grequests with requests has collision

I am using grequests python module to call some APIs. I want to make two functions.

1. A single request(use requests module)
2. A multiple request(use grequests module)

When I use two modules in two different files, it runs normally, but when I import two modules in the same file, requests module fall in infinity recursive.

  #!/usr/bin/env python                                                                                                                                                                                            #-*- encoding:utf-8 -*-                                                                                                                                                                                          import requests                                                                                                                                                                                                  import grequests                                                                                                                                                                                                 def SingleRequest():                                                                                                                                                                                                 rs = requests.get("www.example.com")                                                                                                                                                                                return rs                                                                                                                                                                                               def MultiRequest():                                                                                                                                                                                                  urls = [                                                                                                                                                                                                   "www.example1.com", "www.example2.com",  "www.example3.com"      ]                                                                                                                                                                                                                rs = [grequests.get(u) for u in urls]                                                                                                                                                              rs_map = grequests.map(rs);                                                                                                                                                                                      return rs_map;       

If I call MultiRequest() -> do Well!

but if I call SingleRequest() ..... ↓

Exception Type: RecursionErrorException Value: maximum recursion depth exceededException Location: /usr/local/lib/python3.6/ssl.py in options, line 459/usr/local/lib/python3.6/ssl.py in options     super(SSLContext, SSLContext).options.__set__(self, value) X 100 times...

Is it possible to use requests and grequests in one file?