![]() You specify how many occurrences of the existing substring are to be replaced with the count argument of the method. ![]() The replace method replaces an existing substring in a string with a new substring. Updated_username = user_input.replace(" ", "-")įrom the result of the replace method, you can see that the whitespaces have been replaced with hyphens which meets your standard. Here's how to do that: user_input = "python my favorite" You can use the replace method to replace the whitespaces in the submitted strings with a hyphen. Let's say, for example, you want users to enter their usernames but you don't want the whitespace character in the username input. When to Use the replace Method in PythonĪ good use case of this method is to replace characters in a user's input to fit some standard. The remaining "JavaScript"s stays untouched. I prefer JavaScript to Python because JavaScript looks more beautifulīy applying a count argument of 1, you can see that only the first "JavaScript" (the first occurrence) is replaced with "PHP". New_str = str.replace("JavaScript", "PHP", 1) I prefer JavaScript to Python because JavaScript looks more beautiful" What if you wanted only one occurrence to be replaced? Then you can use the count argument like this: str = "I love JavaScript. If False, treats the pattern as a literal string Cannot be set to. In this example, the three occurrences of "JavaScript" are replaced with "PHP". If True, assumes the passed-in pattern is a regular expression. Syntax Following is the syntax for replace () method str.replace (old, new, max) Parameters old This is old substring to be replaced. You can see how the replace method replaces the "JavaScript" occurences with "PHP". 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. I prefer PHP to Python because PHP looks more beautiful New_str = str.replace("JavaScript", "PHP") If optional argument count is provided, then only first count occurrences are replaced. The new string is a copy of the original string with all occurrences of substring old replaced by new. Here's an example that replaces "JavaScript" with "PHP" in a string: str = "I love JavaScript. Python String replace () function syntax is: str.replace (old, new, count) The original string remains unmodified. If this is not specified, all occurrences of the old_char will be replaced with the new_char. The count argument, which is optional, specifies how many occurrences will be replaced. The new_char argument is the set of characters that replaces the old_char. The old_char argument is the set of characters to be replaced. The syntax of the replace method is: string.replace(old_char, new_char, count) The original string is not affected or modified. The replace string method returns a new string with some characters from the original string replaced with new ones. In this article, I'll show you how this method can be used to replace a character in a string. Python has numerous string modifying methods, and one of them is the replace method.
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