Redirecting stdin to a file

[candide]

How do I redirect stdin to a text file ? In C, this can be done with the
freopen() standard function, for instance

FILE *foo = freopen("in.txt", "r", stdin);


redirects stdin to the in.txt text file. Does anyone know a freopen()
Python equivalent ?

Notice that I'm not referring to shell redirection as the following
command line shows :

$ python myCode.py < in.txt

I need to hardcode the redirection inside the python source file.

 

[Lie Ryan]

How do I redirect stdin to a text file ? In C, this can be done with the
freopen() standard function, for instance

FILE *foo = freopen("in.txt", "r", stdin);


redirects stdin to the in.txt text file. Does anyone know a freopen()
Python equivalent ?

Notice that I'm not referring to shell redirection as the following
command line shows :

$ python myCode.py< in.txt

I need to hardcode the redirection inside the python source file.

I'm not sure how freopen() works in C, but perhaps you're looking for
redirecting sys.stdin:
import sys
old_stdin = sys.stdin # save it, in case we need to restore it
sys.stdin = open('myfile')

you can also restore stdin using sys.__stdin__ instead of saving the old
one, but in the case you or someone else is redirecting the stdin twice...

 

[MRAB]

How do I redirect stdin to a text file ? In C, this can be done with
the freopen() standard function, for instance

FILE *foo = freopen("in.txt", "r", stdin);


redirects stdin to the in.txt text file. Does anyone know a freopen()
Python equivalent ?

Notice that I'm not referring to shell redirection as the following
command line shows :

$ python myCode.py < in.txt

I need to hardcode the redirection inside the python source file.

The standard input is sys.stdin and the standard output is sys.stdout.

sys.stdin.close()
sys.stdin = open("in.txt", "r")

 

[candide]

@MRAB
@Lie Ryan

Thanks, it works fine !