Learn Python
- Python basic
- Introduction to File Handling
- Basics of List Comprehension
- Introduction to Matplotlib
- Classes and Objects
- Introduction to Functions
- Python Numbers
- Creating Basic Plots
- Opening and closing files
- Function parameters and arguments
- Advanced Techniques
- Attributes and Methods
- Python Strings
- Scope and lifetime of variables
- Advanced Plotting
- Reading from files
- Performance and Limitations
- Encapsulation
- Python List
- Specialized Plots
- Writing to files
- Return statement and output
- Inheritance
- Python Tuple
- Advanced Customization
- Working with different file formats
- Lambda Functions
- Polymorphism
- Python Sets
- File management operations
Python List
Splitting and joining
Joining and splitting are commonly used operations for manipulating strings and lists.
1. Joining a list into a string:
Joining is the process of combining a list of strings into a single string. We use the .join() method, where the list elements are concatenated, and a specified delimiter is placed between them.
Example 1: joining with spaces
1. Joining a list into a string:
Joining is the process of combining a list of strings into a single string. We use the .join() method, where the list elements are concatenated, and a specified delimiter is placed between them.
Example 1: joining with spaces
words = ['Hello', 'world', 'in', 'Python'] sentence = ' '.join(words) print(sentence) # Output: "Hello world in Python"
In this case, we have a list ['Hello', 'world', 'in', 'Python']. We use ' '.join() to combine the list elements into a string, and the delimiter between each word is a space (' ').
Example 2: joining with commas and space
fruits = ['apple', 'banana', 'cherry'] result = ', '.join(fruits) print(result) # Output: "apple, banana, cherry"
Here, the list of fruits is joined into a single string with "," (comma followed by space) as the delimiter.
2. Splitting a string into a list:
Splitting takes a string and breaks it into a list of substrings based on a specified delimiter. The .split() method is used for this.
Example 1: splitting by spaces (default behavior)
sentence = "Python is amazing" words = sentence.split() print(words) # Output: ['Python', 'is', 'amazing']
In this example, we take a sentence and split it into a list of words by default using spaces as the delimiter.
Example 2: splitting by commas
data = "apple,banana,cherry"
fruits = data.split(',')
print(fruits) # Output: ['apple', 'banana', 'cherry']Here, the string is split into a list of fruits using "," (comma) as the delimiter.
Summary:
- Joining: Combine a list of strings into a single string using a specified delimiter with delimiter.join(list).
- Splitting: Convert a string into a list of substrings using a specified delimiter with string.split(delimiter).
- These methods work together to manipulate and organize text data efficiently.
It's time to take a quiz!
Test your knowledge and see what you've just learned.
What is the output of the following code: words = ["Hello", "world", "in", "Python"]; " ".join(words)?
AHello world in Python
BHello world in Python
CHello, world, in, Python
DHello/world/in/Python
Check Answer
Which method is used to join a list of strings with a comma as a delimiter?
Asplit()
Bjoin()
Cconcat()
Dmerge()
Check Answer
What will be the output of the following code: sentence = "Python is amazing"; sentence.split()?
A['Python', 'is', 'amazing']
B['Python is amazing']
C['Python', 'is amazing']
D['Python', 'is', 'amazing', '']
Check Answer
How would you split the string "apple,banana,cherry" into a list of fruits?
Check Answer
What does the .join() method do?
ASplits a string into a list
BJoins a list into a string
CCounts the number of elements
DReverses the order of a string
Check Answer