Count items using collections.Counter. Learn the syntax using an editable python example.
When to use it
Use this technique in collections, record processing and reusable transformations. Check the input types, any required imports, and whether the operation changes existing values or produces a new result.
Syntax
print(Counter('banana')['a'])Parameters
Inspect the literals, variables and function arguments used in the example. Replace values with compatible python types before testing.
Returns / effect
Expected demonstration result: 3.
Expected output
3
Common mistake and fix
Avoid assuming collection order or mutation semantics without checking the language API.
Good practices
Keep the example small, check its documented output, then adapt it to your own project with validation and error handling.
Practice exercise
Change the input word so the number of letter a characters printed is 2.
Compatibility: Confirm support in your installed language/runtime version; some examples need modern standard libraries.
Related concepts: collections, examples, syntax
Explain this code
Try a small exercise
Change the input word so the number of letter a characters printed is 2.
Show a hint
Try the word panda.
Runs your edited code and compares its output with this exercise test.
Show example solution
from collections import Counter
print(Counter('panda')['a'])Open permanent reference page ↗
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