payload={
"Jessie":"Hello",
"python":12334,
"requests":True，
}
url="http://httpbin.org/post"

方法1 -直接传json参数(推荐使用)

r1=requests.post(url,json=payload)
r2 = requests.post(url,json.dumps(payload))
print(r1.text)

方法2 -传data参数，需要转json

r2=requests.post(url,data=json.dumps(payload))
print(r2.text)