Python Input from keyboard

[Eric]

utab wrote:
> hi,
> I could not understand why python stdin and stdout are not explained in
> any of the tutorials on the net,
>
> I want to read some input continuously from keyboard and then I would
> like to process these input.
>
> I have a code like this but getting errors, I would like to terminate
> when there is an empty string in the input, why is not this easy as the
> "cin" or "scanf". I had to search for even this easy operation. Is
> there a way to send EOF signal to terminate input(ctrl+??????)
>
> #!/usr/bin/env python
> import sys, math       # load system and math module
> x=[]
> y=[]
> IN=True
> print 'input x and y values :   '
> while IN:
>         xt,yt=input()
>
>         if (xt==' ' or yt==' '):
>                 print 'you have not entered x or y, quiting'
>                 break
>         else:
>                 xt= float(xt);yt=float(yt)
>                 x.append(xt);y.append(yt)
>
> for i in range(x):
>         print x[i]


Summary:

std::cout << "Statement\n";
is
print "Statement"

std::cin << value;
is
value = raw_input()


std::cout << "Prompt:"
std::cin << value;
is
value = raw_input("Prompt:")


It's a little assymetrical, but useful. Lower-level functions also
exist in the sys module as stdin, stdout and stderr.