Connect and share knowledge within a single location that is structured and easy to search. Edit: changed case from df['sentiment'] to df['Sentiment']. How do I expand the output display to see more columns of a Pandas DataFrame? Hi @mahjoub.faraj. How to Fix ValueError: Columns be Must be Same Length as Key in Python? Why typically people don't use biases in attention mechanism? How to Fix Pygame GUI Window Not Opening, Loading, or Working? Making statements based on opinion; back them up with references or personal experience. If you're trying to replace values in an existing column and got this error (case 3(a) below), convert the object to list and assign. ValueError In essence, this usually occurs when you have more than one data frames and in the process of writing your program you are trying to use the data frames and their data, but there is a mismatch in the no of items in each that the program cannot process until it is fixed. and the reason behind this is that we cannot represent a single column with two names in. When you attempt to replace the values of an existing column with a DataFrame (or a list-like object) whose number of columns doesnt match the number of columns its replacing. WebValueError: Columns must be same length as key (Split column in multiple columns using python) Ask Question Asked 3 years ago Modified 3 years ago Viewed 616 times 2 The question has been asked a lot, however I'm still not close to the solution. [Code]-Pandas ValueError: "Columns must be same length as key" Using the second, I get the same error thrown as before. 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI, numpy.unique: ValueError: all the input arrays must have same number of dimensions, TypeError: PyQt4.QtCore.QVariant represents a mapped type and cannot be instantiated, ValueError: arange: cannot compute length, Reverse geocoding of Pandas DataFrame with Lat/Long columns, Folium: ValueError: key_on `'FIPS'` not found, "ValueError: Point coordinates must be finite." ValueError: columns must be same length as key col2 2 col1 3 DataFrame import pandas as pd df = pd.DataFrame ( {'col1': [1, 2, 3], 'col2': [4, 5, 6]}) Using the extract method, I get the correct columns, but no rows.