Ex16 Drill 3 Question

#1

Hey,
Currently reading “Learn Python 3 The Hard Way”.
I am on ex16 and the 3rd study drill says:
image

I am not sure if target.write() can print out, but from what I see it only accepts one argument,
so I am guessing I need to pass it a variable as a parameter.

The way I made this work was like this:

bundle = line1 + "\n" + line2 + "\n" + line3 + "\n"
# writes the strings in the 3 vars to the opened file
target.write(bundle)

However I don’t think that’s the intended solution since this has nothing to do
with formats. However when I tried to pass a print function to target.write
it didn’t work so I couldn’t figure out a different way to do it.

Can you give me some hints on how the author originally intended for this to be solved?
thanks.

#2

You could do

target.write(f"{line1}\n{line2}\n{line3}")

if you insist on using string formatting.

But I think your solution is fine and it can easily be changed to deal with the general case where you need to write an arbitrary number of lines to the file:

# let lines be a list of lines
bundle = "\n".join(lines)
target.write(bundle)
#3

But if .write only accepts one argument, then how does it accept all these vars? Is the whole formatted string considered one argument?

#4

Yes.

(“Post must be at least 20 characters” and quotes don’t count! Really?!)

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