lambdas (lambda x: printx)

[Michal]

Hi,

Today I started with python and I cannot understand why expresion
lambda x: print x
returns syntax error (but for example lambda x: sys.stdio.write (x) does not)
First I fought the reason is scopeing, but it shouldnt return syntax error.

misza

[Erik Max Francis]

Re: lambdas (lambda x: printx)

Michal wrote:
[color=blue]
> Today I started with python and I cannot understand why expresion
> lambda x: print x
> returns syntax error (but for example lambda x: sys.stdio.write (x)
> does not)
> First I fought the reason is scopeing, but it shouldnt return syntax
> error.[/color]

The problem is that you can only put an expression in a lambda form.
print is a statement, not an expression. Other examples of statements
are if...else control structures, variable assignments, and return
statements.

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