require for fabric in ubuntu system

gistfile1.py

def require(package):
    with settings(hide('stdout'), warn_only=True):
        out = run('dpkg -s %s' %package)
        if not out.succeeded:
            print "The package is not installed. Installing \n"
            sudo("apt-get install %s" %package)
        else:
            print "The package is installed.\n"


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Usage:

def deploy():
    require('curl')
    sudo('curl -O ....")