<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `src/error.rs`."><title>error.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-46132b98.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="scrapfly_sdk" data-themes="" data-resource-suffix="" data-rustdoc-version="1.85.0 (4d91de4e4 2025-02-17)" data-channel="1.85.0" data-search-js="search-75f5ac3e.js" data-settings-js="settings-0f613d39.js" ><script src="../../static.files/storage-59e33391.js"></script><script defer src="../../static.files/src-script-56102188.js"></script><script defer src="../../src-files.js"></script><script defer src="../../static.files/main-5f194d8c.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-893ab5e7.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-6580c154.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer"></div><main><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">scrapfly_sdk/</div>error.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap"><div data-nosnippet><pre class="src-line-numbers">
<a href="#1" id="1">1</a>
<a href="#2" id="2">2</a>
<a href="#3" id="3">3</a>
<a href="#4" id="4">4</a>
<a href="#5" id="5">5</a>
<a href="#6" id="6">6</a>
<a href="#7" id="7">7</a>
<a href="#8" id="8">8</a>
<a href="#9" id="9">9</a>
<a href="#10" id="10">10</a>
<a href="#11" id="11">11</a>
<a href="#12" id="12">12</a>
<a href="#13" id="13">13</a>
<a href="#14" id="14">14</a>
<a href="#15" id="15">15</a>
<a href="#16" id="16">16</a>
<a href="#17" id="17">17</a>
<a href="#18" id="18">18</a>
<a href="#19" id="19">19</a>
<a href="#20" id="20">20</a>
<a href="#21" id="21">21</a>
<a href="#22" id="22">22</a>
<a href="#23" id="23">23</a>
<a href="#24" id="24">24</a>
<a href="#25" id="25">25</a>
<a href="#26" id="26">26</a>
<a href="#27" id="27">27</a>
<a href="#28" id="28">28</a>
<a href="#29" id="29">29</a>
<a href="#30" id="30">30</a>
<a href="#31" id="31">31</a>
<a href="#32" id="32">32</a>
<a href="#33" id="33">33</a>
<a href="#34" id="34">34</a>
<a href="#35" id="35">35</a>
<a href="#36" id="36">36</a>
<a href="#37" id="37">37</a>
<a href="#38" id="38">38</a>
<a href="#39" id="39">39</a>
<a href="#40" id="40">40</a>
<a href="#41" id="41">41</a>
<a href="#42" id="42">42</a>
<a href="#43" id="43">43</a>
<a href="#44" id="44">44</a>
<a href="#45" id="45">45</a>
<a href="#46" id="46">46</a>
<a href="#47" id="47">47</a>
<a href="#48" id="48">48</a>
<a href="#49" id="49">49</a>
<a href="#50" id="50">50</a>
<a href="#51" id="51">51</a>
<a href="#52" id="52">52</a>
<a href="#53" id="53">53</a>
<a href="#54" id="54">54</a>
<a href="#55" id="55">55</a>
<a href="#56" id="56">56</a>
<a href="#57" id="57">57</a>
<a href="#58" id="58">58</a>
<a href="#59" id="59">59</a>
<a href="#60" id="60">60</a>
<a href="#61" id="61">61</a>
<a href="#62" id="62">62</a>
<a href="#63" id="63">63</a>
<a href="#64" id="64">64</a>
<a href="#65" id="65">65</a>
<a href="#66" id="66">66</a>
<a href="#67" id="67">67</a>
<a href="#68" id="68">68</a>
<a href="#69" id="69">69</a>
<a href="#70" id="70">70</a>
<a href="#71" id="71">71</a>
<a href="#72" id="72">72</a>
<a href="#73" id="73">73</a>
<a href="#74" id="74">74</a>
