## 10.1 Nanotube Construction

`nanocap_nanotube.py` an example script to construct an uncapped nanotube. The code is shown below.

    '''
    -=-=-=-=-=-=-=-=-=-=-=-=-=NanoCap=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
    Copyright Marc Robinson  2014
    -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

    A script to construct an uncapped
    nanotube.

    Input:
        n,m = Chirality (n,m)
        l = length
        u = number of unit cells
        p = periodic
    Output:
        xyz file containing carbon
        lattice

    if periodic, length is ignored and
    unit cells is used
    -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
    '''
    from nanocap.structures import nanotube
    from nanocap.core import output

    n=6
    m=4
    l=5.0
    u=1
    p=True

    my_nanotube = nanotube.Nanotube()
    my_nanotube.construct(n,m,length=l,
                         units=u,periodic=p)

    output.write_xyz("nanotube_carbon_lattice",
                     my_nanotube.carbon_lattice)