Python Tutorial ( PDFDrive )

# Open a file
fd = os.open( "foo.txt", os.O_RDWR|os.O_CREAT )
# Write one string
os.write(fd, "This is test - This is test")
# Now you can use ftruncate() method.
os.ftruncate(fd, 10)
# Now read this file from the beginning.
os.lseek(fd, 0, 0)
str = os.read(fd, 100)
print "Read String is : ", str
# Close opened file
os.close( fd )
print "Closed the file successfully!!"
Let us compile and run the above program, this will produce the following result:
Read String is : This is te
Closed the file successfully!!
os.getcwd()
Description
The method getcwd() returns current working directory of a process.
Syntax
Following is the syntax for getcwd() method:
os.chdir(path)
Parameters
• NA
Return Value
This method returns current working directory of a process.
Example
The following example shows the usage of getcwd() method.
#!/usr/bin/python
import os, sys
# First go to the "/var/www/html" directory
os.chdir("/var/www/html" )
# Print current working directory
print "Current working dir : %s" % os.getcwd()
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