Pandas get index of row. query("two > 5") And get_level_values.

Pandas get index of row Ask Question Asked 3 years ago. The labels can be integers, strings, or any other hashable type. shift(-1) df['Next Week Close'] = df['Close']. iloc selects rows based on an integer index. If it's a range of index values, it'll return a subset of those rows. A==2]. The index of the row. head(10) Close Next Close Next Week Close 0 0 1. loc[[5 Sep 29, 2023 · While analyzing the real datasets which are often very huge in size, we might need to get the rows or index names in order to perform some certain operations. 38 1999-11-22 44. values. we can also get the index itself of the given DataFrame by using the . index. Let’s see how we can actually implement this in Python programming. iloc[] with the syntax [start:stop:step]; where start indicates the index of the first row to start, stop indicates the index of the last row to stop, and step indicates the number Jul 2, 2017 · I have been worried about how to find indices of all rows with null values in a particular column of a pandas dataframe in python. Aug 30, 2017 · Python pandas - get index of rows. I can get the value, and I can set the value - which is what I want. idxmin(): This function returns index of first occurrence of minimum over requested axis. loc[pd Feb 20, 2024 · Summarizing DataFrames in Pandas Pandas DataFrame Data Types DataFrame to NumPy Conversion Inspect DataFrame Axes Counting Rows & Columns in Pandas Count Elements & Dimensions in DF Check Empty DataFrame in Pandas Managing Duplicate Labels in DF Pandas: Casting DataFrame Types Guide to pandas convert_dtypes() pandas infer_objects() Explained Jul 29, 2013 · How to get only the rows' indexes for a pandas dataframe. name])[0] 1 Note that Index. reset_index(drop=True, inplace=True) As it will edit the df1 dataframe without making a copy of it. import pandas as pd from csv import DictReader def make_downsampled_df(filename, interval Jan 1, 2008 · pandas is taking what's inside the [] and deciding what it should do. Feb 6, 2016 · Is it possible to get the row number (i. I'm using data. com Jul 16, 2021 · You can use the following syntax to get the index of rows in a pandas DataFrame whose column matches specific values: df. n = np Dec 4, 2024 · Pandas is the most popular Python library that is used for data analysis. 307 11 Given a dataframe, I want to get the duplicated indexes, which do not have duplicate values in the columns, and see which values are different. set_index([df. get_loc Apr 30, 2015 · I am looking for a way to get both the index and the column of the maximum element in a Pandas DataFrame. 686 20070331 3. 15. 798 0. For example, suppose that I want to get the label index of the last row of my pandas dataframe df. (there can be NaN values in other column e. get_loc# Index. index[0],'VALUE') If there is more than one row filtered, obtain the first row value. Now I want to check what is the title of row 32. nba. 410599 0. Is it possible to determine this? Apr 18, 2012 · Example': if you have string values as your index labels, like rows 'a' through 'e', you might want to know that the max occurs in row 4 (not row 'd'). ix[i] exchange = row['exchange'] Aug 5, 2017 · Making the first (or n-th) column the index in increasing order of verboseness: df. 764052345967664. index[0], 'Btime'] df. get_loc (key) [source] # Get integer location, slice or boolean mask for requested label. Example 1: For grouping rows in Pandas, we wi Jan 30, 2023 · 如何删除 Pandas DataFrame 列; 如何在 Pandas 中将 DataFrame 列转换为日期时间; 如何在 Pandas DataFrame 中将浮点数转换为整数; 如何按一列的值对 Pandas DataFrame 进行排序; 如何用 group-by 和 sum 获得 Pandas 总和; 相关文章 - Pandas DataFrame Row. In order to get the row number from the Pandas DataFrame use the df. 24. I want to find not just the max value Nov 20, 2020 · If I understand correctly, you should be able to use shift to move the rows by the amount you want and then do your conditional calculations. Use pd. Generally speaking, pass the named index value to index. name: Nov 18, 2016 · For the point that 'returns the value as soon as you find the first row/record that meets the requirements and NOT iterating other rows', the following code would work:. iloc[] attribute is used for integer-location-based indexing to select rows and columns in a DataFrame. csv C/C++ Code # Import pandas packag Apr 27, 2019 · I just want to know if there is any function in pandas that selects specific rows based on index from a dataframe without having to write your own function. Nov 7, 2018 · import pandas as pd data = pd. DataFrame({'Close': np. Pandas DataFrame의 행 수를 얻는 방법; Pandas에서 DataFrame 행을 무작위로 섞는 방법; Pandas의 열 값을 기반으로 데이터 프레임 행을 필터링하는 방법; Pandas에서 DataFrame의 행을 반복하는 방법 Dec 26, 2018 · How do I get all rows where values in level "two" are greater than 5? col one two b 7 4 9 5 c 7 10 d 6 11 8 12 8 13 6 15 This can be done using query, df2. def pd_iter_func(df): for row in df. See full list on pythonguides. loc selects rows based on a labeled index. I am a beginner of Pandas. unique() #get dup. 151357 -0. 