![]() ![]() How to grep for multiple strings in the same line inside a file with similar pattern 0. Bash script to search multiple strings in text file. If all(re.search(r, line) for r in regexarr):į2.write(line) # write only the matching lines to file2.txtį3.write(line) # write non-matching lines to file3. how to use -v option for multiple strings together. Open('file2.txt', 'a+') as f2, \ # open file2.txt and file3.txt immediatelyįor line in f1: # iterate over file1.txt contents line by line ![]() Hence, fixing all that, here is one way to simulate your grep: regexarr = like so: grep -l 'boo' An option more useful for searching through non-code files is -i, ignore case. Heres one approach: grep -e 'Hello123' -e 'Halo123' -e 'Gracias' -e 'Thank you' listoffilestosearch. However, there a number of ways to achieve what youre trying to accomplish. This is useful if you are searching through multiple files for the same string. You should probably look at the manpage for grep to get a better understanding of what options are supported by the grep utility. The two commands, ls and grep, can be piped together to filter out the. Lastly, your regex would match any instead of all of the listed values as chained/piped grep does (the first grep filters lines on value1, the second filters on value2 previously filtered lines etc.). grep -c 'boo' afile 4 The -l option prints only the filenames of files in the query that have lines that match the search string. If found, grep displays the entire contents of the folder where the string was found. In other words, running multiple grep in one line. This is super effective, especially if you are simultaneously. Last Updated Grep is a command line utility useful for many text-based search tasks, including searching for two or more strings or regular expressions. I want to replicate the same functionality in Python. Minimal example: compile patterns re <- re2r::re2 (keywords) match strings re2r::re2detect (strings, re, parallel TRUE) To expand on the other answer, to transform the sapply () output into a useful logical vector you need to further use an apply () step. The grep command is used to find the information in any file or directory you are looking for. grep -E value1 file1.txt grep value2 grep value3 grep value3 The above command is grepping for all those variables from file.txt and based on the result writing a line in file1 else will write the line in file2. ![]() Second, file1.read() effectively reads the whole file1.txt while doing a check (and unlike grep you're not doing it line-by-line) so any subsequent attempts to read it would return an empty result including if you attempt to write its contents to another file. re2r package can match multiple patterns (in parallel). First of all, you're not iterating over your file1.txt line by line so I don't know where are you getting the eachline from. ![]()
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