To write something to a file or to read the content of a file in Python it is required to open() and close() the file properly.
The best practice in Python is to read/write to a file by using the with statement – the replacement for commonly used try...finally error-handling statements.
The with statement ensures that the file is closed when the block inside it is exited.
This note shows the best practice Python examples of how to write to a file or read the file’s content and save it to a variable.
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Write to a File in Python
To append something to a file, use the code snippet as follows:
with open('file.txt', 'a') as f:
f.write("Something\n")
To write something to a file with truncation:
with open('file.txt', 'w') as f:
f.write("Something\n")
Read from a File in Python
To read the content of a file, save it to a variable and print:
with open('file.txt', 'r') as f:
output = f.read()
print(output)