Python Strings and Their Methods…
A String in a Python is a sequence of characters enclosed in single, double, or triple quotes . Strings are immutable and support a wide range of useful methods.(such as "Hello, World!" or '12345').
Python String Methods : String methods are built-in functions designed to inspect, modify, or format text data.
1 > Case Conversion: These methods alter the letter casing across a string.
A) Lower(): Converts all the characters to lower case.
B) Upper(): Converts al the characters to upper case.
C) Title(): Capitalizes the first letter of every word.
D) Capitalize(): Capitalizes only the first character of the string.
E) Swapcase(): Inverts lowercase character to uppercase character and vise versa.
2> Search and Count: These methods are to locate specific characters (or) count their occurrences.
A) Find(): Returns the lowest index where substring is found; returns [-1] when not found.
B) Index(): same as find(), but raises a value error if the substring is missing.
c) Count(): Returns the total number of substring present in a string.
3> Cleaning / Whitespace Handling: Removes characters from starting and ending of the string.
A) Strip(): Removes leading and tailing whitespace or special characters.
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B) Lstrip(): Removes the whitespace or character only on the left side.
C) Rstrip(): Removes the whitespace or character only on the right side.
4> Modify & Replace: Replace all character of a target substring with a new one .
5>Split Methods: Essential for converting between strings & list of substring.
A) Split(sep): Breaks a string into a list using delimiter(,).
B) Split(sep, maxslpit): Maximum number of splits to perform.
C) Rsplit(sep): Splits from the right side of the string.
6> Partition(): Searches for the last occurrence of the delimiter from left and performs a single split. It also returns a tuple of 3 elements: (before_sep, sep, after_sep).
A) Rpartition(): Finds the last match from the right side of a string.
Quick Reference;
- Strings are immutable.
- Indexing starts from 0.
- These methods helps in cleaning, searching, modifying, and analyzing text efficiently.
- Mastering strings is the key to python program!
