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twmht 2019-05-28 21:46:50 +08:00
parent 7304c207f6
commit 381bcf92a3
5 changed files with 45 additions and 47 deletions
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8
_sources/index.rst.txt
View file

@ -16,16 +16,16 @@ Python bindings to the C++ interface of http://rocksdb.org/ using pybind11::
assert(s.ok()) assert(s.ok())
# put # put
opts = pyrocksdb.WriteOptions() opts = pyrocksdb.WriteOptions()
s = db.put(opts, "key1", "value1") s = db.put(opts, b"key1", b"value1")
assert (s.ok()) assert (s.ok())
# get # get
opts = pyrocksdb.ReadOptions() opts = pyrocksdb.ReadOptions()
blob = db.get(opts, "key1") blob = db.get(opts, b"key1")
print (blob.data) # value1 print (blob.data) # b"value1"
print (blob.status.ok()) # true print (blob.status.ok()) # true
#delete #delete
opts = pyrocksdb.WriteOptions() opts = pyrocksdb.WriteOptions()
s = db.delete(opts, "key1") s = db.delete(opts, b"key1")
assert(s.ok()) assert(s.ok())
db.close() db.close()

37
_sources/tutorial/index.rst.txt
View file

@ -10,9 +10,9 @@ apply them in a single operation ::
update = pyrocksdb.WriteBatch() update = pyrocksdb.WriteBatch()
# collect the operations # collect the operations
update.put('key1', 'value1') update.put(b'key1', b'value1')
update.put('key2', 'value2') update.put(b'key2', b'value2')
update.delete('key1') update.delete(b'key1')
opts = pyrocksdb.WriteOptions() opts = pyrocksdb.WriteOptions()
# Apply these operatios in a single operation # Apply these operatios in a single operation
@ -20,11 +20,11 @@ apply them in a single operation ::
assert s.ok() assert s.ok()
opts = pyrocksdb.ReadOptions() opts = pyrocksdb.ReadOptions()
blob = db.get(opts, 'key1') blob = db.get(opts, b'key1')
assert blob.status.is_not_found() assert blob.status.is_not_found()
blob = db.get(opts, 'key2') blob = db.get(opts, b'key2')
assert blob.status.ok() assert blob.status.ok()
assert blob.data == 'value2' assert blob.data == b'value2'
db.close() db.close()
@ -35,36 +35,35 @@ Iterators behave slightly different than expected. Per default they are not
valid. So you have to call one of its seek methods first :: valid. So you have to call one of its seek methods first ::
opts = pyrocksdb.WriteOptions() opts = pyrocksdb.WriteOptions()
s = {'key1': 'value1', 'key2': 'value2', 'key3': 'value3'} s = {b'key1': b'value1', b'key2': b'value2', b'key3': b'value3'}
for k, v in s.items(): for k, v in s.items():
db.put(opts, k, v) db.put(opts, k, v)
opts = pyrocksdb.ReadOptions() opts = pyrocksdb.ReadOptions()
it = db.iterator(opts) it = db.iterator(opts)
# call this first
it.seek_to_first() it.seek_to_first()
assert it.status().ok() assert it.status().ok()
assert it.valid() assert it.valid()
for k, v in s.items(): for k, v in s.items():
assert it.key().data() == k assert it.key() == k
assert it.value().data() == v assert it.value() == v
it.next() it.next()
assert not it.valid() assert not it.valid()
it.seek('key1') it.seek(b'key1')
assert it.valid() assert it.valid()
assert it.key().data() == 'key1' assert it.key() == b'key1'
assert it.value().data() == 'value1' assert it.value() == b'value1'
it.seek('key2') it.seek(b'key2')
assert it.valid() assert it.valid()
assert it.key().data() == 'key2' assert it.key() == b'key2'
assert it.value().data() == 'value2' assert it.value() == b'value2'
it.seek('key4') it.seek(b'key4')
assert not it.valid() assert not it.valid()
it.seek_for_prev('key0') it.seek_for_prev(b'key0')
assert not it.valid() assert not it.valid()
it.seek_for_prev('key4') it.seek_for_prev(b'key4')
assert it.valid() assert it.valid()

8
index.html
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@ -47,16 +47,16 @@
<span class="k">assert</span><span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">ok</span><span class="p">())</span> <span class="k">assert</span><span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">ok</span><span class="p">())</span>
<span class="c1"># put</span> <span class="c1"># put</span>
<span class="n">opts</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">WriteOptions</span><span class="p">()</span> <span class="n">opts</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">WriteOptions</span><span class="p">()</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">db</span><span class="o">.</span><span class="n">put</span><span class="p">(</span><span class="n">opts</span><span class="p">,</span> <span class="s2">&quot;key1&quot;</span><span class="p">,</span> <span class="s2">&quot;value1&quot;</span><span class="p">)</span> <span class="n">s</span> <span class="o">=</span> <span class="n">db</span><span class="o">.</span><span class="n">put</span><span class="p">(</span><span class="n">opts</span><span class="p">,</span> <span class="sa">b</span><span class="s2">&quot;key1&quot;</span><span class="p">,</span> <span class="sa">b</span><span class="s2">&quot;value1&quot;</span><span class="p">)</span>