<a href="#75" id="75">75</a>
<a href="#76" id="76">76</a>
<a href="#77" id="77">77</a>
<a href="#78" id="78">78</a>
<a href="#79" id="79">79</a>
<a href="#80" id="80">80</a>
<a href="#81" id="81">81</a>
<a href="#82" id="82">82</a>
<a href="#83" id="83">83</a>
<a href="#84" id="84">84</a>
<a href="#85" id="85">85</a>
<a href="#86" id="86">86</a>
<a href="#87" id="87">87</a>
<a href="#88" id="88">88</a>
<a href="#89" id="89">89</a>
<a href="#90" id="90">90</a>
<a href="#91" id="91">91</a>
<a href="#92" id="92">92</a>
<a href="#93" id="93">93</a>
<a href="#94" id="94">94</a>
<a href="#95" id="95">95</a>
<a href="#96" id="96">96</a>
<a href="#97" id="97">97</a>
<a href="#98" id="98">98</a>
<a href="#99" id="99">99</a>
<a href="#100" id="100">100</a>
<a href="#101" id="101">101</a>
<a href="#102" id="102">102</a>
<a href="#103" id="103">103</a>
<a href="#104" id="104">104</a>
<a href="#105" id="105">105</a>
<a href="#106" id="106">106</a>
<a href="#107" id="107">107</a>
<a href="#108" id="108">108</a>
<a href="#109" id="109">109</a>
<a href="#110" id="110">110</a>
<a href="#111" id="111">111</a>
<a href="#112" id="112">112</a>
<a href="#113" id="113">113</a>
<a href="#114" id="114">114</a>
<a href="#115" id="115">115</a>
<a href="#116" id="116">116</a>
<a href="#117" id="117">117</a>
<a href="#118" id="118">118</a>
<a href="#119" id="119">119</a>
<a href="#120" id="120">120</a>
<a href="#121" id="121">121</a>
<a href="#122" id="122">122</a>
<a href="#123" id="123">123</a>
<a href="#124" id="124">124</a>
<a href="#125" id="125">125</a>
<a href="#126" id="126">126</a>
<a href="#127" id="127">127</a>
<a href="#128" id="128">128</a>
<a href="#129" id="129">129</a>
<a href="#130" id="130">130</a>
<a href="#131" id="131">131</a>
<a href="#132" id="132">132</a>
<a href="#133" id="133">133</a>
<a href="#134" id="134">134</a>
<a href="#135" id="135">135</a>
<a href="#136" id="136">136</a>
<a href="#137" id="137">137</a>
<a href="#138" id="138">138</a>
<a href="#139" id="139">139</a>
<a href="#140" id="140">140</a>
<a href="#141" id="141">141</a>
<a href="#142" id="142">142</a>
<a href="#143" id="143">143</a>
<a href="#144" id="144">144</a>
<a href="#145" id="145">145</a>
<a href="#146" id="146">146</a>
<a href="#147" id="147">147</a>
<a href="#148" id="148">148</a>
<a href="#149" id="149">149</a>
<a href="#150" id="150">150</a>
<a href="#151" id="151">151</a>
<a href="#152" id="152">152</a>
<a href="#153" id="153">153</a>
<a href="#154" id="154">154</a>
<a href="#155" id="155">155</a>
<a href="#156" id="156">156</a>
<a href="#157" id="157">157</a>
<a href="#158" id="158">158</a>
<a href="#159" id="159">159</a>
<a href="#160" id="160">160</a>
<a href="#161" id="161">161</a>
<a href="#162" id="162">162</a>
<a href="#163" id="163">163</a>
<a href="#164" id="164">164</a>
<a href="#165" id="165">165</a>
<a href="#166" id="166">166</a>
<a href="#167" id="167">167</a>
<a href="#168" id="168">168</a>
<a href="#169" id="169">169</a>
<a href="#170" id="170">170</a>
<a href="#171" id="171">171</a>
<a href="#172" id="172">172</a>
<a href="#173" id="173">173</a>
<a href="#174" id="174">174</a>
<a href="#175" id="175">175</a>
