Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>Nope, it is not possible to overload the unary ++ operator, because it is not an operator at all in Python.</p> <p>Only (a subset of) the operators that are allowed by the Python syntax (those operators that already have one or more uses in the language) may be overloaded.</p> <p><a href="http://docs.python.org/reference/lexical_analysis.html#operators" rel="nofollow noreferrer">These</a> are valid Python operators, and <a href="http://docs.python.org/library/operator.html" rel="nofollow noreferrer">this page</a> lists the methods that you can define to overload them (the ones with two leading and trailing underscores).</p> <p>Instead of i++ as commonly used in other languages, in Python one writes i += 1.</p> <p>In python the + sign needs an operand to its right. It <em>may</em> also have an operand to its left, in which case it will be interpreted as a binary instead of a unary operator. +5, ++5, ..., ++++++5 are all valid Python expressions (all evaluating to 5), as are 7 + 5, 7 ++ 5, ..., 7 ++++++++ 5 (all evaluating to 7 + (+...+5) = 12). 5+ is <em>not</em> valid Python. See also <a href="https://stackoverflow.com/questions/470139/why-does-12-3-in-python">this question</a>.</p> <p><strong>Alternative idea</strong>: Depending on what you actually wanted to use the ++ operator for, you may want to consider overloading the <a href="http://docs.python.org/reference/datamodel.html#object.__pos__" rel="nofollow noreferrer">unary (prefix) plus operator</a>. Note, thought, that this may lead to some odd looking code. Other people looking at your code would probably assume it's a no-op and be confused.</p>
    singulars
    1. This table or related slice is empty.
    1. POIs it possible to overload ++ operators in Python?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USCommunity
    1. USStephan202
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    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. This table or related slice is empty.
 

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