Best Python Data Analysis Books to Buy in October 2025
Python for Data Analysis: Data Wrangling with pandas, NumPy, and Jupyter
Python Data Analysis: Perform data collection, data processing, wrangling, visualization, and model building using Python, 3rd Edition
Python for Data Analysis: Data Wrangling with Pandas, NumPy, and IPython
Murach's Python for Data Analysis (Training & Reference)
Pandas for Everyone: Python Data Analysis (Addison-Wesley Data & Analytics Series)
Python Crash Course, 3rd Edition: A Hands-On, Project-Based Introduction to Programming
Python for Excel: A Modern Environment for Automation and Data Analysis
To sort each row data using pandas, you can use the sort_values method along the axis parameter axis=1. This will sort the values of each row in ascending or descending order. Additionally, you can specify the ascending=False argument to sort in descending order. For example, you can sort a DataFrame named df by each row using the following code:
df.sort_values(by=df.columns.tolist(), axis=1, ascending=True)
How to sort rows with null values in pandas?
To sort rows with null values in pandas, you can use the sort_values() function with the na_position parameter set to 'first':
import pandas as pd
Create a sample DataFrame with null values
data = {'A': [1, 2, None, 4, 5], 'B': [None, 2, 3, 4, 5]} df = pd.DataFrame(data)
Sort the DataFrame by column A with null values first
df_sorted = df.sort_values(by='A', na_position='first')
print(df_sorted)
This will sort the DataFrame by the values in column 'A' with null values placed at the beginning of the sorted DataFrame.
What is the purpose of ascending and descending sorting options in pandas?
The purpose of ascending and descending sorting options in Pandas is to allow users to arrange data in a specific order based on their preferences.
Ascending sorting option arranges data in increasing order, from smallest to largest, while descending sorting option arranges data in decreasing order, from largest to smallest.
This allows users to easily view and analyze the data in a more organized and readable manner, making it easier to identify patterns, outliers, or trends within the dataset. It is a helpful feature for data manipulation and analysis tasks in Pandas.
What is the outcome of sorting rows in pandas?
The outcome of sorting rows in pandas is that the rows of the DataFrame are rearranged based on the values in one or more columns. By default, rows are sorted in ascending order, but you can also specify to sort in descending order. Sorting rows can help to organize and analyze the data in a more meaningful way.
How to sort rows in pandas based on text values?
To sort rows in a pandas DataFrame based on text values in a specific column, you can use the sort_values() method. Here's how you can do it:
import pandas as pd
Create a sample DataFrame
data = {'col1': ['apple', 'banana', 'orange', 'kiwi'], 'col2': [1, 2, 3, 4], 'col3': [10, 20, 30, 40]}
df = pd.DataFrame(data)
Sort the DataFrame based on the values in 'col1'
df_sorted = df.sort_values(by='col1')
print(df_sorted)
This will sort the rows in the DataFrame based on the values in the 'col1' column in alphabetical order. You can also specify the ascending=False argument inside the sort_values() method to sort in reverse alphabetical order.
How to sort rows in pandas based on categorical data?
To sort rows in a pandas DataFrame based on categorical data, you can use the sort_values() function and specify the column containing the categorical data as the sorting key. Here's an example:
import pandas as pd
Create a sample DataFrame
data = {'Category': ['A', 'B', 'B', 'A', 'C', 'C'], 'Value': [10, 20, 15, 30, 25, 5]}
df = pd.DataFrame(data)
Sort the DataFrame based on the 'Category' column
sorted_df = df.sort_values(by='Category')
print(sorted_df)
This will sort the rows in the DataFrame based on the 'Category' column in alphabetical order. If you want to sort in a specific order, you can specify the order parameter in the sort_values() function:
sorted_df = df.sort_values(by='Category', key=lambda x: x.map({'A': 0, 'B': 1, 'C': 2}))
print(sorted_df)
This will sort the rows in the DataFrame based on the 'Category' column in the order specified by the dictionary mapping.
What is the difference between ascending and descending sorting?
Ascending sorting arranges elements in a list in increasing order, from smallest to largest. Descending sorting, on the other hand, arranges elements in decreasing order, from largest to smallest.