d = {}
with open('acronym.txt', 'r') as acronym:
for line in acronym:
    d[line.split(None, 1)[0]] = (line.split(None, 1)[1]).strip()

ntweetsfile= open('newTweets.txt', 'w')
import fileinput
for line in fileinput.input('tweets1k.txt', inplace=True):
    line = line.rstrip()
    if not line:
        continue
    for key in d:
        if str(key) in line:
            line = line.replace(str(key), d[key])
            ntweetsfile.write(str(line)+'n')
        else:
            ntweetsfile.write(str(line)+'n')
ntweetsfile.close()