1. Just directly do df. index[-1] To get the First element index: dataframe_object. And now the data frame comes down to this: fname age sal 0 Alex 20 100 2 John 25 300 3 Lsd 23 392 4 Mari 21 380 I would like to get the value from row index 3 and column "age". get_level_values('two') > 5] Note Apr 3, 2017 · row_number = df. e value from 0 to n-1 index location and there are many ways to convert these index values into a column in a pandas dataframe. Get index of row Pandas using the . I have tried . get_indexer only works with arrays, hence the need to get the first element of the answer. Getting lists of indices from pandas dataframe. 000 0. read_csv('traj2_Binarization. In this case, the value is always the first element. iterrows(): print row. See desired colu where 5, 18, 125 are the index. That is, I determine the median this way: df. 950088 -0. If the index value isn't what you were looking for then you can use enumerate. However, the number of day changes by month, and personnel also changes occasionally, which means the number of col Aug 21, 2013 · If you're only getting these to manually pass into df. index[0] To get the index of first x elements index: dataframe_object. astype(int) returns [4], but what I would like to get is just 4. There will be an exception if the filter results in an empty data frame. . I am having a problem iterating on the index. id 30444. Series Mar 11, 2019 · When using itertuples you get a named tuple for every row. Pandas: Access row number. get_loc(row_of_interest_named_index) Since you’re dealing with dates it may be more convenient to retrieve the index value with . values) You can use both if you want a multi-level index: df. Index to name an index (or column) from construction. csv', sep=",", index_col="NAME") for index, row in data. Example 1 # Subset a single row of the DataFrame print (df. 451852 2015-01-14 0. Index. 0 NaN 2 2 3. Pandas Index doc; Pandas Series doc Jun 9, 2014 · I'm trying to get the row of the median value for a column. I may want to find the index of the row fulfilling ('c' == 6). Remember index starts from 0, you can use pandas. In [28]: temp Out[28]: index time complete row_0 2 2014-10-22 01:00:00 0 row_1 3 2014-10-23 14:00:00 0 row_2 4 2014-10-26 08:00:00 0 row_3 5 2014-10-26 10:00:00 0 row_4 6 2014-10-26 11:00:00 0 In [29]: temp. To answer the original question: yes, you can access the index value of a row in apply(). index[0] Out[1]: 0 Out[2]: 4 Nov 28, 2024 · Each row in a dataframe (i. How can I get index of rows in pandas? 2. duplicated()] and then iterating over the unique entries with unique. Jul 30, 2020 · Here is a sample df >> real one > 500k rows. EDIT: Or you can run a loc() and access the first element that way. DataFrame; Select elements of pandas. iterrows(): print(row) -----results------ RUNX3 0 Dec 19, 2023 · 1. index property in pandas is utilized to retrieve the indices of rows in a DataFrame or Series that match a specified condition. randn(8, 4),columns=['A', 'B', 'C', 'D']) df = df. 90 Feb 2, 2024 · Get Index of Rows With pandas. While finding the index of the minimum value across any index, all NA/null values are excluded. index[0]) The current answers, except one, explain how to get the index label rather than the row number. First, let’s create a simple dataframe with . 978738 2. You can pass a single integer value as the row index to select a single row across all the columns from the dataframe. I know the integer index of it. 85 Arunachal Pradesh 18796. 59 Chhattisgarh 260786. 196 2. By default, you can access the index value for that row with row. Thus far, this is my code: idx = range(0, 50, 5) col = range(0, 50, 5) scores = pd. iterrows. Feb 26, 2019 · Currently I'm trying to automate scheduling. 