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<div class="title">linearize-hashes.py</div> </div>
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<a href="linearize-hashes_8py.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"><a class="line" href="namespacelinearize-hashes.html"> 1</a></span>&#160;<span class="comment">#!/usr/bin/python</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">#</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment"># linearize-hashes.py: List blocks in a linear, no-fork version of the chain.</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment">#</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"># Copyright (c) 2013-2014 The Bitcoin Core developers</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"># Distributed under the MIT software license, see the accompanying</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"># file COPYING or http://www.opensource.org/licenses/mit-license.php.</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment">#</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;</div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="keyword">from</span> __future__ <span class="keyword">import</span> print_function</div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="keyword">import</span> json</div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="keyword">import</span> struct</div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="keyword">import</span> re</div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="keyword">import</span> base64</div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="keyword">import</span> httplib</div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="keyword">import</span> sys</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;</div><div class="line"><a name="l00018"></a><span class="lineno"><a class="line" href="namespacelinearize-hashes.html#ae0177a0a662929838594f8aec0fa51ae"> 18</a></span>&#160;settings = {}</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;</div><div class="line"><a name="l00020"></a><span class="lineno"><a class="line" href="classlinearize-hashes_1_1BitcoinRPC.html"> 20</a></span>&#160;<span class="keyword">class </span><a class="code" href="classlinearize-hashes_1_1BitcoinRPC.html">BitcoinRPC</a>:</div><div class="line"><a name="l00021"></a><span class="lineno"><a class="line" href="classlinearize-hashes_1_1BitcoinRPC.html#a2be458e7f97eafe02a03de079e741162"> 21</a></span>&#160; <span class="keyword">def </span><a class="code" href="classlinearize-hashes_1_1BitcoinRPC.html#a2be458e7f97eafe02a03de079e741162">__init__</a>(self, host, port, username, password):</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160; authpair = <span class="stringliteral">&quot;%s:%s&quot;</span> % (username, password)</div><div class="line"><a name="l00023"></a><span class="lineno"><a class="line" href="classlinearize-hashes_1_1BitcoinRPC.html#ab2bf06506f60b762b4ff71b0a66bfd41"> 23</a></span>&#160; self.<a class="code" href="classlinearize-hashes_1_1BitcoinRPC.html#ab2bf06506f60b762b4ff71b0a66bfd41">authhdr</a> = <span class="stringliteral">&quot;Basic %s&quot;</span> % (base64.b64encode(authpair))</div><div class="line"><a name="l00024"></a><span class="lineno"><a class="line" href="classlinearize-hashes_1_1BitcoinRPC.html#a24c9bb48832a22d6c3373ea2427d9248"> 24</a></span>&#160; self.<a class="code" href="classlinearize-hashes_1_1BitcoinRPC.html#a24c9bb48832a22d6c3373ea2427d9248">conn</a> = httplib.HTTPConnection(host, port, <span class="keyword">False</span>, 30)</div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;</div><div class="line"><a name="l00026"></a><span class="lineno"><a class="line" href="classlinearize-hashes_1_1BitcoinRPC.html#a3f317d492c49273cbdd85034f98e21c8"> 26</a></span>&#160; <span class="keyword">def </span><a class="code" href="classlinearize-hashes_1_1BitcoinRPC.html#a3f317d492c49273cbdd85034f98e21c8">execute</a>(self, obj):</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; self.<a class="code" href="classlinearize-hashes_1_1BitcoinRPC.html#a24c9bb48832a22d6c3373ea2427d9248">conn</a>.request(<span class="stringliteral">&#39;POST&#39;</span>, <span class="stringliteral">&#39;/&#39;</span>, json.dumps(obj),</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; { <span class="stringliteral">&#39;Authorization&#39;</span> : self.<a class="code" href="classlinearize-hashes_1_1BitcoinRPC.html#ab2bf06506f60b762b4ff71b0a66bfd41">authhdr</a>,</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160; <span class="stringliteral">&#39;Content-type&#39;</span> : <span class="stringliteral">&#39;application/json&#39;</span> })</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; resp = self.