It performs searching, editing, and replacing in a text file. It is also used to replace the contents within a file. For using FileInput, fileinput module is imported. Text_pattern = re.compile(re.escape(text), flags)įile_contents = text_pattern.sub(subs, file_contents)įileInput is a useful feature of Python for performing various file-related operations. #importing the regex moduleĭef replace(filePath, text, subs, flags=0): Sub() - It is used to replace a pattern with a string. Inside the function, we open the file in both read and write mode and read the contents of the file.Ĭompile() - It is used to compile a regular expression pattern and convert it into a regular expression object which can then be used for matching.Įscape() - It is used to escape special characters in a pattern. It creates a function and passed a file, an old string, and a new string as arguments. New_line = stripped_line.replace("Ghost", "Ghostbusters")Įxample: Replace a Text using Regex ModuleĪn alternative method to the above-mentioned methods is to use Python’s regex module. Open(file,'w') - It opens the file for writing and overwrites the old file content with new content. Replace(old,new) - It takes an old string and a new string to replace its arguments.įile.close() - After concatenating the new string and adding an end-line break, it closes the file. Strip() - While iterating over the contents of the file, strip() function strips the end-line break. Open(file,'r') - It opens the review.txt file for reading the contents of the file. It searches for the string by using for loop and replaces the old string with a new string. We use the review.txt file to modify the contents. The below example uses replace() function to modify a string within a file. Example: Use replace() to Replace a Text within a File Indeed, the film as it stands frequently allows time to pass without a gagīut then comes the punch line: the characters are funnyĪnd because we’ve been hooked by the story, the humor the characters provide is all the richer. The paramal hordes makes a compelling setup for a big-budget adventure of any stripe The notion of a ghost-extermination squad taking on
#Regex replace python movie#
The movie would still work played perfectly straight The joke is built on a rock-solid boundation We will use the below review.text file to modify the contents.
Let us discuss some of the mentioned ways to search and replace text in a file in Python. This will replace all the matching texts within a file and decreases the overhead of changing each word. Instead of creating a new modified file, we will search a text from a file and replace it with some other text in the same file.
Python provides multiple built-in functions to perform file handling operations. We will replace text, or strings within a file using mentioned ways. We will use some built-in functions and some custom codes as well. In this article, we will learn to search and replace a text of a file in Python.
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