duplicated values in print()

Question

Can anyone tell me why im getting duplicated values when I print the results of this list?

degrees_values = [0, 5.85, -2.5]
kelvin_values = []
for degrees in degrees_values:
    kelvin = degrees + 273.15
    kelvin_values = kelvin_values + [kelvin]
    print(kelvin_values)

I’ve tried printing the list length, just ‘kelvin’ but this isn’t the result I’m after. I’m consantly seeing this:

[273.15]
[273.15, 279.0]
[273.15, 279.0, 270.65]

when im looking for just:

[273.15, 279.0, 270.65]

Asked By: Matt Gwatkin

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Source

Answer 1

You should move the print statement out of the for loop block as such:

degrees_values = [0, 5.85, -2.5]
kelvin_values = []
for degrees in degrees_values:
    kelvin = degrees + 273.15
    kelvin_values = kelvin_values + [kelvin]
print(kelvin_values)

When you put the print inside the block, each iteration you print kelvin_values and it "spams" your console..

Answered By: no_hex

Answer 2

This is an indentation problem.
It seems like you did not paste your code correctly in StackOverflow, but I assume that it looks like this :

degrees_values = [0, 5.85, -2.5]
kelvin_values = []
for degrees in degrees_values:
    kelvin = degrees + 273.15
    kelvin_values = kelvin_values + [kelvin]
    print(kelvin_values)

What you are seeing is the list being built, because there is a print statement in each iteration.
I suggest you move the print statement out of the for loop so you only see the final result :

degrees_values = [0, 5.85, -2.5]
kelvin_values = []
for degrees in degrees_values:
    kelvin = degrees + 273.15
    kelvin_values = kelvin_values + [kelvin]

# I do not indent here
print(kelvin_values)

Moreover, it could be wiser to use the append method of the list to add values like so :

degrees_values = [0, 5.85, -2.5]
kelvin_values = []
for degrees in degrees_values:
    kelvin = degrees + 273.15
    kelvin_values.append(kelvin)
print(kelvin_values)

Answered By: LiteApplication

duplicated values in print()

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