Pandas explode not working. ---This video Jan 19, 2023 · Explode is not working on pandas datafr...
Pandas explode not working. ---This video Jan 19, 2023 · Explode is not working on pandas dataframe Asked 3 years, 2 months ago Modified 3 years, 2 months ago Viewed 148 times Jul 26, 2025 · Unnest (Explode) Multiple List Columns In A Pandas Dataframe What are Pandas? Pandas is an open-source data manipulation and analysis tool built on top of the Python programming language. Since I need to explode that column (so only one name per row) I tried with this code: Dec 19, 2022 · This article by Scaler Topics covers the explode() Function in Pandas with syntax, examples, and explanations, read to know more. explode(self, column: Union [str, Tuple]) → 'DataFrame' [source] ¶ Transform each element of a list-like to a row, replicating the index values. explode() and vectorized operations. Mar 29, 2023 · 0 I am trying to run Python code in Microsoft Azure and I am having issues with getting the explode function from the Pandas library to not throw errors. This method is commonly used in data preprocessing and cleaning, especially when dealing with nested data structures or lists within DataFrame cells. (Example in the MRE below) What I ultimately want to do is use df. 4) but it does not work when I use Azure to run my code. Exploding Multiple Columns Simultaneously Since Pandas 1. We can set the index based on a column and apply the explode() function, then reset the index using the reset_index() function. The result dtype of the subset rows will be object. DataFrame({ Dec 30, 2021 · This tutorial explains how to use the explode() function in pandas, including several examples. explode() on Interests would not result in any change since the values are single strings. This happens -often when working on imported data. 0, where multi-column explode was added: Since the lists after splitting the strings have the same number of elements, you can apply Series. Your memory will not explode. explode(‘col1’), I get Nov 12, 2020 · I have tried looping the explode over each column and then after each column explode matching the first col and the exploded column and remove duplicates, doesn't work. 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. DataFrame([{'col1': ['a,b,c'], 'col2': 'x'},{'col1': ['d,b'], 'col2': 'y'}]) When I do an explode using df. Mar 9, 2025 · Pandas version checks I have checked that this issue has not already been reported. I used below code: Why does Pandas "str. 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 Learn why `pandas. This method expands list-like elements so that each item in the list gets its own row, while non-list-like elements remain unchanged. ndarray. It RETURNS a new dataframe with the changes: Apr 9, 2021 · Has anyone idea on the reason why it does not work anymore? I have already looked at other questions (e. In this blog post, we will discuss how to break a record that contains an iterable element into multiple rows by using the function pandas. Here, it is easy to pinpoint the problem since we intentionally filled the genre column with list-looking Strings. The behavior of the explode() function concerning these missing values is precise and must be understood to prevent data corruption or misinterpretation during the restructuring process. Always enjoying not being the smartest guy in the room (more to learn) so I sent this question to you pandas guru exploding with ideas. explode to the price and weight columns to the the expected output. nan for that row. It is safe. Dec 1, 2025 · When working with real-world data, it is inevitable to encounter missing data, which can take the form of None, NaN (Not a Number), or empty lists ([]). Thanks. use following code : df. Pandas: explode () doesn't work because of "AttributeError: Can only use . explode (). split () splits the string into a list of substrings based on a delimiter (e. Jul 31, 2024 · Usage of Pandas DataFrame explode () Method The explode() method in Pandas is highly useful when you need to transform each element of a list-like column into a separate row. Discover why the `explode` method in Pandas may not be functioning as expected with your DataFrame, and learn step-by-step solutions to resolve the issue. Column (s) to explode. However pandas isn't reading the data as such, rather as a string that happens to include commas. explode() fails us here without any apparent error. May 30, 2025 · In Pandas, the . The index is duplicated for the expanded rows. --- This error is raised when the str attribute is called on a pandas column with a non string data type. I have confirmed this bug exists on the latest version of pandas. g. explode method to use pandas' version when the specified column is not the geometry column. 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 pandas. That assumption simplifies the index alignment greatly. Parameters columnstr or tuple Column to explode. 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. 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. Added in version 1. Aug 30, 2021 · Bug Regression Functionality that used to work in a prior pandas version Reshaping Concat, Merge/Join, Stack/Unstack, Explode pandas. What are nested list columns? Aug 26, 2025 · Learn how to use pandas explode() to flatten nested list columns into separate rows. Jan 16, 2021 · geopandas. 0, explode can handle multiple columns at once, provided they have compatible list-like structures: df = pd. Series. The code which I have created runs perfectly fine locally on Spyder (with Pandas version 1. The explode () method in Pandas is used to transform each element of a list-like element to a row, replicating the index values. Returns: Series Exploded lists to rows; index will be duplicated for these rows. melt Identical method. Oct 4, 2022 · The explode () method of Pandas is one of many functions provided by Pandas to work with data. This routine will explode list-likes including lists, tuples, sets, Series, and np. # Tried . However, apply() is known to be slow, it iteratively applies your function to each row/column as necessary and consumes a lot more memory. Since I need to explode that column (so only one name per row) I tried with this code: Apr 9, 2021 · Has anyone idea on the reason why it does not work anymore? I have already looked at other questions (e. DataFrame. Definition and Usage The explode() method converts each element of the specified column (s) into a row. explode explodes multipart geometry, not a column, string or list. Sep 9, 2015 · I'm looking to turn a pandas cell containing a list into rows for each of those values. To split these strings into separate rows, you can use the split () and explode () functions. The thing about it is, it has to be in that format (output shown above) because it has to be uploaded in that way. explode does not do its work in place. From my perspective, explode should create a column with common dtype of all elements of lists by default because there is no a meaningful reason to change data element type from np. You case is can be split into steps: explode each column separately align the exploded columns by enumeration within each index (row). Feb 5, 2024 · This was recently changed - it should mention List or Array. Parameters: ignore_indexbool, default False If True, the resulting index will be labeled 0, 1 Apr 4, 2021 · In effect, for certain indices in the df the column value is a list. explode # DataFrame. explode(‘col1’), I get Jan 25, 2024 · Hi, I’m encountering an issue while attempting to deploy my app on Streamlit Cloud. This blog article will go through what the explode () function does and how to utilise it in a nutshell. Mar 29, 2023 · Pandas apply() is a convenient function that can do many different transformations, including unnest list-like columns. Parameters: ignore_indexbool, default False If True, the resulting index will be labeled 0, 1, …, n - 1. DataFrame. explode # DataFrame. Returns DataFrame Exploded lists to rows of the subset columns; index will be Jun 3, 2023 · Lines 8803 to 8804 in 965ceca * If specified columns to explode have not matching count of elements rowwise in the frame. To install these libraries, navigate to an IDE terminal. to_excel(file_name) – Panda Kim Nov 2, 2023 at 13:12 df. For multiple columns, specify a non-empty Sep 19, 2025 · The explode method is used to un-nest or de-list a column. The Mission: Turn a single cell of text into a clean Sep 17, 2018 · I'm working in Pandas 0. Aug 19, 2022 · Pandas DataFrame - explode() function: The explode() function is used to transform each element of a list-like to a row, replicating the index values. Notice that after the first explode, you end up having duplicated indexes. Though I guess we do have the str. May 31, 2022 · why pandas explode method not working in my dataframe? Ask Question Asked 3 years, 9 months ago Modified 3 years, 9 months ago Mar 1, 2022 · 2 Remember that df. Parameters: columnIndexLabel Column (s) to explode. Scalars will be returned unchanged, and empty list-likes will result in a np. Not going? Try it at home. I used below code: Aug 27, 2019 · 5 pandas produces unexpected results whenever you work with duplicate indexes. int64 to object. explode(column, ignore_index=False) [source] ¶ Transform each element of a list-like to a row, replicating index values. Jul 26, 2025 · Unnest (Explode) Multiple List Columns In A Pandas Dataframe What are Pandas? Pandas is an open-source data manipulation and analysis tool built on top of the Python programming language. (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. It provides powerful data structures, such as DataFrame and Series, that allow users to easily manipulate and analyze data. To fix this, we convert the values of Interests into lists. Bring your #Excel #spreadsheets to our demo and try out SheetReader in #DuckDB, #R, #Python, #pandas, and #PostgreSQL. Issue description Exploding an data frame with Jun 5, 2020 · 2 I am trying to run python script in which I am using explode () to split row into multiple rows but the condition is this we can use explode () in the higher version of pandas means pandas version should be greater than or equal to '0. I have confirmed this bug exists on the latest version of Polars. This operation is fundamental when working with data that contains nested or 21 This question already has answers here: Efficient way to unnest (explode) multiple list columns in a pandas DataFrame (7 answers) Explode multi-part geometries into multiple single geometries. 0: Multi-column explode ignore_indexbool, default False Sep 17, 2018 · I'm working in Pandas 0. How do I do explode on a column in a DataFrame? Here is an example with som pyspark. explode ¶ DataFrame. What are nested list columns? Feb 20, 2022 · Pandas version checks I have checked that this issue has not already been reported. (see what I did there?). explode not working #10606 TsiVit opened this issue Oct 29, 2023 · 6 comments needs triage Needs a response from a contributor Nov 9, 2018 · Related question: Pandas column of lists, create a row for each list element - Good question and answer but only handle one column with list. to_excel (file_name) print (df) reciving same output Jul 23, 2025 · When working with Pandas, you may encounter columns with multiple values separated by a delimiter. explode function, so it could work - but it doesn't make much sense anymore now that we have changed the string type. This method is useful for expanding nested data structures like lists into separate rows while maintaining the relationship with other columns. Aug 16, 2022 · We would like to show you a description here but the site won’t allow us. explode function does the same thing that pandas explode() function does, and we can make use of the apply() function alongside the function to explode the entire Dataframe. I’m using the . Aug 18, 2020 · You need to ensure that your column is of list type to be able to use pandas' explode(). The str accessor works only on columns whose data is a string type. Step-by-step guide with examples, handling empty lists, reset index, and related tips. Oct 2, 2012 · I have a pandas dataframe in which one column of text strings contains comma-separated values. str. Feb 16, 2024 · It seems that dask explode() method does not work with non-list values and throws unclear error. 0' So in higher version of pandas explode () is working fine. 23, and I have an array column and a boolean column. Nov 30, 2020 · This is indeed an issue, since pandas added this exlode method (the geopandas method predates pandas). We must convert these String values to lists before running explode(). Feb 2, 2024 · The Series. This is especially helpful when working with columns that contain nested or iterable data that needs to be flattened for further analysis. 0 版本中才引入的。 Feb 9, 2022 · Exploding not working in pandas as expected Asked 2 years, 11 months ago Modified 2 years, 11 months ago Viewed 58 times Does this answer your question? Split / Explode a column of dictionaries into separate columns with pandas 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. Oct 29, 2023 · . split ()" return NaN when applied to Series of lists? I am sure the answer is glaring me in the face but I cannot figure this one out for the life of me. The problem is that the data that I have to work with is from another company so it is in a different format Jun 12, 2024 · 报错的原因，我看写着DataFrame对象没有explode属性。 于是找原因，毕竟我看其他人运行的好好的。 后来才发现，是自己的 pandas 版本太低了。 要确保你安装的 pandas 版本是支持 explode 方法的。 explode 方法是在 pandas 0. to_excel ('output1. It takes each element from a list-like value (like a list, tuple, or Series) within a cell and creates a new row for each element. Polars version checks I have checked that this issue has not already been reported. You’d have to write loops or complicated functions just to break lists apart. See also #1140, we should update our GeoDataFrame. , Pandas explode multiple columns), so please do not treat this question as a duplicate, as it is not. explode to expand these columns into separate rows but first I need to get pandas to recognize the data as a list. explode ('RefList'). 4. 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. ) My only suggestion would be to perhaps make the docstring clearer. Dec 7, 2019 · I have a df like below a = pd. explode()` fails and follow our step-by-step solution to properly explode your DataFrames for cleaner data handling. explode(column, ignore_index=False) [source] # Transform each element of a list-like to a row, replicating index values. I have confirmed this bug exists on the main br Mar 23, 2022 · What do I mean by ‘exploding’ a list-like column to rows in pandas dataframe and why do we need to do it? This may sound like a rare data wrangling problem, but it is not that uncommon to see in the data world (remember, data comes to us in all shapes and formats). Like so: Column_1 ['element1', element2', 'element3'] ['element1', element2', 'element3'] etc. Fix it with Oct 29, 2025 · Explore various high-performance techniques in Pandas to transform cells containing lists or comma-separated strings into individual rows, leveraging . I want to split each CSV field and create a new row per entry (assume that CSV are clean and need only Aug 20, 2025 · Understanding explode (): Expanding List-Like Elements The explode() method serves a very specific purpose in the pandas ecosystem: transforming rows containing list-like elements (lists, tuples, sets, or Series) into multiple rows, with each element of the original list-like structure occupying its own row. I'd like to group by the boolean and each individual element in the array, to find the counts that are true and false fo Jun 21, 2020 · I think the issue is that pandas does not preserve element type at the moment. 