Python os.isatty() 方法

#!/usr/bin/python

import os, sys

# Open a file
fd = os.open( "foo.txt", os.O_RDWR|os.O_CREAT )

# Write one string
os.write(fd, "This is test")

# Now use isatty() to check the file.
ret = os.isatty(fd)
print "Returned value is: ", ret

# Close opened file
os.close( fd )