oneliners.py did not work as expected

[ScottHuangZL]

https://flexx.readthedocs.io/en/stable/examples/oneliners_src.html#oneliners-py

oneliners.py did not work as expected

The message still empty.

I try to replace event to flx, also not work. Thanks.

This example demonstrates how a property can be set to follow other properties
by setting the property to be a function, which is converted to a reaction by
Flexx.

This feature makes basic plumbing very easy, like e.g. showing values
of properties in a label widget.
"""

# todo: also a one-liner to invoke actions from emitters (issue #425)

from flexx import flx


class Person(flx.Component):

    first_name = flx.StringProp('Jane', settable=True)
    last_name = flx.StringProp('Doe', settable=True)


class Greeter(flx.Component):

    message = flx.StringProp('', settable=True)

    @flx.reaction
    def show_message(self):
        print('Message:', self.message)

p = Person()

# This is the line that this is about
g = Greeter(message=lambda: p.first_name + ' ' + p.last_name)

print(p.first_name,p.last_name,g.message)
p.set_first_name('Alice')
print(p.first_name,p.last_name,g.message)
flx.loop.iter()
print(p.first_name,p.last_name,g.message)

[almarklein]

I see you're trying to use Markdown formatting :) Use three backquotes before and after the code. You can specify the language too:

```
bla bla
# comment
code
```

```py
# comment
def foo():
   pass
```

[almarklein]

Seems to work fine here. What output do you get? Mine is:

[I 10:59:48 flexx.app] Asset store collected 2 new modules.
Jane Doe
Jane Doe
Message:
Alice Doe

[ScottHuangZL]

Same as you.

I original think

    @flx.reaction
    def show_message(self):
        print('Message:', self.message)

would direct print message after flx.loop.iter()

Now I understanding that you just want to demo the lambda function in one line.