Series = pd.Series(my_list, index=labels) To be clear, once labels have been applied to a pandas Series, you can use either its numerical index or its label. Why would you want to use labels in a pandas Series? The main advantage is that it allows you to reference an element of the Series using its label instead of its numerical index. #Remember - we created the 'labels' list earlier in this section We can add labels to a pandas Series using the index argument like this: As you might have guessed, that first column is a column of labels. One of the key advantages of using pandas Series over NumPy arrays is that they allow for labeling. The second column is the data from my_list. The output shown above is clearly designed to present as two columns. If you run this in your Jupyter Notebook, you will notice that the output is quite different than it is for a normal Python list: We do this with the my_list variable below: The easiest way to create a pandas Series is by passing a vanilla Python list into the pd.Series() method. We will explore all of them in this section.įirst, let’s create a few starter variables - specifically, we’ll create two lists, a NumPy array, and a dictionary. There are a number of different ways to create a pandas Series. To work with pandas Series, you’ll need to import both NumPy and pandas, as follows:įor the rest of this section, I will assume that both of those imports have been executed before running any code blocks. The Imports You’ll Require To Work With Pandas Series Pandas Series are similar to NumPy arrays, except that we can give them a named or datetime index instead of just a numerical index. Series are a special type of data structure available in the pandas Python library. In this section, we’ll be exploring pandas Series, which are a core component of the pandas library for Python programming. How To Save Pandas DataFrames as Excel Files for External Users.How To Concatenate DataFrames in Pandas.How To Deal With Missing Data in Pandas.Over the next several sections, we will cover the following information about the pandas library: What We Will Learn About PandasĪs we mentioned earlier in this course, advanced Python practitioners will spend much more time working with pandas than they spend working with NumPy. Just as the NumPy library had a built-in data structure called an array with special attributes and methods, the pandas library has a built-in two-dimensional data structure called a DataFrame. Pandas was designed to work with two-dimensional data (similar to Excel spreadsheets). If you are curious about this, visit the pandas source code repository on GitHub The Main Benefit of Pandas Pandas is an open source library, which means that anyone can view its source code and make suggestions using pull requests. Note that pandas is typically stylized as an all-lowercase word, although it is considered a best practice to capitalize its first letter at the beginning of sentences. Pandas is a Python library created by Wes McKinney, who built pandas to help work with datasets in Python for his work in finance at his place of employment.Īccording to the library’s website, pandas is “a fast, powerful, flexible and easy to use open source data analysis and manipulation tool, built on top of the Python programming language.” Much of the rest of this course will be dedicated to learning about pandas and how it is used in the world of finance. Pandas is a widely-used Python library built on top of NumPy.
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