Question

我是cassandra python模块的新手，所以我正在尝试将json文件插入到表中使用batchstatement。但是我遇到了'KeyError：0'错误。我知道提供的文档太多了。但是我几乎尝试了所有操作，但不理解我的错误。请帮忙！ >


import json
import logging
from cassandra.cluster import Cluster
import os
from uuid import uuid4
from cassandra.cluster import Cluster, BatchStatement
from cassandra import ConsistencyLevel
from myencoder import MyEncoder
import logging
import re
import ast


def parsing():

    with open('dfs.json', 'r', encoding="utf8") as json_file:
        data = json.load(json_file)
        aboutlegacy = data['aboutLegacy']
        accomplishments = data['accomplishments']
        profilealternative = data['profileAlternative']
        educations = data['educations']
        profileLegacy = data['profileLegacy']
        peopleAlsoviewed = data['peopleAlsoViewed']
        positions = data['positions']
        skills = data['skills']
        recommendations = data['recommendations']
        volunteerExperience = data['volunteerExperience']
        profile = data['profile']
        idd = uuid4()


        query = """
        INSERT INTO profile (id,profilelegacy,profilealternative,aboutlegacy,positions,educations,skills,recommendations,accomplishments,peoplealsoviewed,volunteerExperience,profile)
          VALUES (?,?,?,?,?,?,?,?,?,?,?,?);"""
        insert_user = session.prepare(query)
        batch = BatchStatement(consistency_level=ConsistencyLevel.ONE)

        batch.add(insert_user, (idd, profileLegacy, profilealternative, aboutlegacy, positions, educations,
                                skills, recommendations, accomplishments, peopleAlsoviewed, volunteerExperience, profile,))
        log = logging.getLogger()
        log.info('Batch Insert Completed')
        session.execute(batch)


if __name__ == "__main__":
    cluster = Cluster(['127.0.0.1'], port=9042)
    session = cluster.connect('profiles', wait_for_all_pools=True)
    session.execute('USE profiles')
    parsing()

此错误产生了：

File "cassandratest2.py", line 61, in <module>
    parsing()
  File "cassandratest2.py", line 51, in parsing
    skills, recommendations, accomplishments, peopleAlsoviewed, volunteerExperience, profile,))
  File "C:\Python\Python37\lib\site-packages\cassandra\query.py", line 815, in add
    bound_statement = statement.bind(() if parameters is None else parameters)
  File "C:\Python\Python37\lib\site-packages\cassandra\query.py", line 501, in bind
    return BoundStatement(self).bind(values)
  File "C:\Python\Python37\lib\site-packages\cassandra\query.py", line 627, in bind
    self.values.append(col_spec.type.serialize(value, proto_version))
  File "C:\Python\Python37\lib\site-packages\cassandra\cqltypes.py", line 723, in serialize
    return cls.serialize_safe(val, protocol_version)
  File "C:\Python\Python37\lib\site-packages\cassandra\cqltypes.py", line 942, in serialize_safe
    item = val[i]
KeyError: 0

这是json文件，只是格式，因为它包含机密信息

{
    "profileLegacy": {
        "name": "",
        "headline": "",
        "location": "",
        "connections": 0,
        "summary": ""
    },
    "profileAlternative": {
        "name": "",
        "headline": "",
        "location": "",
        "connections": 0
    },
    "aboutLegacy": {
        "text": ""
    },
    "positions": [{
        "org": "",
        "title": "",
        "end": "",
        "start": "",
        "desce": ""
    }],
    "educations": [{
        "major": "",
        "end": "",
        "name": "",
        "degree": "Maestr\u00eda en Finanzas",
        "start": "",
        "desce": ""
    }],
    "skills": [
        "Key Account Development",
        "Strategic Planning"
    ],
    "recommendations": {
        "givenCount": "0",
        "receivedCount": "0",
        "given": [],
        "received": []
    },
    "accomplishments": [],
    "peopleAlsoViewed": [{
        "url": "",
        "id": ""
    }],
    "volunteerExperience": [],
    "profile": {
        "name": "",
        "headline": "",
        "location": "",
        "connections": 0
    }
}

这是cqlsh中的创建表查询

CREATE TABLE profile (
    id uuid PRIMARY KEY,
    profilelegacy frozen<profilelegacy>,
    profilealternative  frozen<profilelaternative>,
    aboutlegacy text,
    positions list<frozen<positions>>,
    educations set<frozen<educations>>,
    skills list<text>,
    recommendations frozen<recommendations>,
    accomplishments list<text>,
    peoplealsoviewed list<frozen<peoplealsoviewed>>,
    volunteerExperience list<text>,
    profile frozen<profilelaternative>
) WITH bloom_filter_fp_chance = 0.01
    AND caching = {'keys': 'ALL', 'rows_per_partition': 'NONE'}
    AND comment = ''
    AND compaction = {'class': 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy', 'max_threshold': '32', 'min_threshold': '4'}
    AND compression = {'chunk_length_in_kb': '64', 'class': 'org.apache.cassandra.io.compress.LZ4Compressor'}
    AND crc_check_chance = 1.0
    AND dclocal_read_repair_chance = 0.1
    AND default_time_to_live = 0
    AND gc_grace_seconds = 864000
    AND max_index_interval = 2048
    AND memtable_flush_period_in_ms = 0
    AND min_index_interval = 128
    AND read_repair_chance = 0.0
    AND speculative_retry = '99PERCENTILE';

这些是声明的类型

CREATE TYPE profiles.peoplealsoviewed (
    url text,
    id text
);

CREATE TYPE profiles.profilelegacy (
    name text,
    headline text,
    location text,
    connections int,
    summary text
);

CREATE TYPE profiles.positions (
    org text,
    title text,
    end text,
    start text,
    desce text
);

CREATE TYPE profiles.recommendations (
    givencount text,
    receivedcount text,
    given frozen<list<text>>,
    received frozen<list<text>>
);

CREATE TYPE profiles.skills (
    title text,
    count text
);

CREATE TYPE profiles.educations (
    major text,
    end text,
    name text,
    degree text,
    start text,
    desce text
);

CREATE TYPE profiles.profilelaternative (
    name text,
    headline text,
    location text,
    connections int
);

我从cassandra python模块收到错误

0 个答案: