Tagged Questions

102
votes
15answers
25k views

Is it worth using Python's re.compile?

Is there any benefit in using compile for regular expressions in Python? h = re.compile('hello') h.match('hello world') vs re.match('hello', 'hello world')
86
votes
10answers
29k views

Split a string by spaces — preserving quoted substrings — in Python

I have a string which is like this: this is "a test" I'm trying to write something in Python to split it up by space while ignoring spaces within quotes. The result I'm looking for is: ...
14
votes
5answers
2k views

Type of compiled regex object in python

What is the type of the compiled regular expression in python? In particular, I want to evaluate isinstance(re.compile(''), ???) to be true, for introspection purposes. One solution I had was, ...
11
votes
6answers
12k views

How to input a regex in string.replace in python?

I need some help on declaring a regex. My inputs are like the following: this is a paragraph with<[1> in between</[1> and then there are cases ... where the<[99> number ranges from ...
2
votes
1answer
317 views

regular expression \Z(?ms)

What does \Z(?ms) mean in a regular expression? \Z is end-of-string, but what is the (?ms) part? This is added by fnmatch.translate("abc") to the returned regular expression.
2
votes
3answers
296 views

string convert with python re

I get a string line: >>> line = " abc\n def\n\n ghi\n jkl" >>> print line abc def ghi jkl and I want to convert it to "abcdef\n\n ghijkl", like: >>> print ...
1
vote
3answers
7k views

Python regex search - 'wild card' matching a string

thought i would write some quick code to download the number of 'fans' a page had of fb, just b/c i thought would be interested to get a handle on the regex search in python. for some reason despite ...
1
vote
2answers
31 views

regex match and replace multiple patterns

I have a situation where a user submits an address and I have to replace user inputs to my keys. I can join this using an address without suffixes. COVERED WAGON TRAIL CHISHOLM TRAIL LAKE TRAIL ...
1
vote
3answers
5k views

Python finding substring between certain characters using regex and replace()

Suppose I have a string with lots of random stuff in it like the following: strJunk ="asdf2adsf29Value=five&lakl23ljk43asdldl" And I'm interested in obtaining the substring sitting between ...
1
vote
3answers
511 views

Python: Export entire regex group to text file

When I print the group "print(a)" the entire group is shown. When I save it to a text file "open("sirs1.txt", "w").write(a)" only the last row is saved to the file. import re def main(): f = ...
1
vote
1answer
34 views

CSV read/write using regex re.sub

I'd like to read a CSV file and recompile using: re.sub('\s+(STREET|ST|TRAIL|TRL|TR)\s*$', '', test_file, flags=re.M) I'm getting: TypeError: expected string or buffer When using: import csv ...
0
votes
2answers
43 views

Python parentheses and returning only certain part of regex

I have a list of strings that I'm looping through. I have the following regular expression (item is the string I'm looping through at any given moment): regularexpression = re.compile(r'set(\d+)e', ...
0
votes
2answers
29 views

Find sublist of strings that match a regex that requires ordered inclusion from another list

Say I have a list lst with dozens of thousands of strings. Say also that I have a list of strings strings_to_match, e.g.: strings_to_match = ['foo', 'bar', 'hello'] I would like to find strings ...
0
votes
4answers
30 views

Extract java script from html document using regular expression

I am trying to extract java script from google.com using regular expression. Program import urllib import re gdoc = urllib.urlopen('http://google.com').read() scriptlis = ...
0
votes
1answer
43 views

reading $, . and number in python regex

I want to be able to read the price in a given line, for example: $.0001 ... I'm trying to read the just the $.0001 part with the following regex: new_string = re.search(r'\$([.]\d+)', ...

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