867558 -0. Iterating through pandas objects is generally slow. The index (row labels) of the DataFrame. index() function. set_index(list(df)[0]) df. 2 sub-questions: How can I get the position of index 18? For multiple conditions: Let's say we have: s = pd. where(df['b']. index [df[' column_name ']== value ]. itertuples(), 1): print(i, row. nonzero()[0] %timeit np. df2[df2. Parameters: key label Returns: int if unique index, slice if monotonic index, else mask May 13, 2017 · Please update the original question to include the correct definition of df (they way it is typed now, it is not a valid Pandas dataframe; I assumed that it had 12 rows, three columns A, B, and C, and a repeated index). Jun 19, 2023 · Retrieving the index of a row in a Pandas DataFrame as an integer is a common task in data analysis and manipulation. Basically, I want to retrieve the label index of a row of my pandas dataframe. Andhra Pradesh 609949. val Walk through one row at a time and add the nth row to a new dataframe. itertuples returns a namedtuple for each row. index[0] In [2]: a[a['c1'] > 7]. Aug 8, 2023 · You can select and get rows, columns, and elements in pandas. Jun 20, 2013 · In Pandas, how can I get a list of indices of a series/dataframe for the entries that satisfy some property? The following returns a Series object my_dataframe. set_index(df. Two work around's Apr 26, 2016 · I am trying to iterate through the dataframe row by row picking out two bits of information the index (unique_id) and the exchange. iloc[0]. I want to get the column number/index of the minimum value in the given row. itertuples(index=False)): # do something df. 285372 2015-01-12 0. The index of a DataFrame is a series of labels that identify each row. drop([1]). 163 -0. get_loc('2015-01-17') df. 915 12. tolist () The following examples show how to use this syntax in practice with the following pandas DataFrame: Feb 2, 2024 · This article introduces how to get the index of rows whose column matches the specific value in Pandas. Passing those as index or column on dataframe construction constructs frames with named indices/columns. Aug 8, 2023 · [Slice of row number/name]: Get single or multiple rows as pandas. In many cases, iterating manually over the rows is not needed and can be avoided with one of the following approaches: Oct 30, 2014 · If you want to pull out only the index values for certain integer-based row-indices, you can do something like the following using the iloc method:. Jun 25, 2015 · I need to get row numbers with unique values in x. where Aug 20, 2013 · I'm impressed with all the answers here. 338112 2015-01-13 0. The code I found was: df. Once all instances are found, I would like to print those out. The . columns[0]]) pandas. So, if you want to select the row with an index label of 5, you would directly use df. A b c 0 1 q1 1 1 2 NaN 3 2 3 q2 3 3 4 q1 NaN 4 5 q2 7 And I want the index of the rows in which column b is not NaN. where(np. index() My understanding is that the row is a Pandas series. index[0] to the end of a query. 00 1999-11-23 40. So, in your case, for an index i in a for loop, you could index ts. Pandas - How to get index values from a dataframe. index[row] Question) Is there a more elegant syntax to get and set the value, when you always work with a row number? I always iterate over the row numbers, never iterate over Timestamps. If you want to assign this change to original dataframe it is easier to use: df1. idx = df. 19 Bihar 413513. seed(0) df = pd. I want to get the column location of the minimum value. 094763 2015-01-10 0. DataFrame, pandas. This is not a new answer, just an attempt to summarize the timings of all these methods. 836742 2015-01-09 0. The index labels of the DataFrame. index property. Specifically, I have this dataframe: import pandas Aug 11, 2021 · However, it works. itertuples(): # Define your criteria here if row. 907 NaN 7. In this article, we explored different methods to achieve this, including using the iloc , get_loc , loc , query methods, and the index attribute. Yields: index label or tuple of label. Get row index from DataFrame row. reset_index(drop=True) This resets the index to the default integer index and removes the original one. Sep 26, 2017 · I have a pandas dataframe with one column and I would like to know the index of the median. 702 0. dataframe_object. duplicated()]. 741 1. 06 The index (row labels) of the DataFrame. close date 1999-11-18 44. A print row. 163001 2015-01-15 0. Example 2 Sep 11, 2019 · when I apply sort function to Dataframe index are not printed only values are printed. index returns the list of all the index, to get any range of index you can use the list properties. Hence we can use it to find the position in the index: >>> ser = df. 817 0. Additionally, I would like to be able to call upon each index for further applications within the script. For example, I want to get the row number that has a ’35days’ value in the ‘Duration’ column. e. Jan 1, 2015 · Really simple using index. iloc[-1]. If I want to find the Timestamp from a row, I can do like this: df. 196 NaN 3. 