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I'm using Python to open a text document:

text_file = open("Output.txt", "w")

text_file.write("Purchase Amount: " 'TotalAmount') text_file.close()

I want to substitute the value of a string variable TotalAmount into the text document. Can someone please let me know how to do this?

1 Answer

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 For the version Python2.6, it's preferred to use str.format()method:-

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

If you are using Python2.7 and higher versions you can use {} instead of {0} which we have used in Python 2.6:-

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

If you are working with Python3.6 then you will have to use f-string which is introduced in Python3.6:-

with open("Output.txt", "w") as text_file:

print(f"Purchase Amount: {TotalAmount}", file=text_file)

To know more about this you can have a look at the following video tutorial:-

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