擅长:python、mysql、java
<blockquote>
<p>Dictionary is collection of Key - Value pairs. For example:</p>
</blockquote>
<pre><code>Let's create a dictionary with city - state pairs.
cities = {"New York City":"NY", "San Jose":"CA"}
In this dict, we have Key's as City and Values as their respective states. To iterate over this dict you can write a for loop like this:
for city, states in cities.items():
print(city, states)
> "New York", "NY"
"San Jose", "CA"
For your example:
for key, value in worldCities.items():
if key == "something":
"then do something"
else:
"do something else"
</code></pre>