400157 0. I tried: df. 103219 0. I'd like to get the line before (or after) a certain index. provide quick and easy access to pandas data structures across a wide range of use cases. index Out[29]: Index([u Nov 27, 2024 · While analyzing the real datasets which are often very huge in size, we might need to get the rows or index names in order to perform some certain operations. 837647 2015-01-18 0. Seriesの[]によるインデックス指定で、行・列および要素を選択し抽出・取得できる。[]に指定する値のタイプによって取得できるデータが異なる。 pandas. DataFrameの列を抽出[列名]: 単独の Dec 2, 2024 · Pandas Get Row Number. 103 NaN 10. get_value(df_filt. iloc[655]) By specifying both the row and column indices to the iloc function, you can also view a specific data point. iat[0, df. index() is the easiest way to achieve it. DataFra # create new column with shifted values from the departure time column df['next_column_value'] = df['column_value']. 262086 2015-01-08 0. get_indexer([ser. df. pivot_table(index = 'title', columns = 'userId', values = 'rating') So, for each 'title' I have row of some numerical data. You can specify index=False so that the first element is not the index. 0 NaN 3 3 . For instance, I have index 18 (eg. shift(1) # create row iterator that can 'save' the next row without running for loop row_iterator = df. iloc[ROWS,COLS]. How can I retrieve an index value of a row, given a condition? For example: dfb = df[df['A']==5]. I'll get requirement as a . loc[0,'A'] print row. Python retrieve row index of a Dataframe. Obligatory disclaimer from the documentation. Option 1. 732 1. Oct 26, 2021 · In today’s short guide we discussed how to retrieve the index of rows whose column matches a specified value. Series by numbers/names [Number/name]: Get the value of a single element [List of numbers/names]: Get single or multiple elements as pandas. columns. 227053 2015-01-17 0. The actual value you are trying to index on is: 1. May 24, 2013 · For pandas 0. Strangely, when given a slice, the DataFrame indexing operator selects rows and can do so by integer location or by index label. Pandas create row number - but not as an index. Modified 8 years, 2 months ago. iterrows [source] # Iterate over DataFrame rows as (index, Series) pairs. Feb 4, 2019 · I have one pandas dataframe, with one row and multiple columns. Oct 8, 2017 · What is the pandas way of finding the indices of identical rows within a given DataFrame without iterating over individual rows? While it is possible to find all unique rows with unique = df[df. csv file. set_index['your_col_name', drop=False], already. 如何获取 Pandas DataFrame 的行数 Sep 17, 2014 · I have a dataframe which looks like this: df_raw. I have written this function, but I would like to know if there is a shortcut. if you want the integer position of that label within the Index you have to get it manually (which can be tricky now that duplicate row labels are allowed). It's very rare in pandas that you need to get an index as a Python list (unless you're doing something pretty funky, or else passing them back to NumPy), so if you're doing this a lot, it's a code smell that you're doing something wrong. If A is one of the entries in df. Dec 19, 2016 · To get the index by value, simply add . For example, we delete row index 1 using df. DataFrame and pandas. median() This gives me the median value, but I would like to know the index of that row. 25 1999-11-24 41. Dec 9, 2016 · I'm not sure if I completely understand your question, but in general, you can index through a pandas data frame by using df. name) enumerate takes the place of an ugly counter construct Nov 5, 2024 · Using the index we can select the rows from the given DataFrame or add the row at a specified Index. 764052 0. Sep 19, 2017 · Suppose a Pandas dataframe looks like: BoxRatio Thrust Velocity OnBalRun vwapGain 5 -0. set_index('A') print df B C D A 1. Please see my code: for i, row in staticData. First, let's create a simple dataframe with nba. Trivial code with index lables not corresponding to row numbers: Dec 8, 2021 · In this tutorial, you’ll learn how to use Pandas to get the row number (or, really, the index number) of a particular row or rows in a dataframe. DataFrame. Sep 27, 2021 · You can see that the index of this second row, here b, is kept as the name of the series. for idx, row in enumerate(df. index[0:x] To get the index of last x elements index: Nov 18, 1999 · I have this dataframe where date is used as index. 0 numberOfItems Dec 16, 2016 · Forgive me if the answer is simplistic. 915 NaN 15. 247186 2015-01-16 0. index along with sort but not working. Sep 4, 2018 · How do I get the row index in pandas? 