PyStore 0.1.13

安装pystore

使用pip安装

$ pip install PyStore

或使用以下命令进行升级：

$ pip install PyStore --upgrade --no-cache-dir

安装说明： 如果没有安装Snappy（压缩/解压缩库），则需要 你需要install it first。

使用pystore

#!/usr/bin/env python# -*- coding: utf-8 -*-importpystoreimportquandl# Set storage path (optional, default is `~/pystore`)pystore.set_path("~/pystore")# List storespystore.list_stores()# Connect to datastore (create it if not exist)store=pystore.store('mydatastore')# List existing collectionsstore.list_collections()# Access a collection (create it if not exist)collection=store.collection('NASDAQ')# List items in collectioncollection.list_items()# Load some data from Quandlaapl=quandl.get("WIKI/AAPL",authtoken="your token here")# Store the first 100 rows of the data in the collection under "AAPL"collection.write('AAPL',aapl[:100],metadata={'source':'Quandl'})# Reading the item's dataitem=collection.item('AAPL')data=item.data# <-- Dask dataframe (see dask.pydata.org)metadata=item.metadatadf=item.to_pandas()# Append the rest of the rows to the "AAPL" itemcollection.append('AAPL',aapl[100:])# Reading the item's dataitem=collection.item('AAPL')data=item.datametadata=item.metadatadf=item.to_pandas()# --- Query functionality ---# Query avaialable symbols based on metadatacollection.list_items(some_key='some_value',other_key='other_value')# --- Snapshot functionality ---# Snapshot a collection# (Point-in-time named reference for all current symbols in a collection)collection.create_snapshot('snapshot_name')# List available snapshotscollection.list_snapshots()# Get a version of a symbol given a snapshot namecollection.item('AAPL',snapshot='snapshot_name')# Delete a collection snapshotcollection.delete_snapshot('snapshot_name')# ...# Delete the item from the current versioncollection.delete_item('AAPL')# Delete the collectionstore.delete_collection('NASDAQ')

依赖关系：

pystore使用Snappy， 来自google的快速高效的压缩/解压库。 在安装pystore之前，您需要在系统上安装snapy。

*有关详细信息，请参见python-snappyGithub repo。

*nix系统：

• 公寓：sudo apt-get install libsnappy-dev
• 转速：sudo yum install libsnappy-devel

macos:

首先，使用Homebrew：

$ brew install snappy

然后，使用conda:

$ conda install python-snappy -c conda-forge

…或者，使用pip：

$ CPPFLAGS="-I/usr/local/include -L/usr/local/lib" pip install python-snappy

windows:

windows用户应该签出Snappy for Windows和this Stackoverflow post以获取有关安装snappy和python-snappy的帮助。