gistfile1.py

def process_file(name, f):
    res = []
    i = 0
    for line in f:
        add_emails(name, line, res)
        add_emails2(name, line, res)
        add_phone_numbers(name, line, res)

    return res

# ...
# ...

stanford = '.'.join(c for c in '@stanford.edu')

email2_pattern = '(?i)([\S]+%s)' % (stanford)
def add_emails2(file_name, line, res):
    matches = re.findall(email2_pattern,line)

    if len(matches) > 0:
        email = matches[0]
        char = repeated_char(email)

        if char != '':
            email = re.sub(char, '', email)
            res.append((file_name,'e', email))


def repeated_char(string):
    parts = [c for c in string]

    if len(parts) > 2:
        if all_eq(parts[::2]):
           return parts[0]
        elif all_eq(parts[1::2]):
           return parts[1]
    return ''

def all_eq(arr):
  return len(set(arr)) <= 1