Python 3 7 replace string method
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python 3.7 introduced a new method called `str.replace()` which is used to replace occurrences of a specified substring within a string with another substring. this method is very useful when you need to modify a string by replacing one or more parts of it with new values.
here is a tutorial on how to use the `str.replace()` method in python 3.7:
1. syntax:
the syntax of the `str.replace()` method is as follows:
`old_string` is the original string that you want to modify.
`old_substring` is the substring that you want to replace in the original string.
`new_substring` is the substring that will replace the occurrences of `old_substring`.
`count` is an optional parameter that specifies the maximum number of replacements to make. if not specified, all occurrences of `old_substring` will be replaced.
2. example:
here is an example demonstrating the use of the `str.replace()` method in python 3.7:
output:
in this example, we have an original string "hello, world! hello, python!". we use the `replace()` method to replace all occurrences of "hello" with "hi", resulting in the modified string "hi, world! hi, python!".
3. case insensitive replacement:
if you want to perform a case-insensitive replacement, you can combine the `str.lower()` method with the `str.replace()` method like this:
this will replace all occurrences of `old_substring` in a case-insensitive manner.
overall, the `str.replace()` method in python 3.7 is a powerful tool for modifying strings by replacing specific substrings. it offers flexibility and ease of use when working with string manipulation tasks in python.
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