<a href="#176" id="176">176</a>
<a href="#177" id="177">177</a>
<a href="#178" id="178">178</a>
<a href="#179" id="179">179</a>
<a href="#180" id="180">180</a>
<a href="#181" id="181">181</a>
<a href="#182" id="182">182</a>
<a href="#183" id="183">183</a>
<a href="#184" id="184">184</a>
<a href="#185" id="185">185</a>
<a href="#186" id="186">186</a>
<a href="#187" id="187">187</a>
<a href="#188" id="188">188</a>
<a href="#189" id="189">189</a>
<a href="#190" id="190">190</a>
<a href="#191" id="191">191</a>
<a href="#192" id="192">192</a>
<a href="#193" id="193">193</a>
<a href="#194" id="194">194</a>
<a href="#195" id="195">195</a>
<a href="#196" id="196">196</a>
<a href="#197" id="197">197</a>
<a href="#198" id="198">198</a>
<a href="#199" id="199">199</a>
<a href="#200" id="200">200</a>
<a href="#201" id="201">201</a>
<a href="#202" id="202">202</a>
<a href="#203" id="203">203</a>
<a href="#204" id="204">204</a>
<a href="#205" id="205">205</a>
<a href="#206" id="206">206</a>
<a href="#207" id="207">207</a>
<a href="#208" id="208">208</a>
<a href="#209" id="209">209</a>
<a href="#210" id="210">210</a>
<a href="#211" id="211">211</a>
<a href="#212" id="212">212</a>
<a href="#213" id="213">213</a>
<a href="#214" id="214">214</a>
<a href="#215" id="215">215</a>
<a href="#216" id="216">216</a>
<a href="#217" id="217">217</a>
<a href="#218" id="218">218</a>
<a href="#219" id="219">219</a>
<a href="#220" id="220">220</a>
<a href="#221" id="221">221</a>
<a href="#222" id="222">222</a>
<a href="#223" id="223">223</a>
<a href="#224" id="224">224</a>
<a href="#225" id="225">225</a>
<a href="#226" id="226">226</a>
<a href="#227" id="227">227</a>
<a href="#228" id="228">228</a>
<a href="#229" id="229">229</a>
<a href="#230" id="230">230</a>
<a href="#231" id="231">231</a>
<a href="#232" id="232">232</a>
<a href="#233" id="233">233</a>
<a href="#234" id="234">234</a></pre></div><pre class="rust"><code><span class="doccomment">//! Error types — 1:1 port of `sdk/go/errors.go` + `crawler.go::parseAPIError`.
</span><span class="kw">use </span>serde::Deserialize;
<span class="kw">use </span>thiserror::Error;
<span class="doccomment">/// Structured API error envelope — the JSON shape returned by Scrapfly when
/// a call fails (both `/scrape` `{result: {error: ...}}` envelopes and the
/// generic `{message, code, error_id, http_code}` shape).
</span><span class="attr">#[derive(Debug, Clone, Default)]
</span><span class="kw">pub struct </span>ApiError {
<span class="doccomment">/// Human-readable error message.
</span><span class="kw">pub </span>message: String,
<span class="doccomment">/// Error code identifier (e.g. `ERR::SCRAPE::NETWORK_ERROR`).
</span><span class="kw">pub </span>code: String,
<span class="doccomment">/// HTTP status code from the response.
</span><span class="kw">pub </span>http_status: u16,
<span class="doccomment">/// Documentation URL.
</span><span class="kw">pub </span>documentation_url: String,
<span class="doccomment">/// Hint text (SDK-supplied, context-sensitive).
</span><span class="kw">pub </span>hint: String,
<span class="doccomment">/// Retry-After in milliseconds, parsed from the HTTP header.
</span><span class="kw">pub </span>retry_after_ms: u64,
}
<span class="kw">impl </span>std::fmt::Display <span class="kw">for </span>ApiError {
<span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>std::fmt::Formatter<<span class="lifetime">'_</span>>) -> std::fmt::Result {
<span class="macro">write!</span>(
f,
<span class="string">"API Error: {} (code: {}, status: {}, docs: {})"</span>,
<span class="self">self</span>.message, <span class="self">self</span>.code, <span class="self">self</span>.http_status, <span class="self">self</span>.documentation_url
)<span class="question-mark">?</span>;
<span class="kw">if </span><span class="self">self</span>.retry_after_ms > <span class="number">0 </span>{
<span class="macro">write!</span>(f, <span class="string">", retry_after_ms: {}"</span>, <span class="self">self</span>.retry_after_ms)<span class="question-mark">?</span>;
}
<span class="prelude-val">Ok</span>(())
}
}
<span class="doccomment">/// All errors raised by `scrapfly-sdk`.
</span><span class="attr">#[derive(Debug, Error)]
</span><span class="kw">pub enum </span>ScrapflyError {
<span class="doccomment">/// Transport-level failure (connect, TLS, timeout …).
</span><span class="attr">#[error(<span class="string">"transport: {0}"</span>)]
</span>Transport(<span class="attr">#[from] </span>reqwest::Error),
<span class="doccomment">/// JSON (de)serialization failure.
</span><span class="attr">#[error(<span class="string">"json: {0}"</span>)]
</span>Json(<span class="attr">#[from] </span>serde_json::Error),
<span class="doccomment">/// Invalid configuration (builder validation).
</span><span class="attr">#[error(<span class="string">"config: {0}"</span>)]
</span>Config(String),
<span class="doccomment">/// Invalid or empty API key.
</span><span class="attr">#[error(<span class="string">"invalid key, must be a non-empty string"</span>)]
</span>BadApiKey,
<span class="doccomment">/// Structured API error envelope.
</span><span class="attr">#[error(<span class="string">"api error [{}] {}"</span>, .<span class="number">0</span>.code, .<span class="number">0</span>.message)]
</span>Api(ApiError),
<span class="doccomment">/// 4xx from Scrapfly itself.
</span><span class="attr">#[error(<span class="string">"API http client error: {0}"</span>)]
</span>ApiClient(ApiError),
<span class="doccomment">/// 5xx from Scrapfly itself.
</span><span class="attr">#[error(<span class="string">"API http server error: {0}"</span>)]
</span>ApiServer(ApiError),
<span class="doccomment">/// 4xx from the upstream target.
</span><span class="attr">#[error(<span class="string">"upstream http client error: {0}"</span>)]
</span>UpstreamClient(ApiError),
<span class="doccomment">/// 5xx from the upstream target.
</span><span class="attr">#[error(<span class="string">"upstream http server error: {0}"</span>)]
</span>UpstreamServer(ApiError),
<span class="doccomment">/// Rate limited (HTTP 429).
</span><span class="attr">#[error(<span class="string">"too many requests: {0}"</span>)]
</span>TooManyRequests(ApiError),
<span class="doccomment">/// Quota exhausted.
</span><span class="attr">#[error(<span class="string">"quota limit reached: {0}"</span>)]
</span>QuotaLimitReached(ApiError),
<span class="doccomment">/// Scrape failed with an `ERR::SCRAPE::*` status.
</span><span class="attr">#[error(<span class="string">"scrape failed: {0}"</span>)]
</span>ScrapeFailed(ApiError),
<span class="doccomment">/// Proxy failure (`ERR::PROXY::*`).
</span><span class="attr">#[error(<span class="string">"proxy error: {0}"</span>)]
</span>ProxyFailed(ApiError),
<span class="doccomment">/// Anti-bot bypass failure (`ERR::ASP::*`).
</span><span class="attr">#[error(<span class="string">"ASP bypass error: {0}"</span>)]
</span>AspBypassFailed(ApiError),
<span class="doccomment">/// Schedule error.
</span><span class="attr">#[error(<span class="string">"schedule error: {0}"</span>)]
</span>ScheduleFailed(ApiError),
<span class="doccomment">/// Webhook delivery error.
</span><span class="attr">#[error(<span class="string">"webhook error: {0}"</span>)]
</span>WebhookFailed(ApiError),
<span class="doccomment">/// Session error.
</span><span class="attr">#[error(<span class="string">"session error: {0}"</span>)]
</span>SessionFailed(ApiError),
<span class="doccomment">/// Screenshot API error.
</span><span class="attr">#[error(<span class="string">"screenshot API error: {0}"</span>)]
</span>ScreenshotApiFailed(ApiError),
<span class="doccomment">/// Extraction API error.
</span><span class="attr">#[error(<span class="string">"extraction API error: {0}"</span>)]
</span>ExtractionApiFailed(ApiError),
<span class="doccomment">/// Crawler API error.
</span><span class="attr">#[error(<span class="string">"crawler error: {0}"</span>)]
</span>CrawlerFailed(ApiError),
<span class="doccomment">/// Unhandled API error response.
</span><span class="attr">#[error(<span class="string">"unhandled API error response: {0}"</span>)]
</span>UnhandledApiResponse(ApiError),
<span class="doccomment">/// `Crawl` helper called before `start()`.
</span><span class="attr">#[error(<span class="string">"crawler not started, call start() first"</span>)]
</span>CrawlerNotStarted,
<span class="doccomment">/// `Crawl::start()` called twice.
</span><span class="attr">#[error(<span class="string">"crawler already started"</span>)]
</span>CrawlerAlreadyStarted,
<span class="doccomment">/// `Crawl::wait()` observed CANCELLED terminal state.
</span><span class="attr">#[error(<span class="string">"crawler was cancelled"</span>)]
</span>CrawlerCancelled,
<span class="doccomment">/// `Crawl::wait()` exceeded the caller's deadline.
</span><span class="attr">#[error(<span class="string">"crawler wait timed out"</span>)]
</span>CrawlerTimeout,
<span class="doccomment">/// Server returned a content-type the SDK didn't expect.
</span><span class="attr">#[error(<span class="string">"unexpected response format: {0}"</span>)]
</span>UnexpectedResponseFormat(String),
<span class="doccomment">/// Invalid content type for this operation.
</span><span class="attr">#[error(<span class="string">"invalid content type for this operation: {0}"</span>)]
</span>ContentType(String),
<span class="doccomment">/// I/O failure (example: save screenshot to disk).
</span><span class="attr">#[error(<span class="string">"io: {0}"</span>)]
</span>Io(<span class="attr">#[from] </span>std::io::Error),
}
<span class="attr">#[derive(Debug, Deserialize, Default)]
</span><span class="kw">struct </span>ErrorEnvelope {
<span class="attr">#[serde(default)]
</span>message: String,
<span class="attr">#[serde(default)]
</span>code: String,
<span class="attr">#[serde(default)]
#[allow(dead_code)]
</span>error_id: String,
<span class="attr">#[serde(default)]
#[allow(dead_code)]
</span>http_code: u16,
}
<span class="doccomment">/// Build a [`ScrapflyError`] from a non-2xx HTTP response.
///
/// Ports the switch logic from `sdk/go/client.go::handleAPIErrorResponse` +
/// `sdk/go/crawler.go::handleCrawlerErrorResponse`: categorizes the error based
/// on HTTP status + `code` field in the JSON envelope, surfaces the right
/// sentinel variant, attaches a contextual hint, and parses `Retry-After`.
</span><span class="kw">pub fn </span>from_response(
status: u16,
body: <span class="kw-2">&</span>[u8],
retry_after_ms: u64,
is_crawler: bool,
) -> ScrapflyError {
<span class="kw">let </span>envelope: ErrorEnvelope = serde_json::from_slice(body).unwrap_or_default();
<span class="kw">let </span>msg = <span class="kw">if </span>envelope.message.is_empty() {
<span class="macro">format!</span>(<span class="string">"API returned status {}"</span>, status)
} <span class="kw">else </span>{
envelope.message.clone()
};
<span class="kw">let </span><span class="kw-2">mut </span>err = ApiError {
message: msg,
code: envelope.code.clone(),
http_status: status,
documentation_url: String::new(),
hint: String::new(),
retry_after_ms,
};
<span class="comment">// HTTP-status-based hint + early dispatch.
