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    <p>(I'm aware this isn't exactly what you're asking for, but) If you're happy with the auto-completion/suggestions appearing on <kbd>TAB</kbd> (as used in many shells), then you can quickly get up and running using the <a href="http://docs.python.org/library/readline.html" rel="noreferrer">readline</a> module.</p> <p>Here's a quick example based on <a href="https://doughellmann.com/blog/2008/11/30/pymotw-readline/" rel="noreferrer">Doug Hellmann's PyMOTW writeup on readline</a>.</p> <pre><code>import readline class MyCompleter(object): # Custom completer def __init__(self, options): self.options = sorted(options) def complete(self, text, state): if state == 0: # on first trigger, build possible matches if text: # cache matches (entries that start with entered text) self.matches = [s for s in self.options if s and s.startswith(text)] else: # no text entered, all matches possible self.matches = self.options[:] # return match indexed by state try: return self.matches[state] except IndexError: return None completer = MyCompleter(["hello", "hi", "how are you", "goodbye", "great"]) readline.set_completer(completer.complete) readline.parse_and_bind('tab: complete') input = raw_input("Input: ") print "You entered", input </code></pre> <p>This results in the following behaviour (<code>&lt;TAB&gt;</code> representing a the tab key being pressed):</p> <pre><code>Input: &lt;TAB&gt;&lt;TAB&gt; goodbye great hello hi how are you Input: h&lt;TAB&gt;&lt;TAB&gt; hello hi how are you Input: ho&lt;TAB&gt;ow are you </code></pre> <p>In the last line (<kbd>H</kbd><kbd>O</kbd><kbd>TAB</kbd> entered), there is only one possible match and the whole sentence "how are you" is auto completed.</p> <p>Check out the linked articles for more information on <code>readline</code>.</p> <hr> <blockquote> <p>"And better yet would be if it would complete words not only from the beginning ... completion from arbitrary part of the string."</p> </blockquote> <p>This can be achieved by simply modifying the match criteria in the completer function, ie. from:</p> <pre><code>self.matches = [s for s in self.options if s and s.startswith(text)] </code></pre> <p>to something like:</p> <pre><code>self.matches = [s for s in self.options if text in s] </code></pre> <p>This will give you the following behaviour:</p> <pre><code>Input: &lt;TAB&gt;&lt;TAB&gt; goodbye great hello hi how are you Input: o&lt;TAB&gt;&lt;TAB&gt; goodbye hello how are you </code></pre> <hr> <h3>Updates: using the history buffer (as mentioned in comments)</h3> <p>A simple way to create a pseudo-menu for scrolling/searching is to load the keywords into the history buffer. You will then be able to scroll through the entries using the up/down arrow keys as well as use <kbd>Ctrl</kbd>+<kbd>R</kbd> to perform a reverse-search.</p> <p>To try this out, make the following changes:</p> <pre><code>keywords = ["hello", "hi", "how are you", "goodbye", "great"] completer = MyCompleter(keywords) readline.set_completer(completer.complete) readline.parse_and_bind('tab: complete') for kw in keywords: readline.add_history(kw) input = raw_input("Input: ") print "You entered", input </code></pre> <p>When you run the script, try typing <kbd>Ctrl</kbd>+<kbd>r</kbd> followed by <kbd>a</kbd>. That will return the first match that contains "a". Enter <kbd>Ctrl</kbd>+<kbd>r</kbd> again for the next match. To select an entry, press <kbd>ENTER</kbd>.</p> <p>Also try using the UP/DOWN keys to scroll through the keywords.</p>
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    1. COThank you, I tested the code. It only has missing some features I'd like to have. `automatic autocomplation while typing, without the need to press tab key` possibility to complete from `arbitrary part of the strings`, possibility of `choosing between matches with rows, or other keyboard shortcuts`.
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    2. COSorry I missed that arbitrary part of string works too.
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    3. COI forgot that this feature is in google, so it's possible to try search something with google.
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