Pandas Sort By Two Columns. nsmallest (3, ['Rank']) sorts 'Rank' in ascending order and re

nsmallest (3, ['Rank']) sorts 'Rank' in ascending order and returns the lowest 3 rows. These methods are flexible and allow sorting by columns or indices. Learn efficient ways to sort data frames by multiple columns in R with our concise, example-driven tutorial. A Series is like one single column from your table – say, just the list of prices. groupby(by=None, axis=<no_default>, level=None, as_index=True, sort=True, group_keys=True, observed=<no_default>, dropna=True) [source] # Group DataFrame using a mapper or by a Series of columns. With pandas, you can do this with a single method call. Jul 10, 2025 · When sorting by multiple columns, Pandas allows us to specify a list of column names. Sort by single or multiple columns, control `ascending`/`descending` order, use `inplace`, and manage NaNs with `na Jan 25, 2024 · In pandas, the sort_values() and sort_index() methods allow you to sort DataFrame and Series. Dec 24, 2025 · Master data manipulation in Pandas with practical examples and LeetCode problems. Parameters bystr or list of str Name or list of names to sort by. I'd like to rank these songs in order of popularity, so I'd like to sort them according to the following criteria: songs that reached the highest position come first, but if there is a tie, the songs that remained in the charts for the longest come first. Nov 25, 2022 · How to order the rows of a pandas DataFrame based on multiple columns in the Python programming language. Mar 16, 2022 · Documentation for sorting a Pandas Dataframe on one column or multiple columns, using Python, Pandas, and Jupyter notebook Dec 20, 2021 · Easily Sort DataFrame in Pandas by one column, multiple columns and categories. With a few simple tweaks to the common single-column sort, we can perform sorts across multiple columns and gain new perspective on correlations in the data. Jul 15, 2025 · Sorting is a fundamental operation when working with data in Pandas. We'll show you how to sort pandas dataframes by column values, column names and index values. When we sort a Pandas DataFrame by multiple columns, the sorting is done with a priority given to the order of the columns listed. key=lambda col: f (col) argument-function of sort_values () lets you sort by a changed column but in the described case I need to sort on the basis of 2 columns. To run some examples of sorting multiple columns in Pandas DataFrame, let’s create Pandas DataFrame. In [167]: df Out[167]: count job source 0 2 sales A 1 4 sales B Feb 20, 2024 · The sort_values() method in Pandas is used to sort a DataFrame by the values of one or more columns. df. First ('pdb_info',h_index') and then ('pdb_info','dis') Jul 20, 2022 · I am trying to sort a dataframe by 2 consecutive conditions, col[0] and col[2], the input data looks like this: My desired output looks like this (sorted by col[0] and then by col[2]): The second You can use the pandas dataframe sort_values() function to sort a dataframe. Pandas provides methods like sort_values() and sort_index() to sort data. sort ¶ DataFrame. Your DataFrame will be sorted by the first column first and, when multiple rows have the same value for the first column, those rows are then sorted by their second column. sort_values (by= ['col1', 'col2'], ascending= [True, False]): Sorts by multiple columns with different ascending/descending orders. sort is unchanged, skw (s ort kw args) is just a small helper function that parses the columns and returns the usual columns= and ascending= parameters for you. I've a pandas dataframe with columns, department and employee_count. We will even discuss how to sort a subset of columns in ascending order and the remaining subset in descending order. A DataFrame is a two-dimensional labeled data structure in Pandas, resembling a table or a spreadsheet. You can pass a list of columns to [] to select columns in that order. before Sort pandas DataFrames with `sort_values()`. I have confirmed this bug exists on the main br Learn Pandas for data manipulation in Python. It's the smallest building block. Oct 14, 2020 · The pandas DataFrame. My dataset looks like: Group1 Group2 A B C A B C 1 1 0 3 2 5 Feb 24, 2024 · Sorting data within groups in Pandas can significantly enhance your data analysis, allowing for more insightful and tailored results. That‘s where pandas‘ DataFrame. Whether you need to arrange rows in ascending or descending order or reorder columns based on values, Pandas provides powerful functions to make sorting easy and efficient. Following are quick examples of sorting by multiple columns. if axis is 1 or ‘columns 1 day ago · Learn how to dynamically sort a Pandas DataFrame by a column name stored in a variable. Ascending vs descending order 3. To sort the DataFrame based on the index we need to pass axis=0 as a parameter to sort_index method. Avoiding loops: repeated . sort_values(['2', '0']), the result would be sorted by column 2 then column 0. concat(objs, *, axis=0, join='outer', ignore_index=False, keys=None, levels=None, names=None, verify_integrity=False, sort=False, copy=None) [source] # Concatenate pandas objects along a particular axis. 16. 83 Is it feasible to sort pandas dataframe by values of a column, but also by index? If you sort a pandas dataframe by values of a column, you can get the resultant dataframe sorted by the column, but unfortunately, you see the order of your dataframe's index messy within the same value of a sorted column. Aug 30, 2021 · Discover the methods to sort multiple columns in a Pandas DataFrame for better data analysis. sort(columns=None, axis=0, ascending=True, inplace=False, kind='quicksort', na_position='last', **kwargs) [source] ¶ DEPRECATED: use DataFrame. sort_values() comes in. Granted, this does not really make sense for this example because each value in df['2'] is unique. So, it would be nice if there were an opportunity to provide a key argument-function for 2 or more columns but I don't know whether such a one exists. Nov 9, 2021 · In Pandas sort_values(), the key function applies to each of the sorting columns. I have imported excel database into pandas DataFrame #Read Excel file using pandas excel_file = ' I want to group my dataframe by two columns and then sort the aggregated results within those groups. if axis is 1 or ‘columns Feb 18, 2021 · Sometimes you need to sort the dataset by indexes or columns. The primary pandas data Sampling random rows and columns 𝗦𝗼𝗿𝘁𝗶𝗻𝗴 𝗶𝗻 𝗣𝗮𝗻𝗱𝗮𝘀 1. Is there some way to use a sort function like "sort_values" but pre-define the sort order by values? Sep 29, 2020 · Better sorting Photo by Sharon McCutcheon from Pexels Sorting Pandas Dataframes Pandas dataframes can be sorted by index and values: Image by Author We can sort pandas dataframes by row values/column values. That’s why I recommend it when you need balanced subsets for evaluation, A/B test splits, or reporting. It is similar to a spreadsheet or a SQL table and can be used to perform various operations such as filtering, grouping, and sorting data. Sort DataFrame based on Index We can sort a Pandas DataFrame based on Index and column using sort_index method. import pandas from pandas Nov 29, 2024 · The sort_values () function in Pandas is a versatile tool for sorting DataFrames by specific columns, with multiple options for handling null values and choosing sorting algorithms. This field is huge — and yeah, it can feel like 3 days ago · Sorting: sorted indexes make slices and range queries faster and more predictable. Mar 1, 2025 · Sorting helps in organizing data for better analysis. Dec 27, 2023 · But bias can creep in if we only sort on a single column – we need the full, sorted picture across all metrics. It will explain the syntax and show clear examples. g NaN in current example. Mar 21, 2025 · Pandas Sort by Multiple Columns: You Won’t Believe How Easy It Is The biggest lie in data science? That it takes years to get job-ready. May 21, 2014 · I am trying to sort by two columns of this dataFrame but the approaches I have tried have not worked out. Note the actual call to . If you want to sort by two columns, pass a list of column labels to sort_values with the column labels ordered according to sort priority. Data structure also contains labeled axes (rows and columns). Lecture notes covering Series, DataFrame, data cleaning, and analysis for COMP1730/6730 Programming for Scientists. The key is to tell pandas you are dropping columns, not rows. If your column names won't sort lexicographically (e. com/sort-pand How do I sort a data frame using multiple columns such that each column is sorted in different order? For example, the primary sort key is column 'A' in ascending order and secondary sort key is column 'B' in descending order. Sep 18, 2020 · I have a data with multi-index columns in a pandas dataframe format that I would like to sort by values in multiple sub-columns. If you use df. It is explicit, readable, and works for single columns, multiple columns, and even index labels. You'll learn how to sort by one or more columns and by index in ascending or descending order. To sort a DataFrame by multiple columns in Python Pandas, you can use pandas. For this, we can use the sort_values function. You can do that by passing axis=1 or by using the columns= keyword. sort_values () method is used. pandas. Jun 17, 2013 · Suppose I have a dataframe with columns a, b and c. g. 03:32 If you want to sort some columns in ascending order and some columns in descending order, then you can pass a list of Booleans to ascending. First, Let's Create a Dataframe: df. Parameter ascending can take a list of values: ascending=[True, False]. One common task when working with data frames is sorting the data based on one or more columns. I have this: A B C 1 4 string1 2 11 string2 1 13 string3 2 43 string4 And, I want to sort by both A and B at once, to get this: A B C 1 4 string1 1 1 Jan 11, 2022 · 2 This question already has answers here: How to sort a pandas dataFrame by two or more columns? (5 answers) Jul 5, 2022 · In today’s tutorial we will explain in detail how to sort pandas DataFrames either in ascending or descending order. sort_values ¶ DataFrame. 1), you'll need to sort differently, but that has nothing to do with pandas. For this, Dataframe. Apr 15, 2017 · I have a pandas DataFrame that I need to sort in a particular order in one column, and just ascending in another. Can anyone help. It is highly flexible, allowing for both ascending and descending, as well as sorting by multiple columns. Both columns have repeated values. Sorting by single and multiple columns 2. sort_values (by='column_name'): Sorts the DataFrame by a column. Any help is appreciated. sort_values() Sort DataFrame either by labels (along either axis) or by the values in column (s) Aug 30, 2018 · I'm doing some analysis on customers behaviors upon using internet banking versus offline channel. Can also add a layer of hierarchical indexing on the concatenation axis, which may be useful if the labels are the same 4 days ago · Inside Pandas, there are two main stars: Series and DataFrame. This is probably a really basic answer. It consists of rows and columns, where each column can hold different data types. Whether it’s a straightforward sort by one or two columns, or more complex operations involving custom orders and the key parameter, Pandas offers flexible ways to order your data. Feb 18, 2019 · 2 I've been struggling to sort the entire columns of my df, however, my code seems to be working for solely the first column ('Name') and shuffles the rest of the columns based upon the first column as shown here: To sort a DataFrame by a column in Python pandas, you can use pandas. In this article, we will explore how to sort a Pandas data frame with multiple columns in Python 3. if axis is 0 or ‘index’ then by may contain index levels and/or column labels. I need to sort the employee_count column in descending order. Parameters: bystr or list of str Name or list of names to sort by. DataFrame. columns), axis=1) This assumes that sorting the column names will give the order you want. By mastering the examples provided, ranging from basic to advanced techniques, you’ll be better equipped to harness the full potential of your data. Let's see this in action with a simple example from daily life. It allows sorting in both ascending and descending order while handling missing values efficiently. Jul 21, 2022 · This guide will show you everything you need to know about sorting Pandas DataFrames. As of Pandas 0. groupby # DataFrame. DataFrame(data=None, index=None, columns=None, dtype=None, copy=None) [source] # Two-dimensional, size-mutable, potentially heterogeneous tabular data. Sep 25, 2023 · Here, we are going to learn how to sort a dataFrame in python pandas by two or more columns? Aug 4, 2022 · Sorting by Multiple Columns A list of column names can be provided to sort by multiple columns. sort_values # DataFrame. Sep 5, 2025 · For more Practice: Solve these Related Problems: Write a Pandas program to sort a DataFrame by two or more columns with different sort orders and then output the sorted DataFrame. How to Sort Pandas DataFrame From One Column Feb 20, 2024 · Sorting DataFrame rows by multiple columns in Pandas is a versatile and powerful operation that provides deep insights into your data. sort_values() function accepts a key for sorting like the sort () function, but the key function should be vectorized (per the pandas documentation). We used several running examples of pandas dataframe. drop. sort_values('mpg') Order rows by values of a column (low to high). It looks more or less like this: import pandas May 20, 2021 · Understanding the DataFrame Before diving into sorting, let’s briefly understand what a DataFrame is. I prefer columns= in production code because it is harder to pandas. Aug 4, 2024 · Pandas is a powerful data manipulation library in Python that provides various functions and methods to work with structured data. Using sort_values () sort_values () method is the most flexible and widely used method for sorting a DataFrame by multiple columns. Additionally, we will also demonstrate how to involve one or more columns when it comes to sorting the data. Oct 31, 2022 · How to sort pandas DataFrame by two columns collectively, rather than one then the other? Asked 2 years, 6 months ago Modified 2 years, 6 months ago Viewed 323 times Example: Ordering pandas DataFrame Based On Multiple Columns Using sort_values () Function In this example, I’ll show how to sort the rows of a pandas DataFrame by two or more columns. Sorting by Multiple Columns This example shows how to sort a DataFrame by multiple columns. To sort by multiple columns in Pandas, you can pass the desired columns as a list to the by parameter in the sort_values() method. concat # pandas. Apr 2, 2022 · I am going to show you how to sort regular campaign data from a pizza business and we are going to do it with both a single column sort and then a multiple column sort by date and customer number. How To Change Column Name In Pandas Dataframe Sort By - Free printable templates for every occasion! Instantly download and customize designs for planners, invitations, worksheets, and more. Multiple columns can also be set in this manner: Jul 23, 2025 · Here, df. 0, you can also use assign, which assigns new columns to a DataFrame and returns a new object (a copy) with all the original columns in addition to the new ones. Call the sort_values () method on the DataFrame object, and pass the required column as string to the by named parameter. Dec 17, 2020 · Python Pandas: sort a dataframe by multiple columns but different sorting order Asked 5 years ago Modified 5 years ago Viewed 2k times Dec 2, 2025 · The following example outlines the standard syntax used to sort a Pandas DataFrame by multiple columns: Dec 1, 2023 · Sorting data is an essential task in data analysis, and Pandas provides a powerful method called sort_values () to sort DataFrames based on one or more columns. our focus on this exercise will be on You might be wondering if it’s possible to sort using multiple columns and to have those columns use different ascending arguments. In this tutorial, you'll learn how to sort data in a pandas DataFrame using the pandas sort functions sort_values() and sort_index(). This method sorts the data frame in Ascending or Descending order according to the columns passed inside the function. How do I do this? pandas. sort_values(by, axis=0, ascending=True, inplace=False, kind='quicksort', na_position='last', ignore_index=False, key=None) [source] ¶ Sort by the values along either axis. sort_values(by, *, axis=0, ascending=True, inplace=False, kind='quicksort', na_position='last', ignore_index=False, key=None) [source] # Sort by the values along either axis. A groupby operation involves some combination of splitting the object, applying a function, and combining the results. This can be used to group large amounts of 6 days ago · When I remove columns, I default to DataFrame. But if there is a tie between 2 employee_counts then they should be Jun 19, 2023 · What is a Pandas DataFrame? A Pandas DataFrame is a two-dimensional table-like data structure that is used to store and manipulate data in Python. _libs. Apr 11, 2018 · I want to sort the values in column C in ascending order and values in column B in order "April","August","December" and any remaining values e. You can sort in ascending or descending order, or sort by multiple columns. Apr 2, 2023 · We can use Pandas method sort_values() to sort by multiple columns in different order: ascending and descending. reindex(sorted(df. Yields below output. tslibs. Likewise, we can also sort by row index/column index. How to sort a dataframe in python pandas by