</span><span class="kw">match </span>status {
<span class="number">401 </span>=> err.hint = <span class="string">"Provide a valid API key via ?key=... or Bearer token."</span>.into(),
<span class="number">429 </span>=> {
err.hint =
<span class="string">"Back off and retry after the indicated delay, or reduce concurrency/scope."</span>.into();
<span class="kw">return </span>ScrapflyError::TooManyRequests(err);
}
<span class="number">422 </span>=> {
<span class="kw">let </span>body_str = String::from_utf8_lossy(body);
<span class="kw">if </span>body_str.contains(<span class="string">"SCREENSHOT"</span>) {
err.hint =
<span class="string">"Check screenshot parameters (format/capture/resolution) and upstream site readiness."
</span>.into();
<span class="kw">return </span>ScrapflyError::ScreenshotApiFailed(err);
}
<span class="kw">if </span>body_str.contains(<span class="string">"EXTRACTION"</span>) {
err.hint =
<span class="string">"Check content_type, body encoding, and template/prompt validity."</span>.into();
<span class="kw">return </span>ScrapflyError::ExtractionApiFailed(err);
}
}
<span class="kw">_ </span>=> {}
}
<span class="comment">// Crawler-resource errors get their own bucket.
</span><span class="kw">if </span>is_crawler && envelope.code.contains(<span class="string">"::CRAWLER::"</span>) {
<span class="kw">return </span>ScrapflyError::CrawlerFailed(err);
}
<span class="comment">// Code-based dispatch (`ERR::RESOURCE::*`).
</span><span class="kw">if let </span><span class="prelude-val">Some</span>(resource) = envelope.code.split(<span class="string">"::"</span>).nth(<span class="number">1</span>) {
<span class="kw">match </span>resource {
<span class="string">"SCRAPE" </span>=> <span class="kw">return </span>ScrapflyError::ScrapeFailed(err),
<span class="string">"PROXY" </span>=> <span class="kw">return </span>ScrapflyError::ProxyFailed(err),
<span class="string">"ASP" </span>=> <span class="kw">return </span>ScrapflyError::AspBypassFailed(err),
<span class="string">"SCHEDULE" </span>=> <span class="kw">return </span>ScrapflyError::ScheduleFailed(err),
<span class="string">"WEBHOOK" </span>=> <span class="kw">return </span>ScrapflyError::WebhookFailed(err),
<span class="string">"SESSION" </span>=> <span class="kw">return </span>ScrapflyError::SessionFailed(err),
<span class="string">"THROTTLE" </span>=> <span class="kw">return </span>ScrapflyError::TooManyRequests(err),
<span class="string">"QUOTA" </span>=> <span class="kw">return </span>ScrapflyError::QuotaLimitReached(err),
<span class="string">"CRAWLER" </span>=> <span class="kw">return </span>ScrapflyError::CrawlerFailed(err),
<span class="kw">_ </span>=> {}
}
}
<span class="comment">// HTTP-status-based fallback.
</span><span class="kw">match </span>status {
<span class="number">400</span>..=<span class="number">499 </span>=> ScrapflyError::ApiClient(err),
<span class="number">500</span>..=<span class="number">599 </span>=> ScrapflyError::ApiServer(err),
<span class="kw">_ </span>=> ScrapflyError::UnhandledApiResponse(err),
}
}
<span class="doccomment">/// Parse the `Retry-After` header value into milliseconds.
/// Supports integer seconds; HTTP-date is best-effort not parsed (returns 0).
</span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>parse_retry_after(value: <span class="prelude-ty">Option</span><<span class="kw-2">&</span>str>) -> u64 {
<span class="kw">match </span>value {
<span class="prelude-val">Some</span>(v) => v
.trim()
.parse::<u64>()
.map(|secs| secs.saturating_mul(<span class="number">1000</span>))
.unwrap_or(<span class="number">0</span>),
<span class="prelude-val">None </span>=> <span class="number">0</span>,
}
}
</code></pre></div></section></main></body></html>