import requests

# All POST/PUT/DELETE requests must have the following headers
headers = {'X-Requested-With': 'XMLHttpRequest', 'Origin': 'https://example.claritylims.com'}
session = requests.Session()

# authenticate with the lims server, associates a cookie with the session
response = session.post('https://example.claritylims.com/clarity/j_spring_security_check',
    {"j_username": "admin", "j_password": "password"})

response = session.post('https://example.claritylims.com/clarity/api/search-index/reindex', headers=headers)
print response.text

response = session.get('https://example.claritylims.com/clarity/api/search-index/status', headers=headers)
print response.text