Python Project Series #41: String Exercises in Python
In Python, a string is an immutable sequence of characters enclosed in either single ('), double (") or triple (''' or """) quotes. Strings support various operations, including concatenation (+), repetition (*), and slicing ([]). Python provides built-in string methods such as .lower(), .upper(), .strip(), .replace(), and .split() for manipulation. Strings are iterable, allowing character-wise iteration using loops.
Python strings support formatting, such as f-strings (f"{var}"), .format(), and the % operator. Indexing allows accessing individual characters (s[0] for the first character), while slicing (s[1:4]) extracts substrings. Negative indexing (s[-1]) accesses elements from the end.
The len() function returns the string length, and membership tests can be performed using in ("abc" in s). Escape characters like \n (newline) and \t (tab) modify output formatting.
Since strings are immutable, modifications create new strings rather than changing existing ones. However, ''.join() efficiently concatenates multiple strings. Regular expressions (re module) allow advanced pattern matching.
Strings can be encoded and decoded using .encode() and .decode(), supporting various encodings like UTF-8. Python also provides multi-line string handling using triple quotes. String interpolation and f-strings simplify dynamic text formatting, improving readability and performance.
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00:00 Introduction
00:15 Coding exercise
04:20 Results
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