How Can I Write Strings to Text Files in Python?

Writing Strings to Text Files in Python

In Python, you can write the value of a string variable, such as TotalAmount, into a text document. Here's how:

Using a context manager ensures that the file is always closed:

with open("Output.txt", "w") as text_file:
    text_file.write("Purchase Amount: %s" % TotalAmount)

If you're using Python2.6 or higher, use str.format():

with open("Output.txt", "w") as text_file:
    text_file.write("Purchase Amount: {0}".format(TotalAmount))

In Python2.7 and higher, use {0} or {}:

with open("Output.txt", "w") as text_file:
    text_file.write("Purchase Amount: {}".format(TotalAmount))

In Python3, use the optional file parameter with print():

with open("Output.txt", "w") as text_file:
    print("Purchase Amount: {}".format(TotalAmount), file=text_file)

Or, use f-strings in Python3.6:

with open("Output.txt", "w") as text_file:
    print(f"Purchase Amount: {TotalAmount}", file=text_file)

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