Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>To check if <code>o</code> is an instance of <code>str</code> or any subclass of <code>str</code>, use <a href="https://docs.python.org/3/library/functions.html#isinstance" rel="noreferrer">isinstance</a> (this would be the "canonical" way):</p> <pre><code>if isinstance(o, str): </code></pre> <p>To check if the type of <code>o</code> is exactly <code>str</code>:</p> <pre><code>if type(o) is str: </code></pre> <p>The following also works, and can be useful in some cases:</p> <pre><code>if issubclass(type(o), str): </code></pre> <p>See <a href="http://docs.python.org/2/library/functions.html" rel="noreferrer">Built-in Functions</a> in the Python Library Reference for relevant information.</p> <p>One more note: in this case, if you're using python 2, you may actually want to use:</p> <pre><code>if isinstance(o, basestring): </code></pre> <p>because this will also catch Unicode strings (<a href="https://docs.python.org/2/library/functions.html#unicode" rel="noreferrer"><code>unicode</code></a> is not a subclass of <code>str</code>; both <code>str</code> and <code>unicode</code> are subclasses of <a href="https://docs.python.org/2/library/functions.html#basestring" rel="noreferrer"><code>basestring</code></a>). Note that <code>basestring</code> no longer exists in python 3, where there's <a href="https://docs.python.org/3.0/whatsnew/3.0.html#text-vs-data-instead-of-unicode-vs-8-bit" rel="noreferrer">a strict separation</a> of strings (<a href="https://docs.python.org/3/library/functions.html#func-str" rel="noreferrer"><code>str</code></a>) and binary data (<a href="https://docs.python.org/3/library/functions.html#func-bytes" rel="noreferrer"><code>bytes</code></a>).</p> <p>Alternatively, <code>isinstance</code> accepts a tuple of classes. This will return True if x is an instance of any subclass of any of (str, unicode):</p> <pre><code>if isinstance(o, (str, unicode)): </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POWhat's the canonical way to check for type in Python?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USuser2357112
    1. USFredrik Johansson
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POWhat's the canonical way to check for type in Python?
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COstr.__subclasses__() only returns the direct subclasses of str, and does not do the same thing as issubclass() or isinstance(). (To do that, you would have to recursively call .__subclasses__().
      singulars
      1. PO
      1. USThomas Wouters
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload