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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def mkvirtualenv():
 """ Create the virtualenv project environment """

    root = '/'.join([deployment_root(),'env'])
    path = '/'.join([root,env.project_fullname])
    dirs_created = []
    if env.verbosity:
        print env.host,'CREATING VIRTUALENV', path
    if not exists(root): dirs_created += mkdirs(root)
    with cd(root):
        run(' '.join(["virtualenv",env.project_fullname]))
    with cd(path):
        dirs_created += mkdirs('egg_cache')
        sudo('chown -R %s:www-data egg_cache'% env.user)
        sudo('chmod -R g+w egg_cache')
        run(''.join(["echo 'cd ",path,'/','project','/',env.project_package_name,'/sitesettings',"' > bin/postactivate"]))
        sudo('chmod ugo+rwx bin/postactivate')

    #Create a state
    out = State(' '.join([env.host,'virtualenv',path,'created']))
    out.object = dirs_created + ['bin','lib','include']
    out.failed = False
    return out