Convert a tuple of floats and text to one line
I am trying to convert a tuple of 2 floats and 3 pieces of text to one line, so I can use it in a .write () file because it does not accept tuples.
testr = 'you went' ,speed ,'mph and stopped in' ,stop ,'meters'
test = open('testresults.txt' ,'w')
test.write(testr)
test.close()
whenever i try to run the program it gives me this
test.write(testr)
TypeError: must be str, not tuple
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Unlike other answers, this will take your suggested tuple:
testr = 'you went' ,speed ,'mph and stopped in' ,stop ,'meters'
test = open('testresults.txt' ,'w')
test.write(" ".join(str(i)for i in testr))
test.close()
Since only the third line is different from your code, here's an explanation:
first str(i)for i in testr
:
the built-in for
-loop is known in python as a list . It just iterates over your tuple testr
, returning values one by one. str(i)
is a typecast, it tries to convert i
to a string. This is necessary because in your tuple some elements are String
-type and some variables are some type of number, probably Float
or Integer
. See str () , float () and int () for further reading.
Then " ".join(...)
:
This is a string function that takes a list or tuple of strings and, like the name sugests, concatenates it together, separating the substring it affects by the part before period ( " "
). This has always seemed a little odd to me, or perhaps inside out, but it's a very useful feature nonetheless!
Hope this helps!
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Fortunately, python 3.6 makes this very easy and accessible to us:
testr = f'you went {speed} mph and stopped in {stop} metres'
test = open('testresults.txt' ,'w')
test.write(testr)
test.close()
otherwise, the same happens when used string.format(*args)
as stated in the other answer.
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