<span class="k">assert</span> <span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">ok</span><span class="p">())</span> <span class="k">assert</span> <span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">ok</span><span class="p">())</span>
<span class="c1"># get</span> <span class="c1"># get</span>
<span class="n">opts</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">ReadOptions</span><span class="p">()</span> <span class="n">opts</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">ReadOptions</span><span class="p">()</span>
<span class="n">blob</span> <span class="o">=</span> <span class="n">db</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">opts</span><span class="p">,</span> <span class="s2">&quot;key1&quot;</span><span class="p">)</span> <span class="n">blob</span> <span class="o">=</span> <span class="n">db</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">opts</span><span class="p">,</span> <span class="sa">b</span><span class="s2">&quot;key1&quot;</span><span class="p">)</span>
<span class="nb">print</span> <span class="p">(</span><span class="n">blob</span><span class="o">.</span><span class="n">data</span><span class="p">)</span> <span class="c1"># value1</span> <span class="nb">print</span> <span class="p">(</span><span class="n">blob</span><span class="o">.</span><span class="n">data</span><span class="p">)</span> <span class="c1"># b&quot;value1&quot;</span>
<span class="nb">print</span> <span class="p">(</span><span class="n">blob</span><span class="o">.</span><span class="n">status</span><span class="o">.</span><span class="n">ok</span><span class="p">())</span> <span class="c1"># true</span> <span class="nb">print</span> <span class="p">(</span><span class="n">blob</span><span class="o">.</span><span class="n">status</span><span class="o">.</span><span class="n">ok</span><span class="p">())</span> <span class="c1"># true</span>
<span class="c1">#delete</span> <span class="c1">#delete</span>
<span class="n">opts</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">WriteOptions</span><span class="p">()</span> <span class="n">opts</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">WriteOptions</span><span class="p">()</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">db</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="n">opts</span><span class="p">,</span> <span class="s2">&quot;key1&quot;</span><span class="p">)</span> <span class="n">s</span> <span class="o">=</span> <span class="n">db</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="n">opts</span><span class="p">,</span> <span class="sa">b</span><span class="s2">&quot;key1&quot;</span><span class="p">)</span>
<span class="k">assert</span><span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">ok</span><span class="p">())</span> <span class="k">assert</span><span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">ok</span><span class="p">())</span>
<span class="n">db</span><span class="o">.</span><span class="n">close</span><span class="p">()</span> <span class="n">db</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
</pre></div> </pre></div>

2
searchindex.js
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@ -1 +1 @@
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37
tutorial/index.html
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@ -41,9 +41,9 @@ apply them in a single operation</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">update</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">WriteBatch</span><span class="p">()</span> <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">update</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">WriteBatch</span><span class="p">()</span>
<span class="c1"># collect the operations</span> <span class="c1"># collect the operations</span>
<span class="n">update</span><span class="o">.</span><span class="n">put</span><span class="p">(</span><span class="s1">&#39;key1&#39;</span><span class="p">,</span> <span class="s1">&#39;value1&#39;</span><span class="p">)</span> <span class="n">update</span><span class="o">.</span><span class="n">put</span><span class="p">(</span><span class="sa">b</span><span class="s1">&#39;key1&#39;</span><span class="p">,</span> <span class="sa">b</span><span class="s1">&#39;value1&#39;</span><span class="p">)</span>
