extract substring from string python

Опубликовано: 30 Январь 2024
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In Python, extracting substrings from a string is a common operation. Whether you want to retrieve a portion of text based on specific criteria or split a string into smaller parts, Python provides various methods to achieve this. In this tutorial, we'll explore different techniques for extracting substrings from strings with practical code examples.
String slicing is a straightforward and efficient way to extract substrings in Python. The syntax for string slicing is string[start:stop], where start is the index of the beginning of the substring, and stop is the index of the end (exclusive).
Output:
In this example, we extracted the substring "World" from the original string "Hello, World!" by specifying the start and stop indices.
The split() method is useful when you want to break a string into parts based on a delimiter. You can then access the desired substring using the resulting list.
Output:
In this example, we split the sentence into a list of words using split(), and then accessed the fourth word ("powerful") as our substring.
Regular expressions provide a powerful and flexible way to match and extract substrings based on patterns. The re module in Python enables us to work with regular expressions.
Output:
In this example, the regular expression \b[A-Z]{3}\d{3}\b is used to match a three-letter code followed by three digits. The search() method returns a match object, and group() retrieves the matched substring.
These are just a few examples of how you can extract substrings from strings in Python. Depending on your specific use case, you may choose the method that best suits your needs. Experiment with these techniques and incorporate them into your Python projects to efficiently handle string manipulation tasks.
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