dirname)
output = subprocess.check_output([cmd],
...
1
vote
2answers
17 views
Python - Regex - findall duplicates
I'm trying to match e-mails in html text using the following code in python
my_second_pat = '((\w+)( *?))(@|[aA][tT]|\([aA][tT]\))(((( *?)(\w+)( ...
0
votes
1answer
33 views
Assistance with regex python
I need help with a regex pattern that allows me to do the below but I'm not quite sure how to.
command, extra = re.search(SomeRegexPattern, string).groups() # or split it to be a list
Input: ...
1
vote
1answer
26 views
Filtering a dataframe based on a regex
Say I have a dataframe my_df with a column 'brand', I would like to drop any rows where brand is either toyota or bmw.
I thought the following would do it:
my_regex = ...
0
votes
1answer
31 views
Scrapy: Modify rules for scraping web page
I've started to use scrapy for a project of mine to scrape data off a tennis website. Here is an example page that I want to scrape data off. As you can see, I want to scrape data for a tennis player. ...
1
vote
1answer
40 views
Comparing regexes with recursion
So I'm stuck here trying to recursively compare regexes with recursion. The user will create an object with two parameters, each a string of length one. These strings can only be "0", "1" or "2". But ...
0
votes
1answer
17 views
Python parse url in string
I'd like to get urls in strings.
For example I got:
"You got to see this link[http://some.link/you/have?to=see]"
I think theses are non-valid url characters: "'()[]{}
2
votes
2answers
49 views
How can I match multiple elements enclosed in corner brackets with python regex?
I have some strings that look like this:
<a href="javascript:updateParent('higashino/index.html')">東野 圭吾「夢幻花」「白夜行」</a>他<br>
Now I want to extract the link and the strings inside ...
0
votes
2answers
56 views
regex is counting only one pattern, when two same patterns are kept consecutive.why?
The following is an input.
INPUT
2
businessman video demeanor demeanor dishonest acknowledge dvd honor sister opportunity
keen labour artistic favourite red definition impatient take ...
0
votes
2answers
32 views
python: match and group sets of similar strings in a loop
I am trying to match and group similar strings from a list but I'm not sure how to approach this.
I have the following list:
tablenames =[
'SCS_q104',
...
1
vote
1answer
26 views
find a keyword in a string with python and regex
I would like to find a keyword in a string that can be at the begining, the end, or anywhere in the string.
I started with something like that:
import re
my_keyword = "in ocean"
regex = ...
2
votes
2answers
27 views
Substitution of ACD|BCD like regular expression in python
A, B, C and D represent different parts of a regular expression.
The effect I want to achieve:
The input string is ACD or BCD. After substituting C with E, the output should be AED or BED.
The ...
0
votes
1answer
30 views
python get float numbers in reqular expression
I have the possibilities of these formats:
1,34$
1.34$
114$
0,34$
0.34$
and i want to get just the number .
i used this regular express
(\d+),(\d*)
but when i test it in 1,34$ i got two ...
1
vote
0answers
46 views
How to validate, store and execute user rules?
In my application:
there are users.
emails come in to the system.
users can use a web browser to define filter rules for their inbound emails.
Filter rules are of the general form "if field ...
1
vote
1answer
22 views
Regex to return 2 groups
I have the following data that I need to extract 2 groups from. I need the 3 letter code in caps between var and Destinations, and in the second group, I need all the 3 letter codes (without single ...
1
vote
0answers
27 views
creating a regular expression for parsing IUPAC organic compound names
I am trying to create a parser in my free time that could parse out all the functional groups from the name of a organic compound. Side by side, i am also trying to make a display program which can ...
0
votes
3answers
36 views
Conditioning on Regex,Python
i have several strings from which i need to extract the block numbers. The block numbers are of the format type "3rd block" , "pine block" ,"block 2" and "block no 4". Please note that is just the ...
0
votes
2answers
31 views
Use Regex to get text after /
I have this text from a website
<a class='link--wrapper' href='/china/sights/architecture/old-buildings'>
<a class='link--wrapper' ...
1
vote
1answer
26 views
Is this an efficient way of listing all .mp3 files inside in a directory (including eventual subdirectories) in Python?
Is this a good approach? Is there a more efficient way to do it (without having to trade code readability for efficiency) ?
for root, dirs, files in os.walk(path, topdown=False):
for name in ...
0
votes
3answers
41 views
Regex to find words between two tags
How can I use regex in python to find words between tags?
s = """<person>John</person>went to<location>London</location>"""
......
.......
print 'person of name:' John
print ...
0
votes
2answers
25 views
Regex: match fullstop and one word in python
I am new to regex. I wish to write a regex which matches a '.' followed by a whitespace followed by a word(which does not contain whitespace.
For example, in the string "The sound of cracking. ...
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