Since there was talk of if-then-else not being allowed in lambda expressions, the following is from

[Casey Hawthorne]

Since there was talk of if-then-else not being allowed in lambda
expressions, the following is from "Dive into Python"

The and-or conditional expression trick from page 41 of "Dive into
Python"

Wrap the arguments in lists and then take the first element.

a = ""
b = "second"
(1 and [a] or )[0]

''

 

[Peter Otten]

Since there was talk of if-then-else not being allowed in lambda
expressions, the following is from "Dive into Python"

The and-or conditional expression trick from page 41 of "Dive into
Python"

Wrap the arguments in lists and then take the first element.

a = ""
b = "second"
(1 and [a] or )[0]

''

# python 2.5''

Time to tear out that page. Really.

Peter

 

[Ant]

# python 2.5
''

Time to tear out that page. Really.

Not quite - 2.5 hasn't been released in its final version yet, and many
projects I should imagine will take a while to upgrade.

 

[Peter Otten]

Not quite - 2.5 hasn't been released in its final version yet, and many
projects I should imagine will take a while to upgrade.

Ok, use

if cond:
value = ... # expression that must not be evaluated unless it absolutely
# has to be
else:
value = ... # same thing

which will withstand the test of time. Now tear out that page...

Peter

 

[Bruno Desthuilliers]

Ant wrote:




Ok, use

if cond:
value = ... # expression that must not be evaluated unless it absolutely
# has to be
else:
value = ... # same thing

which will withstand the test of time.

But isn't allowed in a lambda !-)

 

[Peter Otten]

But isn't allowed in a lambda !-)

Then tear out that lambada page, too, I was tempted to say, but I will
desist. For now...

Peter

 

[Dennis Lee Bieber]

Then tear out that lambada page, too, I was tempted to say, but I will
desist. For now...

If Python is now doing the lambada, I don't think I want to watch...
<G>
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