<span class="n">update</span><span class="o">.</span><span class="n">put</span><span class="p">(</span><span class="s1">&#39;key2&#39;</span><span class="p">,</span> <span class="s1">&#39;value2&#39;</span><span class="p">)</span> <span class="n">update</span><span class="o">.</span><span class="n">put</span><span class="p">(</span><span class="sa">b</span><span class="s1">&#39;key2&#39;</span><span class="p">,</span> <span class="sa">b</span><span class="s1">&#39;value2&#39;</span><span class="p">)</span>
<span class="n">update</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="s1">&#39;key1&#39;</span><span class="p">)</span> <span class="n">update</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="sa">b</span><span class="s1">&#39;key1&#39;</span><span class="p">)</span>
<span class="n">opts</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">WriteOptions</span><span class="p">()</span> <span class="n">opts</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">WriteOptions</span><span class="p">()</span>
<span class="c1"># Apply these operatios in a single operation</span> <span class="c1"># Apply these operatios in a single operation</span>
@ -51,11 +51,11 @@ apply them in a single operation</p>
<span class="k">assert</span> <span class="n">s</span><span class="o">.</span><span class="n">ok</span><span class="p">()</span> <span class="k">assert</span> <span class="n">s</span><span class="o">.</span><span class="n">ok</span><span class="p">()</span>
<span class="n">opts</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">ReadOptions</span><span class="p">()</span> <span class="n">opts</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">ReadOptions</span><span class="p">()</span>
<span class="n">blob</span> <span class="o">=</span> <span class="n">db</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">opts</span><span class="p">,</span> <span class="s1">&#39;key1&#39;</span><span class="p">)</span> <span class="n">blob</span> <span class="o">=</span> <span class="n">db</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">opts</span><span class="p">,</span> <span class="sa">b</span><span class="s1">&#39;key1&#39;</span><span class="p">)</span>
<span class="k">assert</span> <span class="n">blob</span><span class="o">.</span><span class="n">status</span><span class="o">.</span><span class="n">is_not_found</span><span class="p">()</span> <span class="k">assert</span> <span class="n">blob</span><span class="o">.</span><span class="n">status</span><span class="o">.</span><span class="n">is_not_found</span><span class="p">()</span>
<span class="n">blob</span> <span class="o">=</span> <span class="n">db</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">opts</span><span class="p">,</span> <span class="s1">&#39;key2&#39;</span><span class="p">)</span> <span class="n">blob</span> <span class="o">=</span> <span class="n">db</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">opts</span><span class="p">,</span> <span class="sa">b</span><span class="s1">&#39;key2&#39;</span><span class="p">)</span>
<span class="k">assert</span> <span class="n">blob</span><span class="o">.</span><span class="n">status</span><span class="o">.</span><span class="n">ok</span><span class="p">()</span> <span class="k">assert</span> <span class="n">blob</span><span class="o">.</span><span class="n">status</span><span class="o">.</span><span class="n">ok</span><span class="p">()</span>
<span class="k">assert</span> <span class="n">blob</span><span class="o">.</span><span class="n">data</span> <span class="o">==</span> <span class="s1">&#39;value2&#39;</span> <span class="k">assert</span> <span class="n">blob</span><span class="o">.</span><span class="n">data</span> <span class="o">==</span> <span class="sa">b</span><span class="s1">&#39;value2&#39;</span>
<span class="n">db</span><span class="o">.</span><span class="n">close</span><span class="p">()</span> <span class="n">db</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
</pre></div> </pre></div>
@ -66,38 +66,37 @@ apply them in a single operation</p>
<p>Iterators behave slightly different than expected. Per default they are not <p>Iterators behave slightly different than expected. Per default they are not
valid. So you have to call one of its seek methods first</p> valid. So you have to call one of its seek methods first</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">opts</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">WriteOptions</span><span class="p">()</span> <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">opts</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">WriteOptions</span><span class="p">()</span>