2. index Building upon Alex's answer, because dataframes don't necessarily have a range index it might be more complete to index df. Viewed 3k times 2 I have a dataframe with Apr 20, 2018 · I am trying to determine the appropriate syntax for this Pandas Dataframe on how to index for all instances where the column 'Channel' is either equal to either A or B. c ) non_nana_index = [0,2,3,4] May 23, 2018 · Don't extract the index, see options below. The data of the row as a Series. arange(8)}) df['Next Close'] = df['Close']. But I have It returns pandas index correctly. I've come to the following solution: x = pv. median() to get the median value for 'column'. 103 7. May 1, 2017 · df1. 75 I used this approach to iterate, but it is only giving me part of the solution - after selecting a row in each iteration, how do I access row elements by their column name? Here is what I am trying to do: for row in df. In this article, I will explain the index property and using this property how we can get an index of DataFrame and also explain how to get the index as a list UPDATE: This is the same as asking how to get the name of the index for a series, but phrased differently. iloc[i+1,:], to get all of the info from the next row in the ts dataframe. Get the index of the label, and slice accordingly. by doing df[df. For example, Name Age City 0 John 25 New York 1 Alice 28 London 2 Bob 32 Paris Oct 8, 2016 · Pandas: Get datetime index value from row. to_numpy() Then I did something with this data and find that row I need has index 32. In most situations, for performance reasons you should try and use df. 918334 Let's say, a few rows are now deleted and we don't know the indexes that have been deleted. Nov 14, 2024 · 2. Select columns by column numbers/names using [][Column Dec 9, 2020 · . index() If you would like to find just the matched indices of the dataframe that satisfies the boolean condition passed as an argument, pandas. iloc[1] >>> df. First, let's create a Pandas dataframe. For example: selecting rows with index [15:50] from a large dataframe. Jun 12, 2015 · This returns the first element in the Index/Series returned from that selection. isnan(df['b']))[0] %timeit pd. I considered the case of a series with 25 elements and assumed the general case where the index could contain any values and you want the index value corresponding to the search value which is towards the end of the series. There may be many times when you want to be able to know the row number of a particular value, and thankfully Pandas makes this quite easy, using the . e level=0) has an index value i. Jul 15, 2021 · Then we will use the index attribute of pandas DataFrame class to get the index of the pandas DataFrame object. iterrows(): unique_id = staticData. Note. import pandas as pd import numpy as np np. import pandas as pd import numpy as np df = pd. B > 3: return row Pandas 그룹 및 합계를 집계하는 방법; 관련 문장 - Pandas DataFrame Row. 0 1 1 2. This makes interactive work intuitive, as there’s little new to learn if you already know how to deal with Python dictionaries and NumPy arrays. A > 4 and row. 00 1999-11-19 40. It is available under the key name and requires that you specify axis=1 (because the lambda processes the columns of a row and not the rows of a column). I have a dataframe df: 20060930 10. 454274 0. dataframe. This was shorter and is the way I have implemented it in the past. 5 someProperty 3. get_loc('colname') The above code asks for a column name. e Sep 30, 2015 · I have a data set which has multiple columns, strings and integers I want to map all strings to integers, so I want to iterate over rows and columns and replace all strings with integer values The way I do this is For example there is a 'marital status' column, its field can have 'single,married,divorced' status, so if a field contains single, I would map it to 0 Jul 2, 2020 · b) Get row index label or position of minimum values among rows and columns : Dataframe. DataFrame(np. 2. 