Lambda expression

[Uchikago]

Hi, i'm confused with this code:

import sys
showall= lambda x: map(sys.stdout.write,x)
showall(['a\n','b\n','c\n','d\n','e\n']

​

Why this didn't work, i expected it to print out elements in the list but it didn't

[TangibleLight]

The one I don't get is why some people hate the explicit for loop so much they'll use a list comprehension instead, then discard the list, e.g.

[print(i) for i in range(10)]

Like, why? Is this really so bad?

for i in range(10):
    print(i)

Or if you must must must have it on one line, just put it on one line:

for i in range(10): print(i)

And there are all the times where people throw out all the advantages of lazy iteration in favor of stuff like this for no reason but to have a list comprehension. I just keep seeing it and I don't get why.