<span class="n">s</span> <span class="o">=</span> <span class="p">{</span><span class="s1">&#39;key1&#39;</span><span class="p">:</span> <span class="s1">&#39;value1&#39;</span><span class="p">,</span> <span class="s1">&#39;key2&#39;</span><span class="p">:</span> <span class="s1">&#39;value2&#39;</span><span class="p">,</span> <span class="s1">&#39;key3&#39;</span><span class="p">:</span> <span class="s1">&#39;value3&#39;</span><span class="p">}</span> <span class="n">s</span> <span class="o">=</span> <span class="p">{</span><span class="sa">b</span><span class="s1">&#39;key1&#39;</span><span class="p">:</span> <span class="sa">b</span><span class="s1">&#39;value1&#39;</span><span class="p">,</span> <span class="sa">b</span><span class="s1">&#39;key2&#39;</span><span class="p">:</span> <span class="sa">b</span><span class="s1">&#39;value2&#39;</span><span class="p">,</span> <span class="sa">b</span><span class="s1">&#39;key3&#39;</span><span class="p">:</span> <span class="sa">b</span><span class="s1">&#39;value3&#39;</span><span class="p">}</span>
<span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">s</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">s</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="n">db</span><span class="o">.</span><span class="n">put</span><span class="p">(</span><span class="n">opts</span><span class="p">,</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span><span class="p">)</span> <span class="n">db</span><span class="o">.</span><span class="n">put</span><span class="p">(</span><span class="n">opts</span><span class="p">,</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span><span class="p">)</span>
<span class="n">opts</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">ReadOptions</span><span class="p">()</span> <span class="n">opts</span> <span class="o">=</span> <span class="n">pyrocksdb</span><span class="o">.</span><span class="n">ReadOptions</span><span class="p">()</span>
<span class="n">it</span> <span class="o">=</span> <span class="n">db</span><span class="o">.</span><span class="n">iterator</span><span class="p">(</span><span class="n">opts</span><span class="p">)</span> <span class="n">it</span> <span class="o">=</span> <span class="n">db</span><span class="o">.</span><span class="n">iterator</span><span class="p">(</span><span class="n">opts</span><span class="p">)</span>
<span class="c1"># call this first</span>
<span class="n">it</span><span class="o">.</span><span class="n">seek_to_first</span><span class="p">()</span> <span class="n">it</span><span class="o">.</span><span class="n">seek_to_first</span><span class="p">()</span>
<span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">status</span><span class="p">()</span><span class="o">.</span><span class="n">ok</span><span class="p">()</span> <span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">status</span><span class="p">()</span><span class="o">.</span><span class="n">ok</span><span class="p">()</span>
<span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">valid</span><span class="p">()</span> <span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">valid</span><span class="p">()</span>
<span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">s</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">s</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">key</span><span class="p">()</span><span class="o">.</span><span class="n">data</span><span class="p">()</span> <span class="o">==</span> <span class="n">k</span> <span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">key</span><span class="p">()</span> <span class="o">==</span> <span class="n">k</span>
<span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">value</span><span class="p">()</span><span class="o">.</span><span class="n">data</span><span class="p">()</span> <span class="o">==</span> <span class="n">v</span> <span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">value</span><span class="p">()</span> <span class="o">==</span> <span class="n">v</span>
<span class="n">it</span><span class="o">.</span><span class="n">next</span><span class="p">()</span> <span class="n">it</span><span class="o">.</span><span class="n">next</span><span class="p">()</span>
<span class="k">assert</span> <span class="ow">not</span> <span class="n">it</span><span class="o">.</span><span class="n">valid</span><span class="p">()</span> <span class="k">assert</span> <span class="ow">not</span> <span class="n">it</span><span class="o">.</span><span class="n">valid</span><span class="p">()</span>
<span class="n">it</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="s1">&#39;key1&#39;</span><span class="p">)</span> <span class="n">it</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="sa">b</span><span class="s1">&#39;key1&#39;</span><span class="p">)</span>
<span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">valid</span><span class="p">()</span> <span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">valid</span><span class="p">()</span>
<span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">key</span><span class="p">()</span><span class="o">.</span><span class="n">data</span><span class="p">()</span> <span class="o">==</span> <span class="s1">&#39;key1&#39;</span> <span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">key</span><span class="p">()</span> <span class="o">==</span> <span class="sa">b</span><span class="s1">&#39;key1&#39;</span>
<span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">value</span><span class="p">()</span><span class="o">.</span><span class="n">data</span><span class="p">()</span> <span class="o">==</span> <span class="s1">&#39;value1&#39;</span> <span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">value</span><span class="p">()</span> <span class="o">==</span> <span class="sa">b</span><span class="s1">&#39;value1&#39;</span>
<span class="n">it</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="s1">&#39;key2&#39;</span><span class="p">)</span> <span class="n">it</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="sa">b</span><span class="s1">&#39;key2&#39;</span><span class="p">)</span>
<span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">valid</span><span class="p">()</span> <span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">valid</span><span class="p">()</span>
<span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">key</span><span class="p">()</span><span class="o">.</span><span class="n">data</span><span class="p">()</span> <span class="o">==</span> <span class="s1">&#39;key2&#39;</span> <span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">key</span><span class="p">()</span> <span class="o">==</span> <span class="sa">b</span><span class="s1">&#39;key2&#39;</span>
<span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">value</span><span class="p">()</span><span class="o">.</span><span class="n">data</span><span class="p">()</span> <span class="o">==</span> <span class="s1">&#39;value2&#39;</span> <span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">value</span><span class="p">()</span> <span class="o">==</span> <span class="sa">b</span><span class="s1">&#39;value2&#39;</span>
<span class="n">it</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="s1">&#39;key4&#39;</span><span class="p">)</span> <span class="n">it</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="sa">b</span><span class="s1">&#39;key4&#39;</span><span class="p">)</span>
<span class="k">assert</span> <span class="ow">not</span> <span class="n">it</span><span class="o">.</span><span class="n">valid</span><span class="p">()</span> <span class="k">assert</span> <span class="ow">not</span> <span class="n">it</span><span class="o">.</span><span class="n">valid</span><span class="p">()</span>
<span class="n">it</span><span class="o">.</span><span class="n">seek_for_prev</span><span class="p">(</span><span class="s1">&#39;key0&#39;</span><span class="p">)</span> <span class="n">it</span><span class="o">.</span><span class="n">seek_for_prev</span><span class="p">(</span><span class="sa">b</span><span class="s1">&#39;key0&#39;</span><span class="p">)</span>
<span class="k">assert</span> <span class="ow">not</span> <span class="n">it</span><span class="o">.</span><span class="n">valid</span><span class="p">()</span> <span class="k">assert</span> <span class="ow">not</span> <span class="n">it</span><span class="o">.</span><span class="n">valid</span><span class="p">()</span>
<span class="n">it</span><span class="o">.</span><span class="n">seek_for_prev</span><span class="p">(</span><span class="s1">&#39;key4&#39;</span><span class="p">)</span> <span class="n">it</span><span class="o">.</span><span class="n">seek_for_prev</span><span class="p">(</span><span class="sa">b</span><span class="s1">&#39;key4&#39;</span><span class="p">)</span>
<span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">valid</span><span class="p">()</span> <span class="k">assert</span> <span class="n">it</span><span class="o">.</span><span class="n">valid</span><span class="p">()</span>
</pre></div> </pre></div>
</div> </div>