3. loc[:,'some_column'] == 'some_value' pandas. iloc[idx - 10 : idx + 10] A 2015-01-07 0. What is does not handle is taking a single index value. itertuples() # jump to the next row using the row iterator last = next(row_iterator) # because pandas does not support items May 4, 2018 · Here are tests for a few methods: %timeit np. The index is used for label-based access and alignment, and can be accessed or modified using this attribute. Viewed 5k times 3 . shift(-7) df. I create 2d array out of this numerical data: matrix = matrix_df. get_loc. – Dec 18, 2021 · Get column index of max value in pandas row. Returns: pandas. This will return the index of the first row of the result So, applied to your dataframe: In [1]: a[a['c2'] == 1]. df[2:3] This will slice beginning from the row with integer location 2 up to 3, exclusive of the last element. Also though the answer is the same as another question, the question is not the same! Specifically, this question will be found when people Google for "pandas index of row" rather than "pandas name of series". pandas: get the value of the index for a row? 1. head() Ticker FY Periodicity Measure Val Date 0 BP9DL90 2009 ANN CPX 1000. Series(['a', 'a', 'c', 'c', 'b', 'd']) And we want to find the first item different than a and c, we do:. for i, row in enumerate(df. Specifically, we showcased how to get the indices using the index property of pandas DataFrames as well as the where() method of NumPy library. Pandas has Index (MultiIndex) objects that accepts names. query(f'numbers == {m}'). 00 2008-03-31 00:00:00 1 BP9DL90 Dec 18, 2018 · Each row in a dataframe (i. index (since dataframe indexes are built on numpy arrays, you can index them like an array) or call get_loc() on columns to get the integer location of a column. Select Rows by Index using Pandas iloc[] pandas. 144044 1. itertuples instead of df. I am trying to get the row index of every instance where column ‘Trigger’ is == 1 so I can get the value in column ‘Price’. In Pandas, an index refers to the labeled array that identifies rows or columns in a DataFrame or a Series. iloc[0], df. data Series. Let's discuss how to get row names in Pandas dataframe. set_index(), that's unnecessary. csv The DataFrame indexing operator completely changes behavior to select rows when slice notation is used. Dec 18, 2018 · Each row in a dataframe (i. index), and I want to get the line before, and I don't know that this line has 5 as an index. As you can see, column b is used as an index. iterrows() and extracting the indices of equal entries with help of pd. The column being tested can be either an index column (as with b in this case) or a regular column, e. g. iloc[[0,1,4]]. As we apply the index attribute on the pandas DataFrame object, it returns a tuple that contains the index list of the DataFrame. My dataframe doesn't have column names. How do I get the integer index ([3,4,5]) instead using pandas API? Get index of a row of a pandas dataframe as an integer. If it's a subset of column names, it'll return a DataFrame with those columns. Modified 2 years, 5 months ago. 0 7. isnull(df['b']). May 17, 2017 · From Pandas data frame, how to get index of non "NaN" values? My data frame is. 1) Get row index label of minimum value in every column : May 24, 2013 · For pandas 0. 981 20061231 15. Solution. DataFrame; loc and iloc [Boolean array/Series]: Get True rows as pandas. get_level_values("Код") #get index level values dups = x[x. Ask Question Asked 8 years, 2 months ago. get_loc: df. 133500 2015-01-11 0. 10, where iloc is unavailable, filter a DF and get the first row data for the column VALUE: df_filt = df[df['C1'] == C1val & df['C2'] == C2val] result = df_filt. 07 Assam 224247. random. Series by index (numbers and names) using [] (square brackets). A tuple for a MultiIndex. This is causing me troubles later in the code. It provides highly optimized performance with back-end source code is purely written in C or Python. It’s a straightforward Python method where we can apply a condition to the DataFrame or Series and use . Mar 24, 2016 · pandas rounds values when it prints a dataframe. Let’s discuss how to get row names in Pandas . 98 Goa 45012. columns[0]) df. So, if you want to select the 5th row in a DataFrame, you would use df. columns then I need to find indices of each row with null values in A Feb 12, 2018 · pandas. Let's see how to group rows in Pandas Dataframe with help of multiple examples. isna())[0] %timeit df. Mar 12, 2020 · matrix_df = data. 218 8 0. index to get the indices where this condition is True. iterrows# DataFrame. 977278 0. at[df. To get the last element index: dataframe_object. get_loc(df. The Python and NumPy indexing operators [] and attribute operator . query("two > 5") And get_level_values. 710 20070630 7. iloc[[4]] since the first row is at index 0, the second row is at index 1, and so on. tolist()[0]) Making the first (or n-th) row the index: df. I want to get the ordinal number of the row fulfilling ('b' == 5), which in this case would be 1. 240893 1. "the ordinal position of the index value") of a DataFrame row without adding an extra row that contains the row number (the index can be arbitrary, i. wzeyxg gaq wlxq kxwg cvfv bdgm baif fhjsm mznkfz amdsc