Getting a substring from a given string is called String slicing in Python. A simple way to do this is to use the simple slicing operator.
Python string slicing can be done in two ways.
- slice() Constructor
- Extending Indexing
Example String slicing in Python
A simple example code demonstrates string slicing.
Using slice() Constructor
Use slice notation (start, stop, step).
String = 'HELLO'
# Using slice constructor
s1 = slice(3)
s2 = slice(1, 5, 2)
s3 = slice(-1, -12, -2)
print(String[s1])
print(String[s2])
print(String[s3])Output:
Extending indexing
string[start:end:step]start end and step have the same mechanism as the slice() constructor.
String = 'HELLO'
print(String[:3])
print(String[1:5:2])
print(String[-1:-12:-2])Output:
HEL
EL
OLH
Slice From the Start
Don’t use the start index, the range will start at the first character. Get the characters from the start to position 5 (not included):
b = "Hello, World!"
print(b[:5])Output: Hello
Slice To the End
Don’t use the end index, the range will go to the end. Get the characters from position 6, and all the way to the end:
b = "Hello, World!"
print(b[6:])Output: World!
Do comment if you have any doubts or suggestions on this Python slicing topic.
Note: IDE: PyCharm 2021.3.3 (Community Edition)
Windows 10
Python 3.10.1
All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.