ascending order and by descending order on multiple columns with an example for each . Aug 25, 2021 · How can I sort a Pandas DataFrame according to multiple columns, with some of the columns being sorted in ascending order while other columns are sorted in descending order? Furthermore, assume tha Pandas sort by two column values Asked 5 years, 1 month ago Modified 5 years, 1 month ago Viewed 94 times Sep 7, 2020 · Lean how to sort data in a Pandas dataframe, including how to sort in ascending or descending order, as well as sorting by multiple columns. Pandas version checks I have checked that this issue has not already been reported. if axis is 1 or ‘columns Jul 29, 2019 · Custom sort on two columns simultaneously Pandas Asked 5 years, 7 months ago Modified 5 years, 7 months ago Viewed 2k times Nov 29, 2022 · 0 This question already has answers here: How to sort a DataFrame by two columns, using a custom order? (1 answer) Sorting multiple columns based on list in Pandas (2 answers) 668 df = df. Learn sorting, transforming, and reshaping data using Python. Jul 23, 2025 · In this article, we will discuss how to sort a Pandas dataframe by both index and columns. This is useful when we want to sort by one column like age and if there are ties, sort by another column like salary. In this topic, we have learned to sort an existing Pandas DataFrame by two or more columns. Apr 7, 2022 · 1 3 I need to sort by COL1 + COL2. 3 to appear after Q9. Arithmetic operations align on both row and column labels. May 16, 2025 · Here's how to use Pandas to sort DataFrames by column, index, multiple columns, and what to know about sorting algorithms, handling NaNs and applying key functions in Pandas. . In this post, I’ll cover how to do sorting and ranking in Pandas and demonstrate an application with a real world dataset. I have confirmed this bug exists on the latest version of pandas. DataFrame # class pandas. From basic sorting operations to complex, multi-level sorting with custom logic, the techniques covered in this guide provide a comprehensive framework for organizing and analyzing data effectively. Can be thought of as a dict-like container for Series objects. Timestamp'> Step 3: Sorting the DataFrame as per date We will be using the sort_values () method to sort our dataset and the attribute that we will pass inside the function is the column name using which we want to sort our DataFrame. In pandas, stratified sampling is straightforward with groupby and sample. if axis is 1 or ‘columns Nov 29, 2021 · This tutorial explains how to sort by multiple columns in a pandas DataFrame, including several examples. sort_values () method. loc in a Python loop is almost always a sign you should vectorize or group. I want to sort the dataframe by column b in ascending order, and by column c in descending order. A DataFrame is a bunch of Series put together side by side, making a full table with rows and columns. Write a Pandas program to sort a DataFrame by multiple columns and then reset the index while maintaining the sorted order. Start printing today! Jul 15, 2025 · In this article, our basic task is to sort the data frame based on two or more columns. Dec 9, 2021 · Output: <class 'str'> <class 'pandas. I would like to sort column A in this order: July, August, Sept. Let’s take a look at how to sort the DataFrame by “ year ”, “ promotion_time ” and “ cost ”. , if you want column Q10. More details: https://statisticsglobe. This guide explains the correct use of sort_values for programmatic sorting. Bot Verification Verifying that you are not a robot Feb 8, 2020 · Does this answer your question? How to sort a dataFrame in python pandas by two or more columns? Jun 10, 2025 · Mastering the art of sorting Pandas DataFrames by multiple columns is an indispensable skill in the data scientist's toolkit. Jan 13, 2020 · This tutorial will explain how to use the Pandas sort_value method to sort the columns of a DataFrame. If a column is not contained in the DataFrame, an exception will be raised. It allows the flexibility to sort a dataframe by one or more columns. I have a dataset with multi-index columns in a pandas df that I would like to sort by values in a specific column. Allows optional set logic along the other axes. timestamps. Call the sort_values () method on the DataFrame object, and pass the required columns as a list of strings to the by named argument.

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