In this tutorial, you’ll learn how to check the end of a line in a file using Python. This skill can be useful when parsing and extracting information from structured text files and ensuring that the reading process is accurate.
Step 1: Create a Sample Text File
Create a sample text file called example.txt
with the following content:
This is line 1.
This is line 2.
This is line 3.
End of file.
Step 2: Open the Text File in Python
Open the example.txt
file in Python using the open()
function. The syntax of the open()
function is:
1 |
file = open(file, mode='r', buffering=-1, encoding=None, errors=None, newline=None, closefd=True, opener=None) |
For this tutorial, you’ll only need the file
and mode
parameters. Open the file in read mode (mode='r'
). Replace file
with the path of your file.
1 |
file = open('example.txt', mode='r') |
Step 3: Read the File Line by Line
Now, you can read the file line by line using a for
loop, as shown below:
1 2 3 |
with open('example.txt', 'r') as file: for line in file: print(line.strip()) |
Step 4: Check the End of Line Character
You can check whether the current line is the last line by checking the EOL character. Here’s how you can do this:
1 2 3 4 5 6 7 8 9 |
eol = '\n' with open('example.txt', 'r') as file: for line in file: if line.endswith(eol): print(f'Line: {line.strip()} does end with the EOL character.') else: print(line.strip()) |
The output of the script should look like this:
Line: This is line 1. does end with the EOL character. Line: This is line 2. does end with the EOL character. Line: This is line 3. does end with the EOL character. End of file.
Conclusion
In this tutorial, you’ve learned how to check the end of a line in a file using Python. This skill can be useful when parsing and extracting information from structured text files and ensuring that the reading process is accurate.
As you work with different text files, you may need to adjust the EOL character according to the operating system you are using.