Python Tutorial ( PDFDrive )

Syntax
Following is the syntax for closerange() method:
os.closerange(fd_low, fd_high);
Parameters
• fd_low -- This is the Lowest file descriptor to be closed.
• fd_high -- This is the Highest file descriptor to be closed.
This function is equivalent to:
for fd in xrange(fd_low, fd_high):
try:
os.close(fd)
except OSError:
pass
Return Value
This method does not return any value.
Example
The following example shows the usage of closerange() method.
#!/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")
# Close a single opened file
os.closerange( fd, fd)
print "Closed the file successfully!!"
This would create given file foo.txt and then write given content in that file.This will produce the following result:
Closed the file successfully!!
os.dup(fd)
Description
The method dup() returns a duplicate of file descriptor fd which can be used in place of original descriptor.
Syntax
Following is the syntax for dup() method:
os.dup(fd);
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