3. cumcount() Feb 8, 2021 · 0 I have this function to split the 'text' column with each column called 'emotion'. Resetting them will yield a dataframe that works as you expect. Feb 14, 2024 · Using . xlsx') print (df) file_name ='output2. For the terminal used in this example, the command prompt is a dollar sign ($). The Xarray library works with labeled multi-dimensional arrays and advanced analytics. explode Explode a DataFrame from list-like columns to long format. Each row containing a multi-part geometry will be split into multiple rows with single geometries, thereby increasing the vertical size of the GeoDataFrame. ignore_indexbool, default False If True, the resulting index will be labeled 0, 1, …, n - 1. str accessor with string values!" Hello! I have a book dataframe where in the "authors" column there can be more than one author (names are separated by commas). While working on your data clean/transform process you often have a requirement to change the way the data is presented. I have confirmed this bug exists on the main br The explode method supports advanced scenarios for handling complex nested data, including exploding multiple columns and working with MultiIndex DataFrames. However, there is a comment in the code that in case of non-list values it fallbacks to pandas implementation but it fails. 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. explode(ignore_index=False) [source] # Transform each element of a list-like to a row. pandas. Since when applying the function, it creates another column with a list of the 'text' column. Apr 10, 2023 · Pandas is a popular data manipulation library in Python, and the explode method is a powerful tool for working with data that has nested or hierarchical structures. I attempted it in pandas and used explode, but I am open to other suggestions. Here is a working solution: To explode multiple columns at a time, you can do the following: Explode a DataFrame from list-like columns to long format. xlsx' df. , space, comma). "Why is my data exploding?" 💥 No, literally. pivot Return reshaped DataFrame organized by given index / column values. However this is working correctly with a premade dataframe, but is not working with a big dataframe. pivot_table Create a spreadsheet-style pivot table as a 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 Feb 4, 2024 · 2 That is because the Pandas developers expect that the cells in each row have the same number of elements. Feb 12, 2025 · This might surprise you: without explode(), handling lists in pandas can get pretty messy. This function converts the list elements to a row while replacing the index values and returning the DataFrame exploded list. At the command prompt ($), execute the code below. It functions perfectly on my local environment, but it seems to face difficulties accessing specific columns in pandas or performing nec… Jun 5, 2020 · 2 I am trying to run python script in which I am using explode () to split row into multiple rows but the condition is this we can use explode () in the higher version of pandas means pandas version should be greater than or equal to '0. So, take this: If I'd like to unpack and stack the values in the nearest_neighbors column so that each May 5, 2022 · The Pandas library enables access to/from a DataFrame. This can be done via groupby(). I would like to transform from a DataFrame that contains lists of words into a DataFrame with each word in its own row. It will eventually be a csv or xlsx file and it will be uploaded to our system for a customer. to_excel (file_name) df. explode('RefList'). Sep 29, 2021 · 5 If you have a Pandas version prior to 1. 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. That is because the Pandas developers expect that the cells in each row have the same number of elements. explode() method in Pandas to solve a massive industrial mapping problem. 25. The best way to explain it is to show you a real-world example. When working with pandas and attempting to use the ` explode () ` function, it’s essential to ensure that the columns being exploded contain lists of elements with matching counts. 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. Among its vast array of features, the explode () method introduced in version Attempting to use explode in pandas dataframe results in no change to the data Asked 5 years, 4 months ago Modified 5 years, 4 months ago Viewed 367 times Nov 2, 2023 · NICK_CS 35 8 pandas functions do not inplace as default. I have been trying to split a column of lists into multiple columns. explode # Series. (In my answer the self-def function will work for multiple columns, also the accepted answer is use the most time consuming apply, which is not recommended, check more info When should I (not) want to use pandas apply () in my code?) Feb 20, 2024 · Introduction Pandas, an open-source data manipulation and analysis tool in Python, continues to be an indispensable tool for data scientists and analysts. I'd like to group by the boolean and each individual element in the array, to find the counts that are true and false fo See also DataFrame. pandas. Sep 12, 2023 · The explode method in Pandas is a handy tool for "exploding" these nested structures into separate rows, making it easier to work with and analyze your data. bmsikgmjrvggnwsxrbtxyenieqtyiexwrptqtqmflfhpfgmmqpp