tweet.py

# -*- coding: utf-8 -*-
"""
Posts random tercet from Dante's Comedy on Twitter and Facebook using their API
requires API credentials saved in separate files (see code towards the end of this file)

"""

from twython import Twython, TwythonError 
import facebook
import numpy as np
from dantepage import dantePage

# load the comedy's class
p = dantePage()

# select one line randomly after removing front matter and copyright notices 
nlines = p.epbounds[100]-p.epbounds[0]
randline = round(nlines*np.random.rand())+p.epbounds[0]

# find the canto (idx) this tercet belongs to
for idx,bound in enumerate(p.epbounds):
    if randline<=p.epbounds[idx+1]:
        cantorand = randline - bound
        
        # extract the relevant tercet
        startoffset = cantorand % 3
        begin = randline-startoffset
        end = randline-startoffset+3
        
        # the end of the canto has four lines, not three
        # this also takes care of extra lines at the end of the cantica
        if idx==33 or idx==66:
            if end>=p.epbounds[idx+1]-3:
                end = p.epbounds[idx+1]-2
        else:
            if end>=p.epbounds[idx+1]-2:
                end = p.epbounds[idx+1]-1
        while end-begin<3:
            begin = begin-3
            
        # final array of 3 or 4 verses
        randomterc = p.lines[begin:end]
        break

# start preparing the string: remove whitespace and join with newlines      
randomterc = [line.strip() for line in randomterc]
tercstr = "\n".join(randomterc)

# define cantica, canto number, and verses' line numbers for output and links
if idx<34:
    cantica = 'Inf'
    canto = idx+1
elif idx < 67:
    cantica = 'Purg'
    canto = idx-33
else:
    cantica = 'Par'
    canto = idx-66
verses = " ("+str(cantorand-startoffset+1) + "-" + str(cantorand-startoffset+1+len(randomterc))+")"

# build final string, including links to commentary
tweet = (tercstr + "\n\n-- " + p.epnames[idx].strip() + verses
         + "\n\nCommenti: https://dante.princeton.edu/cgi-bin/dante/campuscgi/mpb/GetCantoSection.pl?INP_POEM="
         + cantica + '&INP_SECT=' + str(canto) + "&INP_START=1&INP_LEN=150&LANG=2"
         + "\nConcordanze:  https://danteconcordance.andreamoro.net/dantepage.py?e="
         + str(idx+1).strip()
         + "#row"+str(begin-p.epbounds[idx]+1)
         )

# twitter API magic: load credentials and post
with open('[path]/creds-twitter') as f:
    lines = f.read().splitlines()

twitter = Twython(lines[0], lines[1], lines[2], lines[3])
twpost = twitter.update_status(status= tweet)

# facebook API enchilada: load credentials and post
with open('[path]/creds-facebook') as f:
    lines = f.read().splitlines()
graph = facebook.GraphAPI(access_token= lines[0], version="3.1")

fbpost = graph.put_object(parent_object='me', connection_name='feed', message=tweet)

# print the final output, including API's responses
print(tweet)
print('\nfacebook: ', fbpost)
print('twitter: ', twpost['user']['name']+'/'+str(twpost['id']))