Python String Methods
Python string is a sequence of Unicode characters that is enclosed in the quotations marks. In this article, we will discuss the in-built function i.e. the functions provided by the Python to operate on strings.
Note: Every string method does not change the original string instead returns a new string with the changed attributes.
Case Changing of Strings
The below functions are used to change the case of the strings.
- lower(): Converts all uppercase characters in a string into lowercase
- upper(): Converts all lowercase characters in a string into uppercase
- title(): Convert string to title case
- swapcase(): Swap the cases of all characters in a string
Example: Changing the case of Python Strings.
Python3
# Python3 program to show the# working of upper() functiontext = 'geeKs For geEkS'# upper() function to convert# string to upper caseprint("\nConverted String:")print(text.upper())# lower() function to convert# string to lower caseprint("\nConverted String:")print(text.lower())# converts the first character to# upper case and rest to lower caseprint("\nConverted String:")print(text.title())#swaps the case of all characters in the string# upper case character to lowercase and viceversaprint("\nConverted String:")print(text.swapcase())# original string never changesprint("\nOriginal String")print(text) |
Output
Converted String: GEEKS FOR GEEKS Converted String: geeks for geeks Converted String: Geeks For Geeks Converted String: GEEkS fOR GEeKs Original String geeKs For geEkS
Time complexity: O(n) where n is the length of the string ‘text’.
Auxiliary space: O(1).
Table of Python String Methods
| Function Name | Description |
|---|---|
| capitalize() | Converts the first character of the string to a capital (uppercase) letter |
| casefold() | Implements caseless string matching |
| center() | Pad the string with the specified character. |
| count() | Returns the number of occurrences of a substring in the string. |
| encode() | Encodes strings with the specified encoded scheme |
| endswith() | Returns “True” if a string ends with the given suffix |
| expandtabs() | Specifies the amount of space to be substituted with the “\t” symbol in the string |
| find() | Returns the lowest index of the substring if it is found |
| format() | Formats the string for printing it to console |
| format_map() | Formats specified values in a string using a dictionary |
| index() | Returns the position of the first occurrence of a substring in a string |
| isalnum() | Checks whether all the characters in a given string is alphanumeric or not |
| isalpha() | Returns “True” if all characters in the string are alphabets |
| isdecimal() | Returns true if all characters in a string are decimal |
| isdigit() | Returns “True” if all characters in the string are digits |
| isidentifier() | Check whether a string is a valid identifier or not |
| islower() | Checks if all characters in the string are lowercase |
| isnumeric() | Returns “True” if all characters in the string are numeric characters |
| isprintable() | Returns “True” if all characters in the string are printable or the string is empty |
| isspace() | Returns “True” if all characters in the string are whitespace characters |
| istitle() | Returns “True” if the string is a title cased string |
| isupper() | Checks if all characters in the string are uppercase |
| join() | Returns a concatenated String |
| ljust() | Left aligns the string according to the width specified |
| lower() | Converts all uppercase characters in a string into lowercase |
| lstrip() | Returns the string with leading characters removed |
| maketrans() | Returns a translation table |
| partition() | Splits the string at the first occurrence of the separator |
| replace() | Replaces all occurrences of a substring with another substring |
| rfind() | Returns the highest index of the substring |
| rindex() | Returns the highest index of the substring inside the string |
| rjust() | Right aligns the string according to the width specified |
| rpartition() | Split the given string into three parts |
| rsplit() | Split the string from the right by the specified separator |
| rstrip() | Removes trailing characters |
| splitlines() | Split the lines at line boundaries |
| startswith() | Returns “True” if a string starts with the given prefix |
| strip() | Returns the string with both leading and trailing characters |
| swapcase() | Converts all uppercase characters to lowercase and vice versa |
| title() | Convert string to title case |
| translate() | Modify string according to given translation mappings |
| upper() | Converts all lowercase characters in a string into uppercase |
| zfill() | Returns a copy of the string with ‘0’ characters padded to the left side of the string |
Note: For more information about Python Strings, refer to Python String Tutorial.
Please Login to comment...