<a class="code" href="classlinearize-hashes_1_1BitcoinRPC.html#a24c9bb48832a22d6c3373ea2427d9248">conn</a>.getresponse()</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; <span class="keywordflow">if</span> resp <span class="keywordflow">is</span> <span class="keywordtype">None</span>:</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; print(<span class="stringliteral">&quot;JSON-RPC: no response&quot;</span>, file=sys.stderr)</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160; <span class="keywordflow">return</span> <span class="keywordtype">None</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; body = resp.read()</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; resp_obj = json.loads(body)</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; <span class="keywordflow">return</span> resp_obj</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; @staticmethod</div><div class="line"><a name="l00041"></a><span class="lineno"><a class="line" href="classlinearize-hashes_1_1BitcoinRPC.html#ad83d179dbe60a772e91c3751e23fd5b7"> 41</a></span>&#160; <span class="keyword">def </span><a class="code" href="classlinearize-hashes_1_1BitcoinRPC.html#ad83d179dbe60a772e91c3751e23fd5b7">build_request</a>(idx, method, params):</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; obj = { <span class="stringliteral">&#39;version&#39;</span> : <span class="stringliteral">&#39;1.1&#39;</span>,</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; <span class="stringliteral">&#39;method&#39;</span> : method,</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; <span class="stringliteral">&#39;id&#39;</span> : idx }</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; <span class="keywordflow">if</span> params <span class="keywordflow">is</span> <span class="keywordtype">None</span>:</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; obj[<span class="stringliteral">&#39;params&#39;</span>] = []</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <span class="keywordflow">else</span>:</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; obj[<span class="stringliteral">&#39;params&#39;</span>] = params</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; <span class="keywordflow">return</span> obj</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160;</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; @staticmethod</div><div class="line"><a name="l00052"></a><span class="lineno"><a class="line" href="classlinearize-hashes_1_1BitcoinRPC.html#a4b70ae29588389d5471bf4ec4affcda6"> 52</a></span>&#160; <span class="keyword">def </span><a class="code" href="classlinearize-hashes_1_1BitcoinRPC.html#a4b70ae29588389d5471bf4ec4affcda6">response_is_error</a>(resp_obj):</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="keywordflow">return</span> <span class="stringliteral">&#39;error&#39;</span> <span class="keywordflow">in</span> resp_obj <span class="keywordflow">and</span> resp_obj[<span class="stringliteral">&#39;error&#39;</span>] <span class="keywordflow">is</span> <span class="keywordflow">not</span> <span class="keywordtype">None</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160;</div><div class="line"><a name="l00055"></a><span class="lineno"><a class="line" href="namespacelinearize-hashes.html#a52920bd09c47ad30e466bf1ac71929c4"> 55</a></span>&#160;<span class="keyword">def </span><a class="code" href="namespacelinearize-hashes.html#a52920bd09c47ad30e466bf1ac71929c4">get_block_hashes</a>(settings, max_blocks_per_call=10000):</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; rpc = <a class="code" href="classlinearize-hashes_1_1BitcoinRPC.html">BitcoinRPC</a>(settings[<span class="stringliteral">&#39;host&#39;</span>], settings[<span class="stringliteral">&#39;port&#39;</span>],</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; settings[<span class="stringliteral">&#39;rpcuser&#39;</span>], settings[<span class="stringliteral">&#39;rpcpassword&#39;</span>])</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; height = settings[<span class="stringliteral">&#39;min_height&#39;</span>]</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="keywordflow">while</span> height &lt; settings[<span class="stringliteral">&#39;max_height&#39;</span>]+1:</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; num_blocks = min(settings[<span class="stringliteral">&#39;max_height&#39;</span>]+1-height, max_blocks_per_call)</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; batch = []</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; <span class="keywordflow">for</span> x <span class="keywordflow">in</span> range(num_blocks):</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; batch.append(rpc.build_request(x, <span class="stringliteral">&#39;getblockhash&#39;</span>, [height + x]))</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160;</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; reply = rpc.execute(batch)</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <span class="keywordflow">for</span> x,resp_obj <span class="keywordflow">in</span> enumerate(reply):</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; <span class="keywordflow">if</span> rpc.response_is_error(resp_obj):</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; print(<span class="stringliteral">&#39;JSON-RPC: error at height&#39;</span>, height+x, <span class="stringliteral">&#39;: &#39;</span>, resp_obj[<span class="stringliteral">&#39;error&#39;</span>], file=sys.stderr)</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; exit(1)</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; assert(resp_obj[<span class="stringliteral">&#39;id&#39;</span>] == x) <span class="comment"># assume replies are in-sequence</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; print(resp_obj[<span class="stringliteral">&#39;result&#39;</span>])</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160;</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; height += num_blocks</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160;</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160;<span class="keywordflow">if</span> __name__ == <span class="stringliteral">&#39;__main__&#39;</span>:</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="keywordflow">if</span> len(sys.argv) != 2:</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; print(<span class="stringliteral">&quot;Usage: linearize-hashes.py CONFIG-FILE&quot;</span>)</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; sys.exit(1)</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;</div><div class="line"><a name="l00082"></a><span class="lineno"><a class="line" href="namespacelinearize-hashes.html#a068e41cc6aabca5baf9c52954ce839d7"> 82</a></span>&#160; f = open(sys.argv[1])</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <span class="keywordflow">for</span> line <span class="keywordflow">in</span> f:</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <span class="comment"># skip comment lines</span></div><div class="line"><a name="l00085"></a><span class="lineno"><a class="line" href="namespacelinearize-hashes.html#a02b8e3486a452828df78d20f79e63d18"> 85</a></span>&#160; m = re.search(<span class="stringliteral">&#39;^\s*#&#39;</span>, line)</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; <span class="keywordflow">if</span> m:</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <span class="keywordflow">continue</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160;</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; <span class="comment"># parse key=value lines</span></div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; m = re.search(<span class="stringliteral">&#39;^(\w+)\s*=\s*(\S.*)$&#39;</span>, line)</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <span class="keywordflow">if</span> m <span class="keywordflow">is</span> <span class="keywordtype">None</span>:</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <span class="keywordflow">continue</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; settings[m.group(1)] = m.group(2)</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; f.close()</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160;</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; <span class="keywordflow">if</span> <span class="stringliteral">&#39;host&#39;</span> <span class="keywordflow">not</span> <span class="keywordflow">in</span> settings:</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; settings[<span class="stringliteral">&#39;host&#39;</span>] = <span class="stringliteral">&#39;127.0.0.1&#39;</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; <span class="keywordflow">if</span> <span class="stringliteral">&#39;port&#39;</span> <span class="keywordflow">not</span> <span class="keywordflow">in</span> settings:</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; settings[<span class="stringliteral">&#39;port&#39;</span>] = 9998</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; <span class="keywordflow">if</span> <span class="stringliteral">&#39;min_height&#39;</span> <span class="keywordflow">not</span> <span class="keywordflow">in</span> settings:</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; settings[<span class="stringliteral">&#39;min_height&#39;</span>] = 0</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; <span class="keywordflow">if</span> <span class="stringliteral">&#39;max_height&#39;</span> <span class="keywordflow">not</span> <span class="keywordflow">in</span> settings:</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; settings[<span class="stringliteral">&#39;max_height&#39;</span>] = 313000</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; <span class="keywordflow">if</span> <span class="stringliteral">&#39;rpcuser&#39;</span> <span