In Python, writing to a file can be done using the open() function with a write mode. Here are the common methods to write data to a file:
Writing Text to a File
To write text data to a file, use the "w" mode (write mode). This will overwrite the file if it already
with open("filename.txt", "w") as file:
file.write("Hello, World!")
"filename.txt": The name of the file you want to write to.
"w": Opens the file in write mode. If the file exists, it will be overwritten; if it doesn’t exist, a new file is created.
file.write(): Writes a string to the file.
Appending Text to a File
To add data to the end of an existing file without overwriting it, use the "a" mode (append mode).
with open("filename.txt", "a") as file:
file.write("\nAppending this line to the file.")
"a": Opens the file in append mode, adding content to the end of the file without erasing existing data.
Writing Multiple Lines to a File
To write multiple lines at once, you can use writelines(). You need to provide a list of strings, where each string represents a line.
lines = ["First line\n", "Second line\n", "Third line\n"]
with open("filename.txt", "w") as file:
file.writelines(lines)
Writing with Path from pathlib (Python 3.4+)
Using the write_text() method from pathlib provides a convenient way to write text data.
from pathlib import Path
Path("filename.txt").write_text("This is written with pathlib!")