Question

我在Python中有多个字典列表，格式为[dic1，dic2，dic3，...，dicx]

我正在尝试将这些词典作为mongodb中的批量插入插入：

(pseudocode)
db.batch.insert_many(dic1, dic2,...,dicx)

但由于每个数组的长度都是可变的，我认为我需要一个for循环，但无法直观地看到如何这样做。

Answer 1

假设函数db.batch.insert（）可以使用可变数量的参数，您可以在列表前面使用*运算符。考虑简单的打印功能：

package com.trypickups.googlelocationservices;

import android.location.Location;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationServices;


public class MainActivity extends ActionBarActivity implements
        GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener{
    private GoogleApiClient mGoogleApiClient;
    private Location mLastLocation;
    private TextView location;
    protected synchronized void buildGoogleApiClient() {
        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();
    }
    @Override

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        buildGoogleApiClient();


    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onConnected(Bundle bundle) {
        final TextView mTextView = (TextView) findViewById(R.id.location);
        mTextView.setText("Latitude "+ String.valueOf(mLastLocation.getLatitude()) + " Longitude " + String.valueOf(mLastLocation.getLongitude()));
    }

    @Override
    public void onConnectionSuspended(int i) {

    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {
        Log.e("Alesti", connectionResult.toString());

    }
}

print（* words）因此相当于print（“dog”，“cat”，“mouse”）

Answer 2

假设你连接到MongoDB并抓住你的数据库：

[tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:YES];

然后，如果您的收藏确实被称为＆＃34;批次＆＃34;你可以使用接受dict数组的.insert_many()方法：

import pymongo
from pymongo import MongoClient

client = MongoClient()
db = client.test

变量输入到Pymongo中的函数

2 个答案: