Python | 熊猫系列.count()

Welcome to the guide on using count() in the Python | 熊猫系列.

Introduction

count() is a built-in method in Python that returns the number of occurrences of a specific item in a given list. In the 熊猫系列, count() is a method that is closely related to the pandas.Series class.

Syntax

The syntax of the count() method is as follows:

Series.count(level=None)

Here, Series refers to the pandas.Series object on which count() is being used. level is an optional argument that can be used to specify the level (if any) from which to count unique values.

Example Usage

Suppose we have a pandas Series object that contains the following data:

import pandas as pd

data = pd.Series([1, 2, 3, 4, 2, 2, 1, 3, 2, 2])

We can count the number of times that the integer value 2 appears in the data by calling the count() method as follows:

count = data.count(2)
print(count)

Output:

5

Conclusion

In this guide, we have explored the count() method in the Python | 熊猫系列. We have seen that this method can be used to count the number of occurrences of a specific item in a pandas Series object. The method is simple to use and can be a powerful tool when working with data in Python.