Iterating over readlines() and map()

[W. Martin Borgert]

Hi,

if I understand correctly, this code would not read the complete file
into the memory:

for line in myfile.readlines():
     dosomethingwith(line)

Is this also true for this code?

for line in map(myfunction, myfile.readlines()):
     dosomethingwith(line)

Or would use of map() mean, that the complete "myfile" is read into
the RAM? In this case, I would change it to:

for line in myfile.readlines():
     line = myfunction(line)
     dosomethingwith(line)

TIA!