import os


def make_file_name(f, i):
    dot = f.rfind('.')
    return f[:dot] + '-' + str(i) + f[dot:]


def creer_repertoire_si_besoin(rep):
    if not os.path.isdir(rep):
        os.mkdir(rep)


i = 1
for d in ['dir1', 'dir2', 'dir3']:
    creer_repertoire_si_besoin(d)
    for f in ['toto.py', 'toto.txt', 'tutu.txt']:
        out = open(os.path.join(d, make_file_name(f, i)), 'w')
        i = i + 1
        out.write('Contenu')
    for subdir in ['subdir1', 'subdir2']:
        creer_repertoire_si_besoin(os.path.join(d, subdir))
        for f in ['f1.txt', 'f2.txt']:
            out = open(os.path.join(d, subdir, make_file_name(f, i)), 'w')
            i = i + 1
            out.write('Contenu')

for f in ['file1', 'file2']:
    out = open(f, 'w')
    out.write('Contenu du fichier')