class="keywordflow">not</span> <span class="keywordflow">in</span> settings <span class="keywordflow">or</span> <span class="stringliteral">&#39;rpcpassword&#39;</span> <span class="keywordflow">not</span> <span class="keywordflow">in</span> settings:</div><div class="line"><a name="l00105"></a><span class="lineno"><a class="line" href="namespacelinearize-hashes.html#afd70e9fbab8a06b49534d0ae39afb23b"> 105</a></span>&#160; print(<span class="stringliteral">&quot;Missing username and/or password in cfg file&quot;</span>, file=stderr)</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; sys.exit(1)</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160;</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; settings[<span class="stringliteral">&#39;port&#39;</span>] = int(settings[<span class="stringliteral">&#39;port&#39;</span>])</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; settings[<span class="stringliteral">&#39;min_height&#39;</span>] = int(settings[<span class="stringliteral">&#39;min_height&#39;</span>])</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; settings[<span class="stringliteral">&#39;max_height&#39;</span>] = int(settings[<span class="stringliteral">&#39;max_height&#39;</span>])</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160;</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; <a class="code" href="namespacelinearize-hashes.html#a52920bd09c47ad30e466bf1ac71929c4">get_block_hashes</a>(settings)</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160;</div><div class="ttc" id="namespacelinearize-hashes_html_a52920bd09c47ad30e466bf1ac71929c4"><div class="ttname"><a href="namespacelinearize-hashes.html#a52920bd09c47ad30e466bf1ac71929c4">linearize-hashes.get_block_hashes</a></div><div class="ttdeci">def get_block_hashes(settings, max_blocks_per_call=10000)</div><div class="ttdef"><b>Definition:</b> <a href="linearize-hashes_8py_source.html#l00055">linearize-hashes.py:55</a></div></div>
<div class="ttc" id="classlinearize-hashes_1_1BitcoinRPC_html_a4b70ae29588389d5471bf4ec4affcda6"><div class="ttname"><a href="classlinearize-hashes_1_1BitcoinRPC.html#a4b70ae29588389d5471bf4ec4affcda6">linearize-hashes.BitcoinRPC.response_is_error</a></div><div class="ttdeci">def response_is_error(resp_obj)</div><div class="ttdef"><b>Definition:</b> <a href="linearize-hashes_8py_source.html#l00052">linearize-hashes.py:52</a></div></div>
<div class="ttc" id="classlinearize-hashes_1_1BitcoinRPC_html_ad83d179dbe60a772e91c3751e23fd5b7"><div class="ttname"><a href="classlinearize-hashes_1_1BitcoinRPC.html#ad83d179dbe60a772e91c3751e23fd5b7">linearize-hashes.BitcoinRPC.build_request</a></div><div class="ttdeci">def build_request(idx, method, params)</div><div class="ttdef"><b>Definition:</b> <a href="linearize-hashes_8py_source.html#l00041">linearize-hashes.py:41</a></div></div>
<div class="ttc" id="classlinearize-hashes_1_1BitcoinRPC_html_a24c9bb48832a22d6c3373ea2427d9248"><div class="ttname"><a href="classlinearize-hashes_1_1BitcoinRPC.html#a24c9bb48832a22d6c3373ea2427d9248">linearize-hashes.BitcoinRPC.conn</a></div><div class="ttdeci">conn</div><div class="ttdef"><b>Definition:</b> <a href="linearize-hashes_8py_source.html#l00024">linearize-hashes.py:24</a></div></div>
<div class="ttc" id="classlinearize-hashes_1_1BitcoinRPC_html_ab2bf06506f60b762b4ff71b0a66bfd41"><div class="ttname"><a href="classlinearize-hashes_1_1BitcoinRPC.html#ab2bf06506f60b762b4ff71b0a66bfd41">linearize-hashes.BitcoinRPC.authhdr</a></div><div class="ttdeci">authhdr</div><div class="ttdef"><b>Definition:</b> <a href="linearize-hashes_8py_source.html#l00023">linearize-hashes.py:23</a></div></div>
<div class="ttc" id="classlinearize-hashes_1_1BitcoinRPC_html"><div class="ttname"><a href="classlinearize-hashes_1_1BitcoinRPC.html">linearize-hashes.BitcoinRPC</a></div><div class="ttdef"><b>Definition:</b> <a href="linearize-hashes_8py_source.html#l00020">linearize-hashes.py:20</a></div></div>
<div class="ttc" id="classlinearize-hashes_1_1BitcoinRPC_html_a3f317d492c49273cbdd85034f98e21c8"><div class="ttname"><a href="classlinearize-hashes_1_1BitcoinRPC.html#a3f317d492c49273cbdd85034f98e21c8">linearize-hashes.BitcoinRPC.execute</a></div><div class="ttdeci">def execute(self, obj)</div><div class="ttdef"><b>Definition:</b> <a href="linearize-hashes_8py_source.html#l00026">linearize-hashes.py:26</a></div></div>
<div class="ttc" id="classlinearize-hashes_1_1BitcoinRPC_html_a2be458e7f97eafe02a03de079e741162"><div class="ttname"><a href="classlinearize-hashes_1_1BitcoinRPC.html#a2be458e7f97eafe02a03de079e741162">linearize-hashes.BitcoinRPC.__init__</a></div><div class="ttdeci">def __init__(self, host, port, username, password)</div><div class="ttdef"><b>Definition:</b> <a href="linearize-hashes_8py_source.html#l00021">linearize-hashes.py:21</a></div></div>
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