我正在嘗試在py2neo中將文件作為參數(shù)傳遞，以使查詢中的變量作為其他參數(shù)。而不是：cypherfrom py2neo import Graphgraph = Graph(password = "*****")def test(some_things): result = graph.run( "MATCH (movie:movies)" "where movie.name =~ $name " "RETURN movie",{"name":"(?i).*" + some_things+ ".*"}) return result我想知道是否有這樣的東西：from py2neo import Graphgraph = Graph(password = "*****")def test(some_things): result = graph.run("some_cypher.cypher", some_things) return result其中可能是：some_cypher.cypherMATCH (movie:movies) where movie.name =~ $name RETURN movie, ,{"name":"(?i).*" + ?+ ".*"}在 python 文件中是要替換為 的參數(shù)。?some_things
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TA貢獻1804條經(jīng)驗 獲得超3個贊
雖然在py2neo中沒有直接從文件中讀取的內(nèi)置選項，但有一種機制可以根據(jù)需要獲取參數(shù)序列。因此，剩下的只是使用一個函數(shù)從文件中讀取查詢并使用參數(shù)。這應(yīng)該看起來像這樣：
from py2neo import Graph
graph = Graph(password = "*****")
def run_query_from_file(cypher_file_path, parameters=None, **kwparameters):
with open(cypher_file_path, 'r') as cypher_file:
cypher_query = cypher_file.read().strip()
graph.run(cypher_query, parameters)
def test1(dict_of_parameters):
result = run_query_from_file("some_cypher.cypher", dict_of_parameters)
return result
def test2(**kwparameters):
result = run_query_from_file("some_cypher.cypher", **kwparameters)
return result
# Both should work
test1({'username': 'abc', 'password': '123'})
test2('username'='abc', 'password'='123')
其中包含：some_cypher.cypher
MERGE （user：User {username：$username}） with user， user.password as user_password SET user.password = $password RETURN user_password
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