Question

我正在尝试neoj4网站上的Python驱动程序示例。问题是我不断收到IndentionError

我尝试了空格与制表符。无法解决。在这个简单的文件中，我做了一个：

def print_this(str):
  print(str)
  return;

print_this('a simple test')

效果很好。

from neo4j.v1 import GraphDatabase

uri = "bolt://localhost:7687"
driver = GraphDatabase.driver(uri, auth=("neo4j", "password"))

def print_friends_of(tx, name):
    for record in tx.run("MATCH (a:Person)-[:KNOWS]->(f) "
                         "WHERE a.name = {name} "
                         "RETURN f.name", name=name):
    print(record["f.name"])

with driver.session() as session:
    session.read_transaction(print_friends_of, "Alice")

错误

print(record["f.name"])
    ^
IndentationError: expected an indented block

有人知道吗？

坦克

Answer 1

带有声明

for record in tx.run("MATCH (a:Person)-[:KNOWS]->(f) "
                     "WHERE a.name = {name} "
                     "RETURN f.name", name=name):

您正在开始一个新的for循环。您的下一行应缩进，使其位于for循环中。更改为

for record in tx.run("MATCH (a:Person)-[:KNOWS]->(f) "
                         "WHERE a.name = {name} "
                         "RETURN f.name", name=name):
    print(record["f.name"]) #note how it is indented to be inside of the for loop

neo4j python语言驱动程序

1 个答案: