Latest recipes tagged "replace"

Recursive find replace in files using regex (Python)

2016-04-28T13:24:15-07:00

Python recipe 580653 by ccpizza (files, regex, replace, search). Revision 5.

Recursively find and replace text in files under a specific folder with preview of changed data in dry-run mode

Example Usage

See what is going to change (dry run):

find_replace.py --dir project/myfolder --search-regex "\d{4}-\d{2}-\d{2}" --replace-regex "2012-12-12" --dryrun

Do actual replacement:

find_replace.py --dir project/myfolder --search-regex "\d{4}-\d{2}-\d{2}" --replace-regex "2012-12-12"

Do actual replacement and create backup files:

find_replace.py --dir project/myfolder --search-regex "\d{4}-\d{2}-\d{2}" --replace-regex "2012-12-12" --create-backup

Same action as previous command with short-hand syntax:

find_replace.py -d project/myfolder -s "\d{4}-\d{2}-\d{2}" -r "2012-12-12" -b

Output of find_replace.py -h:

DESCRIPTION:
    Find and replace recursively from the given folder using regular expressions

optional arguments:
  -h, --help            show this help message and exit
  --dir DIR, -d DIR     folder to search in; by default current folder
  --search-regex SEARCH_REGEX, -s SEARCH_REGEX
                        search regex
  --replace-regex REPLACE_REGEX, -r REPLACE_REGEX
                        replacement regex
  --glob GLOB, -g GLOB  glob pattern, i.e. *.html
  --dryrun, -dr         don't replace anything just show what is going to be
                        done
  --create-backup, -b   Create backup files

USAGE:
   find_replace.py -d [my_folder] -s <search_regex> -r <replace_regex> -g [glob_pattern]

generates a set of binary files by doing ASCII replacements on a master binary file, controlled by a csv file (Python)

2015-09-16T16:25:49-07:00

Python recipe 579099 by Antoni Gual (ascii, files, python3, replace).

A hack that saved me a lot of time. Well perhaps not so much, but it was funnier than to do it manually.

Recursive find and replace in all files in directory with regex (Python)

2013-03-21T12:33:44-07:00

Python recipe 578312 by ccpizza (directory, recursion, regular_expressions, replace).

Search and replace files recursively in a given directory. Accepts regular expressions as search and replacement patterns.

Example usage:

python find_replace_regex.py ".", "<span[^>]*>", "<div>", "*.html" backup

Note: On win32 the < and > symbols are interpreted by the shell as input/output redirection even when they are surrounded with single or double quotes, and therefore need to be escaped with the caret character ^.

Context manager to atomically replace a file (Python)

2012-06-17T12:09:49-07:00

Python recipe 578166 by Oren Tirosh (atomic, contextmanager, file, replace). Revision 3.

This context manager ensures that a file's content is either replaced atomically with new contents or left unchanged. An exception or other error will not leave it empty or with partial content.

For Characters in a String, Replace with Character (Python)

2012-03-23T20:44:23-07:00

Python recipe 578086 by Andrew Yurisich (character, replace, substitute, text). Revision 9.

Useful if you need to replace many different characters with all of the same character. Can accept an unlimited number of request to replace.

Does not work with words, only characters. You can, however, replace single characters with words. I may go back and re-implement it using tuples for the keys, but this would make searching the text for any matches pretty expensive, I'd imagine. At that point, it's mostly a job for a regex, and those tools already exist.

C# String.Replace with a char array (Java)

2010-12-24T09:58:35-08:00

Java recipe 577516 by John Hurliman (csharp, replace, string).

Takes a string and replaces all characters matching a given array with a given string

Improved range function (Python)

2010-06-07T01:50:20-07:00

Python recipe 577256 by Sunjay Varma (float, python, range, replace). Revision 2.

While using the built-in range function a while ago. I found an odd (perhaps bug) where the range function couldn't use float steps. I am not sure if that was intended for simplicity or not, but I wrote my own range function that goes beyond that anyway.

lreplace() and rreplace(): Replace the beginning and ends of a strings (Python)

2010-06-04T02:18:48-07:00

Python recipe 577252 by Dan McDougall (regex, replace, string).

Python newbies will often make the following mistake (I certainly have =):

>>> test = """this is a test:
... tis the season for mistakes."""
>>> for line in test.split('\n'):
...     print line.lstrip('this')
... 
 is a test
 the season for mistakes.

The mistake is assuming that lstrip() (or rstrip()) strips a string (whole) when it actually strips all of the provided characters in the given string. Python actually comes with no function to strip a string from the left-hand or right-hand side of a string so I wrote this (very simple) recipe to solve that problem. Here's the usage:

>>> test = """this is a test:
... tis the season for mistakes."""
>>> for line in test.split('\n'):
...     print lreplace('this', '', line)
... 
 is a test
tis the season for mistakes.

I really wish Python had these functions built into the string object. I think it would be a useful addition to the standard library. It would also be nicer to type this:

line.lreplace('this', '')

Instead of this:

lreplace('this','',line)

REAL case insensitive string replace (Python)

2009-04-25T15:48:50-07:00

Python recipe 576715 by Jonas Haag (case, case_insensitive, replace, str). Revision 2.

REAL case insensitive version of str.replace that keeps the letter case of the original expression (Doesn't only replace Foo and foo to ...foo... but to ...Foo.. and ...foo...).