Python inline elif possible?

Question

\'Hello \' + (\'there\' if name is None else name)

Is the equivalent of

msg = \'Hello \'
if name is None:
    msg += \'there\'
else:
          


        

Answer 1

Firstly, run 'pip install pyswitch'

Then:

import pyswitch

mySwitch = pyswitch.Switch()

@mySwitch.case(None):
def gotNone(value):
    return 'Hello there'

@mySwitch.case('Mr. Anderson')
def gotMrAnderson(value):
    return 'Hello Neo'

@mySwitch.default
def gotDefault(value):
    return 'Hello %s' % value

msg = mySwitch.switch(None)  # Returns 'Hello there'
msg = mySwitch.switch('Mr. Anderson')  # Returns 'Hello Neo'
msg = mySwitch.switch('OoglyMoogly')  # Returns 'Hello OoglyMoogly'

Answer 2

Use a dictionary to perform a mapping:

srepr = "'Modify " + {"p": "Pointer", "v": "value"}.get(self.register, "Unknown")

(by the way, instead of '\'...' you can use "'... for a bit more clarity.

Answer 3

'Hello ' + \
('there' if name is None else \
    'Neo' if name == 'Mr Anderson' else \
    name)

I recommend against this; if your conditions become this complex, stick it in a function.

Answer 4

msg = "Hi " + ("there" if not name else ("Neo" if name == "Anderson" else name))

I think that's pretty unreadable, though.

Answer 5

You could also do this:

msg= 'Hello ' + {name is None: 'there', name == 'Mr Anderson': 'Neo'}.get(True, name)

So either of name is None or name == 'Mr Anderson' is True, or none of them is True, then name will be used.

Answer 6

msg = 'Hello ' + (
    'there' if name is None else
    'Neo' if name == 'Mr Anderson' else
    name
)

This is a reiteration of several other answers, but with nicer formatting. I consider this most readable, and this is the approach I would use.