<h2>标准接口</h2>
<p>标准以太坊节点可以公开<a href="https://github.com/ethereum/wiki/wiki/JSON-RPC" rel="nofollow noreferrer">^{<cd1>} interface</a>。它通常可以通过本地套接字(aka IPC)或HTTP进行访问,这取决于您拥有的节点以及如何启动它。在</p>
<p>从命令行中,要从<code>geth</code>获取5000000块的统计信息:</p>
<pre><code>$ curl -X POST data '{"jsonrpc":"2.0","method":"eth_getBlockByNumber","params":["0x4c4b40", false],"id":1}' -H "Content-Type: application/json" http://localhost:8545/
{'id': 1,
'jsonrpc': '2.0',
'result': {'difficulty': '0x90c21c56929b2',
'extraData': '0x743132',
'gasLimit': '0x7a121d',
'gasUsed': '0x79fac5',
'hash': '0x7d5a4369273c723454ac137f48a4f142b097aa2779464e6505f1b1c5e37b5382',
'logsBloom': '0x8584009c4dd8101162295d8604b1850200788d4c81f39044821155049d2c036a8a00d07f2a10383180984400b0290ba00293400c1d414a5018104a010220101909b918c601251215109755b90003c6a2c23490829e319a506281d9641ac39a840d3aa03e4a287900e0c09641594409a2010543016e966382c02040754030430e2d708316ec64008f0c0100c713b51f8004005bd48980143e08b22bf2262365b8b2658804a560f1028207666d10288144a5a14609a5bcb221280b13da2f4c8800d8422cc27126a46a04f08c00ca9004081d65cc75d10c62862256118481d2e881a993780808e0a00086e321a4602cb214c0044215281c2ccbca824aca00824a80',
'miner': '0xb2930b35844a230f00e51431acae96fe543a0347',
'mixHash': '0x94cd4e844619ee20989578276a0a9046877d569d37ba076bf2e8e34f76189dea',
'nonce': '0x4617a20003ba3f25',
'number': '0x4c4b40',
'parentHash': '0xcae4df80f5862e4321690857eded0d8a40136dafb8155453920bade5bd0c46c0',
'receiptsRoot': '0x6db67db55d5d972c59646a3bda26a39422e71fe400e4cdf9eb7f5c09b0efa7d0',
'sha3Uncles': '0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347',
'size': '0x5dd1',
'stateRoot': '0x6092dfd6bcdd375764d8718c365ce0e8323034da3d3b0c6d72cf7304996b86ad',
'timestamp': '0x5a70760d',
'totalDifficulty': '0x7be181d83d2d77d052',
'transactions': ['0x569c5b35f203ca6db6e2cec44bceba756fad513384e2bd79c06a8c0181273379',
...
'0xaa2703c3ae5d0024b2c3ab77e5200bb2a8eb39a140fad01e89a495d73760297c'],
'transactionsRoot': '0x91dfce7cc2174482b5ebcf6f4beedce854641982eadb1a8cf538e3206abf7836',
'uncles': []}}
</code></pre>
<h2>Python API</h2>
<p>有几个“web3”库可用于不同的语言,每个库都在json-rpc上提供一个抽象层。<a href="http://web3py.readthedocs.io/en/latest/quickstart.html" rel="nofollow noreferrer">Web3.py</a>是以太坊基金会资助的python接口。在</p>
<p>使用Web3.pyv4 beta(与<code>pip install pre web3</code>一起安装),您可以通过以下方式获得相同的信息:</p>
^{pr2}$
<p><em>注意:我是Web3.py</em>的维护者</p>