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Pandas explode multiple columns. ) My only suggestion would be to perhaps make the docstring clearer. 25) Jun 3, 2023 · Lines 8803 to 8804 in 965ceca * If specified columns to explode have not matching count of elements rowwise in the frame. explode Explode a DataFrame from list-like columns to long format. Jan 1, 2021 · Pandas DataFrame中展开（explode）多个list列的高效方法 在本文中，我们将介绍如何使用Pandas DataFrame中的函数explode ()展开（或解压缩）多个list列。 这个问题经常出现在数据分析的实践中，这里我们将详细讨论如何高效解决这个问题。 May 30, 2025 · In Pandas, the . Jan 17, 2021 · Is your feature request related to a problem? I have often looked for the option to use the explode function on multiple columns at the same time. read_excel() function. DataFrame. Dec 25, 2021 · What version of pandas are you using? You need to update, because passing a list of columns to explode was added recently. explode(ignore_index=False) [source] # Transform each element of a list-like to a row. For example Nov 6, 2024 · How to Unnest and Explode a Column in a Pandas DataFrame into Multiple Rows Dealing with DataFrames in pandas often involves handling columns that contain lists or other complex objects. DataFrame({'Name': ['Name1',' Feb 20, 2024 · The explode() method in Pandas’ DataFrame is designed to transform each element of a list-like to a row, replicating index values. explode() otherwise the size of the dataframe becomes unmanageable (. explode ¶ DataFrame. Does it have to go thru a for pandas expand dataframe column with tuples, into multiple columns and rows Ask Question Asked 5 years, 9 months ago Modified 5 years, 9 months ago Jul 3, 2024 · Pandas Multiple Columns explode [duplicate] Asked 1 year, 7 months ago Modified 1 year, 7 months ago Viewed 95 times Mar 10, 2021 · 文章浏览阅读1. Here's the sample data - json response Jun 22, 2022 · Here I am exploding multiple columns, Can I get this done in single command, where it can do this exploding for all columns without specifying? OR should it run through a loop for all columns which has ',' in it? This will generate duplicate rows (both on your and my solution), that need to be dropped intermediately after each . Method 0: Using pandas. , space, comma). For multiple columns, specify a non-empty list with each element be str or tuple, and all specified columns their list-like data on same row of the frame must have matching length Nov 9, 2018 · How to unnest (explode) a column in a pandas DataFrame, into multiple rows Asked 7 years, 4 months ago Modified 5 months ago Viewed 163k times Dec 24, 2024 · The explode () function in the Python Pandas library is a highly effective tool for transforming each iterable or list-like element in a DataFrame into separate rows. Jul 30, 2020 · The countries column is a JSON with multiple rows of data, the year applies to all that data, so how can I convert it to a dataframe with all the rows and the corresponding year in each row? Jul 23, 2025 · This guide explores multiple techniques to achieve this, catering to different scenarios and offering insights into performance. e. Key Points – Nov 22, 2024 · How to read excel multiple sheets in pandas? To read multiple sheets from an Excel file using Pandas, you can use the pd. Jun 21, 2023 · Explotar varias columnas en Pandas Olorunfemi Akinlua 21 junio 2023 Pandas Pandas Column Use la función explotar () para explotar varias columnas en Pandas Use Series. The dataframe has several columns where each can have a single value or a list. Dec 29, 2023 · We’ve got this column packed with information, neatly tucked away in an array-like structure. Learn how to efficiently handle multiple list columns of different lengths in a Pandas DataFrame using the explode method. In this comprehensive guide, you’ll learn how to use Pandas explode() to effortlessly transform your data from “wide” to “long” format for effective analysis. I'm looking for an efficient solution to using pandas explode but for multiple columns containing lists but that have varying element lengths. However, apply() is known to be slow, it iteratively applies your function to each row/column as necessary and consumes a lot more memory. In one row, several columns can have lists but it is guaranteed that all the lists in that row are the same length. split() and explode() functions. In this post, we discussed how to transform the shape of a DataFrame by using pandas. explode() method, covering single and multiple columns, handling nested data, and common pitfalls with practical Python code examples. Dec 17, 2019 · Pandas Explode on Multiple columns Ask Question Asked 6 years, 2 months ago Modified 3 years, 4 months ago Nov 9, 2018 · How to unnest (explode) a column in a pandas DataFrame, into multiple rows Asked 7 years, 4 months ago Modified 5 months ago Viewed 163k times 我们将使用 Pandas 中的方法将这些列表列中的值展开，每个值作为一个新行。 方法1：使用 . When you read multiple sheets, it creates a Dict of DataFrame, each key in Dictionary is represented as Sheet Jul 7, 2025 · There are multiple ways to add a new empty/blank column (single or multiple columns) to a pandas DataFrame by using assign operator, assign(), insert() and apply() methods. How do I make it work on multiple columns? I'm using Pandas 1. Oct 7, 2020 · How to implode (reverse of pandas explode) based on a column Ask Question Asked 5 years, 5 months ago Modified 3 years, 4 months ago May 31, 2022 · I believe its because python struggles to explode multiple columns in this manner. explode(self, column: Union [str, Tuple]) → 'DataFrame' [source] ¶ Transform each element of a list-like to a row, replicating the index values. read_excel() is used to read multiple sheets from excel. Feb 2, 2024 · We can use the explode() function with the Pandas library, which will be explained in this topic. explode para explotar múltiples columnas en Pandas Los datos a los que tenemos acceso pueden contener diferentes tipos de datos, desde cadenas hasta matrices o listas. 8 Column (s) to explode. 25) See also DataFrame. 0. Still it was very informative to discover this new pandas function (wide_to_long). Q3: How Do I Handle NaN Values While Exploding? Jun 19, 2023 · Pandas provides a simple and efficient way to split text in a column into multiple rows using the str. Example: May 14, 2023 · Is there a way to split and explode on multiple columns? This maybe a basic task but I am drawing a blank currently, My pandas dataframe: Name Title City Country Source Haliey Wells Data Scientist; Jun 19, 2023 · In this blog, we'll discuss various techniques for breaking down a column in a Pandas DataFrame into multiple columns, a task often encountered in data science and software engineering, particularly when working with unstructured or messy data. Nov 9, 2023 · Columns containing lists, dictionaries, or pipe-separated values? The explode() function is the perfect tool for pivoting and normalizing this kind of messy real-world data. Jul 23, 2025 · This guide explores multiple techniques to achieve this, catering to different scenarios and offering insights into performance. Perfect for data analysi Sep 29, 2021 · 5 If you have a Pandas version prior to 1. Parameters: columnIndexLabel Column (s) to explode. Sep 9, 2015 · 17 I think this a really good question, in Hive you would use EXPLODE, I think there is a case to be made that Pandas should include this functionality by default. g. Oct 2, 2012 · I have a pandas dataframe in which one column of text strings contains comma-separated values. We can do this by passing a list of column names to the explode method. Thus, you are able to use this: Jul 26, 2025 · In such cases, there is a necessity to split that column into various columns, as Pandas cannot handle such data. We hope this article has been helpful in your data preprocessing journey. Step-by-step guide with examples, handling empty lists, reset index, and related tips. DataFrame. Using drop_duplicates() after each explode() ensures the dataframe maintains a healthy size. The only argument we passed to the index is the column to explode. Feb 17, 2023 · I have a dataframe with some columns that are lists. explode(['X']) ValueError: column must be a scalar Hi anyone could advice on this? pandas. Jan 1, 2021 · Pandas DataFrame中展开（explode）多个list列的高效方法 在本文中，我们将介绍如何使用Pandas DataFrame中的函数explode ()展开（或解压缩）多个list列。 这个问题经常出现在数据分析的实践中，这里我们将详细讨论如何高效解决这个问题。 Jun 21, 2023 · Verwenden Sie die explode() -Funktion, um mehrere Säulen in Pandas zum Explodieren zu bringen Verwenden Sie Series. Explore the methods to efficiently manage and extract valuable information from your data. We showed how to use it with one or multiple columns as well as how to workaround some limitations with the multiple columns scenario. 3 In more recent versions, pandas allows you to explode multiple columns at once using DataFrame. explode to the price and weight columns to the the expected output. Added in version 1. Feb 14, 2024 · Learn all you need to know about the pandas . Dec 9, 2018 · Learn how to split a column into multiple rows so that the data is normalized and each cell contains only one value using Pandas DataFrame. Series. May 25, 2021 · Pandas - Explode multiple columns in pandas and assign value based on the exploded column Ask Question Asked 4 years, 9 months ago Modified 4 years, 9 months ago Mar 29, 2023 · Pandas apply() is a convenient function that can do many different transformations, including unnest list-like columns. Data structure also contains labeled axes (rows and columns). In most cases, all these values are considered empty/missing. explode # DataFrame. vstack` and `reshape`. 0: Multi-column explode ignore_indexbool, default False May 8, 2018 · Here is main problem numpy cast all dtypes to same, so more general solution is repeat index and if same dtypes of all column is possible use cᴏʟᴅsᴘᴇᴇᴅ solution too. explode, um mehrere Säulen in Pandas explodieren zu lassen Die Daten, auf die wir Zugriff haben, können verschiedene Datentypen enthalten, von Strings bis hin zu Arrays oder Listen. You can use this code to get the results I believe you are expecting Mar 22, 2021 · How to explode columns with multiple (dictionary like) json objects in each row in pandas? Asked 4 years, 8 months ago Modified 4 years, 7 months ago Viewed 931 times Apr 11, 2024 · The DataFrame. Q3: How Do I Handle NaN Values While Exploding? If you wanted to split a column of delimited strings rather than lists, you could similarly do: df["teams"]. json_normalize If the index isn't integers (as in the example), first use df. explode("B")? Does this mean any row with both iterable object, we will make a cross-join like explosion? Feb 17, 2023 · I have a dataframe with some columns that are lists. , unnest or explode multiple list columns into a Pandas data frame. unstack Pivot a level of the (necessarily hierarchical) index labels. I want to split each row into multiple rows accordingly and create a new row per entry. 3. Apr 10, 2023 · Exploding Multiple Columns In some cases, we may want to explode multiple columns in a Pandas DataFrame. explode method transforms each element of a list-like object to a row and replicates the index values. It returns transposed DataFrame by converting rows of the original DataFrame as columns and vice versa. To split these strings into separate rows, you can use the split () and explode () functions. Nov 29, 2024 · By using Pandas DataFrame explode() function you can transform or modify each element of a list-like to a row (single or multiple columns), replicating the index values. Series. sheet_name param on pandas. explode # Series. str. I want to explode the columns but in stead of one-to-one, I want Cartesian (multiplicative) rows to be generated. join to combine the original DataFrame, df, with the columns created using pd. For multiple columns, specify a non-empty . Oct 7, 2020 · How to implode (reverse of pandas explode) based on a column Ask Question Asked 5 years, 5 months ago Modified 3 years, 4 months ago Apr 20, 2020 · df. Feb 12, 2025 · So, while explode() works column by column, combining it with apply() gives you the flexibility to handle multiple columns like a pro. We’ll cover solutions using pandas, numpy, and combinations thereof. Does it have to go thru a for Jan 17, 2021 · Is your feature request related to a problem? I have often looked for the option to use the explode function on multiple columns at the same time. Returns: Series Exploded lists to rows; index will be duplicated for these rows. In this article, we will discuss the same, i. 3w次，点赞16次，收藏60次。大家好，我是你们的东哥。本篇是pandas100个骚操作的第5篇：使用 explode 实现 pandas 列转行的 2 个常用技巧查看全部骚操作可以点击专栏：pandas 100个骚操作在我们处理数据的过程中，经常会遇到这样的情况。工作中比如用户画像的数据中，客户使用的app类型就 pandas. Aug 26, 2025 · Learn how to use pandas explode() to flatten nested list columns into separate rows. Below is my dataframe: import pandas as pd import numpy as np df = pd. Based on your use case or need choose Nov 25, 2025 · In this article, I will explain how to explode an array or list and map columns to rows using different PySpark DataFrame functions explode(), Feb 20, 2022 · For example, will the multi-column explode result be the same as a. 5 which supports explode () only on 1 column. explode () 方法。 该方法将列表或其他嵌套的迭代器类型的列转换为单个行，复制另一个 DataFrame 的任何行索引值。 Feb 2, 2024 · We can use the explode() function with the Pandas library, which will be explained in this topic. I want to split each CSV field and create a new row per entry (assume that CSV are clean and need only Jul 3, 2024 · Pandas Multiple Columns explode [duplicate] Asked 1 year, 7 months ago Modified 1 year, 7 months ago Viewed 95 times Jul 23, 2025 · When working with Pandas, you may encounter columns with multiple values separated by a delimiter. This function converts the list elements to a row while replacing the index values and returning the DataFrame exploded list. 1 and Python 3. melt Unpivot a DataFrame from wide format to long format. t. 0, where multi-column explode was added: Since the lists after splitting the strings have the same number of elements, you can apply Series. Notice that the index values are replicated in the output. When reading fixed-length text files, you need to specify fixed width positions to split into separate columns. str. Our step-by-step guide will take you through the process! Sep 1, 2021 · Explode multiple list columns pairs to more rows in Pandas [duplicate] Asked 4 years, 5 months ago Modified 4 years, 5 months ago Viewed 2k times Learn how to efficiently transform a nested list column in a Pandas DataFrame into separate columns using `np. explode (). split () splits the string into a list of substrings based on a delimiter (e. DataFrame # class pandas. explode # DataFrame. Use the explode() Function to Explode Multiple Columns in Pandas With the explode() function, Dataframe cells with list elements are transformed to rows while replicating the index values and returning a Dataframe with the exploded lists. c. If you find yourself in a situation where you need to split a column of lists into separate rows, you’re in the right place. explode () Pandas 从 0. Arithmetic operations align on both row and column labels. Jun 30, 2025 · In this article, I will explain how to read a text file line-by-line and convert it into pandas DataFrame with examples like reading a variable-length file, fixed-length file e. pandas. Nov 13, 2024 · Pandas transpose() function is used to transpose rows (indices) into columns and columns into rows in a given DataFrame. Even though df. Nov 9, 2022 · I have a pandas dataframe in which multiple (3) column contains values corresponding to the next column. The primary pandas data Pandas explode multiple columns [duplicate] Ask Question Asked 5 years, 8 months ago Modified 4 years, 6 months ago Pandas' explode() flattens nested Series objects and DataFrame columns by unfurling the list-like values and spreading their content to multiple rows. This function simplifies the process of dealing with nested data structures by flattening them out across multiple rows, thereby making data more accessible and easier to analyze. drop_duplicates() has been running for over 15 minutes now). pandas. Apr 30, 2021 · Pandas: explode a column into multiple rows Asked 4 years, 9 months ago Modified 4 years, 9 months ago Viewed 369 times Oct 12, 2020 · I've been struggled for hours to use the explode on multiple attributes with different lenghts. Syntax of Pandas DataFrame explode () Function Following is the syntax of the Pandas DataFrame explode () Mar 27, 2022 · 1 I must use pandas 1. Apr 30, 2021 · Pandas: explode a column into multiple rows Asked 4 years, 9 months ago Modified 4 years, 9 months ago Viewed 369 times May 14, 2024 · By combining the column values into a list, we can easily achieve this transformation. Among its versatile features, the explode method is a powerful yet often underutilized tool for handling nested data, specifically lists or arrays within DataFrame columns. explode supports multiple columns, they all have to have the same element lengths as it tried to explode all columns in parallel. Pandas Pandas explode多列 在本文中，我们将介绍如何使用Pandas中的explode函数来展开（或称为展开）DataFrame中的多列。 阅读更多：Pandas 教程 什么是explode函数？ explode函数是Pandas中的一个函数，用于将DataFrame中的列表或Series类型的值（例如JSON，嵌套数据等）展开成一个或多个新行。展开后，新行将具有 pandas. reset_index() to get an index of integers, before doing the normalize and join. If you need to explode multiple columns, set the argument to a list of strings. Example: In this post, we discussed how to transform the shape of a DataFrame by using pandas. explode("A"). explode, provided all values have lists of equal size. This operation is especially useful when dealing with data where multiple items are nested within a single row’s cell. explode() method transforms each element of a list-like column (such as lists, tuples, or arrays) into separate rows, while replicating the corresponding index values. For multiple columns, specify a non-empty list with each element be str or tuple, and all specified columns their list-like data on same row of the frame must have matching length How to explode the column value without duplicating the other columns values in panda dataframe? Ask Question Asked 5 years, 11 months ago Modified 6 months ago May 10, 2018 · Explode column of lists into multiple columns Ask Question Asked 7 years, 10 months ago Modified 7 years, 1 month ago Jan 26, 2022 · The second approach worked like a charm for me as I have multiple stubnames and because the code is the most concise of all other answers. This method Jul 31, 2024 · Multiple columns can be exploded by chaining the explode method, allowing for sequential expansion of different list-like columns in the DataFrame. For multiple columns, specify a non-empty list with each element be str or tuple, and all specified columns their list-like data on same row of the frame must have matching length. What is the best way to make the dataframe explode? May 25, 2021 · Pandas - Explode multiple columns in pandas and assign value based on the exploded column Ask Question Asked 4 years, 9 months ago Modified 4 years, 9 months ago I have researched this problem and found out that Pandas' explode function does not work on multiple columns, however, I have seen a few questions submitted on StackOverflow however, none of them s Apr 10, 2023 · Exploding Multiple Columns In some cases, we may want to explode multiple columns in a Pandas DataFrame. Now, imagine this: we’re going to unpack that data using a cool trick called the explode() function! Use pandas. explode(column, ignore_index=False) [source] # Transform each element of a list-like to a row, replicating index values. Let's have a quick look. Dec 30, 2021 · This tutorial explains how to use the explode() function in pandas, including several examples. 2. By using these you can add one or multiple empty columns with either NaN, None, Blank or Empty string values to all cells. For multiple columns, specify a non-empty list with each element be str or tuple, and all specified columns their list-like data on same row of the frame must have matching length Aug 23, 2017 · 123 pandas >= 1. For example Aug 26, 2025 · Learn how to use pandas explode() to flatten nested list columns into separate rows. Combining column values into a list in Pandas is a powerful technique that allows us to aggregate data and perform calculations on grouped values. (I stumbled upon this when downgrading from pandas 2 to pandas<2 and the previous behavior made more sense to me at first, considering the docstring. DataFrame(data=None, index=None, columns=None, dtype=None, copy=None) [source] # Two-dimensional, size-mutable, potentially heterogeneous tabular data. May 17, 2020 · Tom item4 item4Val I have looked at other answers here: Split (explode) pandas dataframe string entry to separate rows pandas: How do I split text in a column into multiple rows? But the works on only one column. explode (Pandas >= 0. It depends of data. Mar 15, 2023 · I'm trying to explode dataframe that have multiple columns as list and list of length is different. Mastering Explode Lists in Pandas: A Comprehensive Guide Pandas is a fundamental library for data manipulation in Python, offering a robust set of tools to clean, transform, and analyze datasets efficiently. This method is useful for expanding nested data structures like lists into separate rows while maintaining the relationship with other columns. pop is used to remove the specified column from the existing dataframe. Parameters: ignore_indexbool, default False If True, the resulting index will be labeled 0, 1, …, n - 1. 25 版本开始提供 . This supports reading excel sheets by name or position. I would probably explode the list column with a nested generator comprehension like this: Mar 29, 2023 · Pandas apply() is a convenient function that can do many different transformations, including unnest list-like columns. Can be thought of as a dict-like container for Series objects. split('<delim>', expand=True) already returns a DataFrame, so it would probably be simpler to just rename the columns.
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