Autonomous Python Script

[Leyo]

good evening,

May I ask for your help again?

Create a plural.py script, capable of taking several words and displaying their plural.

Example:

$several.py dog, cat, bird
dogs
cats
birds

The script must be used in the terminal.

so far I wrote:

def several(a,b,c):
    plural_a=a+'s'
    plural_b=b+'s'
    plural_c=c+'s'

    print( plural_a+"\n",plural_b+"\n",plural_c+"\n")
several('cat','dog','camel')

And it works.
but somehow I can't launch it from my terminal.
I'm on Ubuntu.
the script is in the main directory
I used chmod +x several.py to make the script executable from the terminal
yet nothin happens -> is my script wrong?

[Axel_Erfurt]

Insert at top of several.py

#!/usr/bin/env python3

or run in terminal

python3 several.py

[deanhystad]

How do you try to launch it?

[Leyo]

How do you try to launch it?

Hello,
In the terminal I've tried :

python3 several.py

as suggested by Axel_Erfurt

also:

sudo python3 several.py

but nothing.

[ibreeden]

Example:

$several.py dog, cat, bird

As the example shows and as Axel_Erfurt emphasised, you have to start the script on the command line with arguments. So you have to do something to get those arguments. So make a script "test_arguments.py" like this:

#!/usr/bin/python3
import sys
print(sys.argv)

when you start this script with:

test_arguments.py  dog  cat  bird

Output:
['test_arguments.py', 'dog', 'cat', 'bird']

Here you see sys.argv is a list where sys.argv[0] is the name of the script and the following items are the arguments.
So when you change the script to:

import sys

for arg in sys.argv[1:]:
    print(arg)

... you get:

Output:
dog
cat
bird

Now you should know enough to finish your script.

but nothing.

I think an error message appeared. You should always include the complete error message.

[Axel_Erfurt]

In the terminal I've tried :

python3 several.py

You should do this in the script folder , adjust /path/to/script

cd /path/to/script
python3 several.py

[Axel_Erfurt]

f-string makes it easier

#!/usr/bin/env python3

def several(a,b,c):
    plural_a=f'{a}s'
    plural_b=f'{b}s'
    plural_c=f'{c}s'
 
    print(f'{plural_a}\n{plural_b}\n{plural_c}\n')
several('cat','dog','camel')

saved in /tmp as several.py

then in terminal

Output:
axel@Esprimo-P400:~$ cd /tmp
axel@Esprimo-P400:/tmp$ python3 several.py
cats
dogs
camels