rename.py

import os

# Get list of files to rename
files = os.listdir('.')
files = filter(lambda x: x.endswith('pdf'), files)

import pdftotext
for f in files:
    fdat = ""
    with open(f, 'rb') as pf:
        fdat = pdftotext.PDF(pf)
    fdat = fdat[0].split('\n')[0].strip().replace(' ', '').replace(':','').replace('/', '')
    #print(fdat)
    os.rename(f, fdat+'.pdf')