Python string method replace() returns a copy of the string in which the occurrences of old have been replaced with new, optionally restricting the number of replacements to max.. Syntax. Definition and Usage The replace () method replaces a specified phrase with another specified phrase. Python is most suitable for web development, Artificial Intelligence, Machine learning, Data analytics, Enterprise resource planning development. str.replace(old, new[, max]) Parameters. On the other hand, JavaScript is predominately used for Web and ERP development. I am beginner in python and want to learn how to replace text from different files. It is the most preferred language for data science and numerical handling. I know how to do it basic, but need help with this: I have 3 files main.txt, names.txt and number.txt. This method has the following syntax: # Python's String Replace Function python_string.replace(old_str, new_str, count) Parameters: old_str => Old string to be replaced new_str => New string used for substitution count => Replacement counter Returns: Returns a copy of the old string with the new after replacment. Versatility. Description. to “replace” the new substring with the existing substring in the specified string Following is the syntax for replace() method −. names.txt looks like this: Anna Smith Bob Jhon number.txt looks like this: 1-522-223 1-523-232 1-593-573 1-322-242 Note: All occurrences of the specified phrase will be replaced, if nothing else is specified.

Python String Replace Function.