os is a core Python module that allows exposure of OS-specific tasks.
os.error- an alias for the OSError exception
os.name- the registered name of the OS. For example: 'posix'
os.environ- the environment that Python interpreter currently sees. This object is like a dict. Setting will call 'putenv'
os.getcwd()- current directory functions. chdir CHanges DIRectory, getcwd GETs Current Working Directory and fchdir changes to the direct that the file that is specified by the fd is in
or.urandom(n)- Generates a random string of bytes, n digits long. Unlike
random.randint, it is completely random; not pseudorandom.
os.system(command)- Executes a CMD command.
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