Output showing "None" in Terminal
Hi!
i'm new to python and would like some help with something i was working on
from a tutorial. I'm using VScode with 3.7.0 version on Windows 7. Below is
my code and the terminal is showing the word "None" everytime I execute my
code.
Many thanks!
print("Conversion")
def km_mi():
return answer
selection = input("Type mi for miles or km for kilometers: ")
if selection == "mi":
n = int(input(print("Please enter distance in miles: ")))
answer = (1.6*n)
print("%.2f" % answer, "miles")
else:
n = float(input(print("Please enter distance in kilometers: ")))
answer = (n/1.6)
print("%.2f" % answer, "kilometers")
answer = km_mi
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Re: Output showing "None" in Terminal
Thank you for the clarification.
What I'm trying to achieve here are:
User be able to choose miles or kilometers to convert.
When selected (mi/km), prints out the user input and the answer.
km to mi = km/1.609
mi to km = mi*1.609
Thank you again!
On Mon, Aug 24, 2020 at 1:41 PM Calvin Spealman wrote:
> How are you actually running your code?
>
> "None" is the default return value of all functions in Python. But, the
> interpreter is supposed to suppress it as a displayed result.
>
> As a side note, both your km_mi() function and the line "answer = km_mi"
> are certainly wrong, but it is not clear what you intend to do.
>
> On Mon, Aug 24, 2020 at 4:25 PM Py Noob wrote:
>
>> Hi!
>>
>> i'm new to python and would like some help with something i was working on
>> from a tutorial. I'm using VScode with 3.7.0 version on Windows 7. Below
>> is
>> my code and the terminal is showing the word "None" everytime I execute my
>> code.
>>
>> Many thanks!
>>
>> print("Conversion")
>>
>> def km_mi():
>> return answer
>>
>> selection = input("Type mi for miles or km for kilometers: ")
>>
>> if selection == "mi":
>> n = int(input(print("Please enter distance in miles: ")))
>> answer = (1.6*n)
>> print("%.2f" % answer, "miles")
>>
>> else:
>> n = float(input(print("Please enter distance in kilometers: ")))
>> answer = (n/1.6)
>> print("%.2f" % answer, "kilometers")
>>
>> answer = km_mi
>> --
>> https://mail.python.org/mailman/listinfo/python-list
>>
>>
>
> --
>
> CALVIN SPEALMAN
>
> SENIOR QUALITY ENGINEER
>
> cspea...@redhat.com M: +1.336.210.5107
> [image: https://red.ht/sig] <https://red.ht/sig>
> TRIED. TESTED. TRUSTED. <https://redhat.com/trusted>
>
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Re: Output showing "None" in Terminal
Thank you so much for the help.
I'm self-studying and watching tutorials on youTube. The problem was given
as an exercise after the tutorial.
I did modify my code based on the suggestions here and it helps.
Thank you!
On Tue, Aug 25, 2020 at 4:31 PM Schachner, Joseph <
joseph.schach...@teledyne.com> wrote:
> The very first line of your function km_mi(): ends it:
> def km_mi():
> return answer
>
> answer has not been assigned, so it returns None.
>
> Advice: remove that "return" line from there. Also get rid of the last
> line, answer = km_mi which makes answer refer to the function km_mi().
> Put the "return answer" line at the end, where the "answer=km_mi" used to
> be.
>
> That should help. The code calculates "answer". It prints "answer".
> You should return "answer" at the end, after it has been calculated.
>
> --- Joseph S.
>
> -Original Message-
> From: Py Noob
> Sent: Monday, August 24, 2020 9:12 AM
> To: python-list@python.org
> Subject: Output showing "None" in Terminal
>
> Hi!
>
> i'm new to python and would like some help with something i was working on
> from a tutorial. I'm using VScode with 3.7.0 version on Windows 7. Below is
> my code and the terminal is showing the word "None" everytime I execute my
> code.
>
> Many thanks!
>
> print("Conversion")
>
> def km_mi():
> return answer
>
> selection = input("Type mi for miles or km for kilometers: ")
>
> if selection == "mi":
> n = int(input(print("Please enter distance in miles: ")))
> answer = (1.6*n)
> print("%.2f" % answer, "miles")
>
> else:
> n = float(input(print("Please enter distance in kilometers: ")))
> answer = (n/1.6)
> print("%.2f" % answer, "kilometers")
>
> answer = km_mi
>
>
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