mirror of
https://github.com/github/codeql.git
synced 2026-01-04 02:00:18 +01:00
29 lines
908 B
XML
29 lines
908 B
XML
<!DOCTYPE qhelp PUBLIC
|
|
"-//Semmle//qhelp//EN"
|
|
"qhelp.dtd">
|
|
<qhelp>
|
|
<overview>
|
|
<p>Dictionary literals are constructed in the order given in the source.
|
|
This means that if a key is duplicated the second key-value pair will overwrite
|
|
the first as a dictionary can only have one value per key.
|
|
</p>
|
|
|
|
</overview>
|
|
<recommendation>
|
|
<p>Check for typos to ensure that the keys are supposed to be the same.
|
|
If they are then decide which value is wanted and delete the other one.</p>
|
|
|
|
</recommendation>
|
|
<example>
|
|
<p>This example will output "c" because the mapping between 2 and "b" is overwritten by the
|
|
mapping from 2 to "c". The programmer may have meant to map 3 to "c" instead.</p>
|
|
<sample src="DuplicateKeyInDictionaryLiteral.py" />
|
|
|
|
</example>
|
|
<references>
|
|
|
|
<li>Python: <a href="http://docs.python.org/2/reference/expressions.html#dictionary-displays">Dictionary literals</a>.</li>
|
|
|
|
</references>
|
|
</qhelp>
|