python:
for line in sys.stdin:
foo(line)
def foo(name):
return "hello " + name
shell:
welcome_saying = $(echo "Tom" | python welcome.py)
echo "$welcome_saying"
I expected "hello Tom" printed in console, but none.
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Sagar Zala
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Tiina
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1 Answers
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print("hello" + name)
return returns the value to the calling function, not to the console.
Then you have to write the pipe properly: How do I redirect output to a variable in shell?
Matthieu Brucher
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I expected to use the returned value `welcome_saying`, not to print on console. – Tiina Oct 12 '18 at 09:07
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oh i see, it must write to stdout either from `print` or `sys.stdout.write(welcome())` – Tiina Oct 12 '18 at 09:12
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Yes, and then you need to put the output in your variable. – Matthieu Brucher Oct 12 '18 at 09:16
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but it also assigned stderr to shell variable. – Tiina Oct 12 '18 at 09:23