so I searched a lot and maybe I'm just not experienced enough with programming to figure my issue out by myself. OverflowAI: Where Community & AI Come Together, Convenient way to deal with ValueError: cannot reindex from a duplicate axis, Behind the scenes with the folks building OverflowAI (Ep. Reset your index and try again. xlsxwriter: None Asking for help, clarification, or responding to other answers. 1. df.index.is_unique. Were all of the "good" terminators played by Arnold Schwarzenegger completely separate machines? What is the difference between 1206 and 0612 (reversed) SMD resistors? # ffill for categoricals, linear otherwise, # ValueError: cannot reindex from a duplicate axis, "cannot reindex from a duplicate axis" when groupby().apply() on MultiIndex columns, https://stackoverflow.com/a/38964596/336001, BUG: GroupBy.apply() throws erroneous ValueError with duplicate axes. Are self-signed SSL certificates still allowed in 2023 for an intranet server running IIS? What is the least number of concerts needed to be scheduled in order that each musician may listen, as part of the audience, to every other musician? I never resolved my earlier problem, I managed to get around it by performing my operations along the other axis and transposing. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. What is the cardinality of intervals in space, and what is the cardinality of intervals in spacetime? I realize I didnt, New! By executing this code. How to handle repondents mistakes in skip questions? Makes no sense to do this. Not the answer you're looking for? I believe this is a bug because, as described below, essentially the same operations can be successfully run along the other axis. The result fills in missing dates with 0's: Thanks for contributing an answer to Stack Overflow! OverflowAI: Where Community & AI Come Together, How to fix "ValueError: cannot reindex from a duplicate axis", Behind the scenes with the folks building OverflowAI (Ep. numpy: 1.13.0 rev2023.7.27.43548. Help identifying small low-flying aircraft over western US? LC_ALL: None You signed in with another tab or window. Are modern compilers passing parameters in registers instead of on the stack? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. I get this Error. I have shared the same code but will yahoo as a provider where i was able to, @newcoder - It depends of data - if check first DataFrame, there are 2 rows for, @newcoder - Reason for duplicated datetimes is there are mutiple hours for one day before, New! Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Do the 2.5th and 97.5th percentile of the theoretical sampling distribution of a statistic always contain the true population parameter? Thanks @smithto1, the instructions look pretty clear. Connect and share knowledge within a single location that is structured and easy to search. I understand from other posts that this happens when you have a duplicate columns but I don't see how I can given I am adding the missing columns. @user1315621 - Missing values are expected output, because in DataFrame if some group no match are filled NaNs, so only matched groups are fileld by dates, another not. Are arguments that Reason is circular themselves circular and/or self refuting? The British equivalent of "X objects in a trenchcoat". What is the cardinality of intervals in space, and what is the cardinality of intervals in spacetime? I guess there are duplicated columns names in one or both DataFrames, solution is deduplicated them before your solution manually or by code below: Thanks for contributing an answer to Stack Overflow! Manga where the MC is kicked out of party and uses electric magic on his head to forget things, "Pure Copyleft" Software Licenses? What is involved with it? Because i have many types inside the Type column. How can I identify and sort groups of text lines separated by a blank line? Can you provide some sort of the explanation of what your program is doing? How to handle repondents mistakes in skip questions? Author: lookstyle.com.ar; Updated: 2022-11-28; Rated: 88/100 (8365 votes) High: 88/100 ; Low: 54/100 ; Summary: cannot reindex from a duplicate axis groupby I am not entirely sure I understand why this is occuring either. But resetting the index or dropping the blocksize argument didn't work here either. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. Asking for help, clarification, or responding to other answers. Capital loss carryover in low-income years with capital gains. Even if you "cannot reindex from a duplicate axis", Pandas tries to do it by assigning a rank to letters by their alphabetical order when the sort property is activated, for instance : Even if we have 2 B's the incrementation is possible by considering the second B comes logically after the first B. How can I achieve that? As mentioned by @jezrael "problem is duplicated values in DatetimeIndex, so reindex cannot be used here", I have used the same code earlier and it worked fine. How do Christians holding some role of evolution defend against YEC that the many deaths required is adding blemish to God's character? Can a judge or prosecutor be compelled to testify in a criminal trial in which they officiated? This fails: this is very very odd to odd. Making statements based on opinion; back them up with references or personal experience. what is illogical considering the alphabetical order is this: Making statements based on opinion; back them up with references or personal experience. I think you can just set the index in this case (this is internally where the error happens), rather than re-index, as its a transformation. You can try this: Pandas would not know how to perform when there are duplicate indices. Connect and share knowledge within a single location that is structured and easy to search. Possible solution is use DataFrame.join with helper DataFrame by all values: data = data.set_index (data.index.normalize ()) full_dates = pd.date_range (start, end) df = pd.DataFrame ( {'date':full_dates}).join (data, on='date') print (df) date bidopen . Shouldn't be too hard to have it visible on the table either right? The index.is_unique method will return a boolean value. Connect and share knowledge within a single location that is structured and easy to search. Simply testing if the values in a Pandas DataFrame are unique is extremely easy. Learn more about Teams Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing. Apply rowExpl to each row and concatenate Are self-signed SSL certificates still allowed in 2023 for an intranet server running IIS? "Pure Copyleft" Software Licenses? A function to get monthly data for the current row: It converts the input Series of dates (for a single month) into the "new" content of Would fixed-wing aircraft still exist if helicopters had been invented (and flown) before them? Does your actual problem have anything to do with this question, code, or data? Is the DC-6 Supercharged? I get ;), New! By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Find centralized, trusted content and collaborate around the technologies you use most. Can I board a train without a valid ticket if I have a Rail Travel Voucher. To learn more, see our tips on writing great answers. Asking for help, clarification, or responding to other answers. To test it, I installed pandas 1.1.0 in a virtual environment and manually patched the lines in core/groupby/ops.py following #35441. Any suggestions are much appreciated. By clicking Sign up for GitHub, you agree to our terms of service and To what degree of precision are atoms electrically neutral? tables: None What is the difference between 1206 and 0612 (reversed) SMD resistors? I encounter this problem every time I try to add a new column to a pandas dataframe by concatenating string values in 2 existing columns. And yes, there are similar questions on SO, but I haven't found any that deal with the fact that there will inherently be duplicates in the indices and I want one to overwrite the other. - Oliver Scott. ): EDIT: Am I betraying my professors if I leave a research group because of change of interest? the partial results into a single output DataFrame: Don't be disaffected by seemingly too low precision of Amount column. For example the chunks of code below works perfectly: Because D comes after C, C comes after B and so on Not the answer you're looking for? How can I change elements in a matrix to a combination of other elements? Can I board a train without a valid ticket if I have a Rail Travel Voucher. How to help my stubborn colleague learn new ways of coding? Teams. Why do code answers tend to be given in Python when no language is specified in the prompt? cannot reindex from a duplicate axis groupby applyretroid pocket 2 plus gamecube games. Making statements based on opinion; back them up with references or personal experience. OverflowAI: Where Community & AI Come Together, Pandas - ValueError: cannot reindex from a duplicate axis, Behind the scenes with the folks building OverflowAI (Ep. By definition pandas wants to align return objects. Epistemic circularity and skepticism about reason. i think you are trying to assign 2+ same names to 2+ columns. Why is an arrow pointing through a glass of water only flipped vertically but not horizontally? OverflowAI: Where Community & AI Come Together, Pandas merge error: cannot reindex from a duplicate axis, Merge pandas dataframe on time and another column, Behind the scenes with the folks building OverflowAI (Ep. OS-release: 8 Last convert MultiIndex by flattening with map and join: I'm able to successfully apply your code and produce the output you want by iterating over the groups rather than using apply: And in fact, the issue is in the apply method, as your function is not needed to produce the error: df.groupby('subsystem-sensor-parameter', as_index=False).apply(lambda x: x). Making statements based on opinion; back them up with references or personal experience. At least, I believe that's it. Maybe that helps someone with my problem: My file has 54,864,237 lines and no index in the file. Would fixed-wing aircraft still exist if helicopters had been invented (and flown) before them? Not the answer you're looking for? pymysql: None 594), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned, Preview of Search and Question-Asking Powered by GenAI. ? I assume .diff() processing sorted data. The text was updated successfully, but these errors were encountered: I've just found a simpler MWE. Not the answer you're looking for? pytz: 2017.2 What do multiple contact ratings on a relay represent? LANG: None Thanks for contributing an answer to Stack Overflow! To learn more, see our tips on writing great answers. 594), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned, Preview of Search and Question-Asking Powered by GenAI, "ValueError: cannot reindex from a duplicate axis", ValueError: cannot reindex from a duplicate axis, ValueError: cannot reindex from a duplicate axis (python pandas), ValueError: cannot reindex from a duplicate axis Pandas, ValueError: cannot reindex from a duplicate axis Error in Pandas, pandas: cannot reindex from a duplicate axis, pandas : cannot reindex from a duplicate axis error, Python cannot reindex from a duplicate axis, Single Predicate Check Constraint Gives Constant Scan but Two Predicate Constraint does not, On what basis do some translations render hypostasis in Hebrews 1:3 as "substance?".
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