The Pandas dataframe drop () method takes single or list label names and delete corresponding rows and columns.The axis = 0 is for rows and axis =1 is for columns. df = df.loc[~( (df ['col1'] == 'A') & (df ['col2'] > 6))] This particular example will drop any rows where the value in col1 is equal to A and the value in col2 is greater than 6. How to Drop Rows that Contain a Specific Value in Pandas, How to Drop Rows that Contain a Specific String in Pandas, Pandas: Use Groupby to Calculate Mean and Not Ignore NaNs. Let's see the approach of drop rows based on multiple conditions in the next section. This operator is used to check whether the given value is present in the list or not, Syntax: dataframe[dataframe.column_name.isin(list_of_values) == False]. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Statology is a site that makes learning statistics easy by explaining topics in simple and straightforward ways. The Pandas library provides us with a useful function called drop which we can utilize to get rid of the unwanted columns and/or rows in our data. Different methods to drop rows in pandas DataFrame Create pandas DataFrame with example data Method 1 - Drop a single Row in DataFrame by Row Index Label Example 1: Drop last row in the pandas.DataFrame Example 2: Drop nth row in the pandas.DataFrame Method 2 - Drop multiple Rows in DataFrame by Row Index Label However, in this post we are going to discuss several approaches on how to drop rows from the dataframe based on certain condition applied on a column. A Computer Science portal for geeks. 1. When condition expression satisfies it returns True which actually removes the rows.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'sparkbyexamples_com-medrectangle-4','ezslot_6',109,'0','0'])};__ez_fad_position('div-gpt-ad-sparkbyexamples_com-medrectangle-4-0');if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'sparkbyexamples_com-medrectangle-4','ezslot_7',109,'0','1'])};__ez_fad_position('div-gpt-ad-sparkbyexamples_com-medrectangle-4-0_1'); .medrectangle-4-multi-109{border:none !important;display:block !important;float:none !important;line-height:0px;margin-bottom:7px !important;margin-left:auto !important;margin-right:auto !important;margin-top:7px !important;max-width:100% !important;min-height:250px;padding:0;text-align:center !important;}. syntax: dataframe.dropduplicates () python3 import pyspark from pyspark.sql import sparksession spark = sparksess Creating Dataframe to drop rows In this Dataframe, currently, we are having 458 rows and 9 columns. For this particular DataFrame, three of the rows were dropped. Determine if rows or columns which contain missing values are removed. Your email address will not be published. Considering certain columns is optional. Dot product of vector with camera's local positive x-axis? drop() will drops the rows by the index number. Both functions give the same output. Drop all rows where score of the student is less than 80 df = df[df['Score'] > 80] Here, we filtered the rows by integer value of 80 and above, other rows have been dropped. import pandas as pd record = { 'Name': ['Ankit', 'Amit', 'Aishwarya', 'Priyanka', 'Priya', 'Shaurya' ], 'Age': [21, 19, 20, 18, 17, 21], How to Drop Rows by Index in Pandas, Your email address will not be published. acknowledge that you have read and understood our, Data Structure & Algorithm Classes (Live), Data Structure & Algorithm-Self Paced(C++/JAVA), Android App Development with Kotlin(Live), Full Stack Development with React & Node JS(Live), GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam. Syntax: dataframe[dataframe.column_name operator value], By using this method we can drop multiple values present in the list, we are using isin() operator. 20 Pandas Functions for 80% of your Data Science Tasks Susan Maina in Towards Data Science Regular Expressions (Regex) with Examples in Python and Pandas Ahmed Besbes in Towards Data Science 12 Python Decorators To Take Your Code To The Next Level Tomer Gabay in Towards Data Science 5 Python Tricks That Distinguish Senior Developers From Juniors A Computer Science portal for geeks. "Least Astonishment" and the Mutable Default Argument, How to drop rows of Pandas DataFrame whose value in a certain column is NaN. How can I explain to my manager that a project he wishes to undertake cannot be performed by the team? In this, we drop rows by giving the function a range. See the below code example: Why does Jesus turn to the Father to forgive in Luke 23:34? We can use this method to drop such rows that do not satisfy the given conditions. Find centralized, trusted content and collaborate around the technologies you use most. Strange behavior of tikz-cd with remember picture. Drop Rows: Multiple Conditions. The method is to find the true values in each row, such as all values in column A equal to foo. Use the ILOC method to find data based on the index position. the rows of the original DataFrame): #pop the row in index position 3 df.T.pop(3) pandas dropna specific column. Any row less than 80 is dropped. We will be following these steps in this article to drop rows in a dataframe based on conditions. In order to use the pop () function to remove rows, you must first transpose the DataFrame and then use the pop () function to remove the columns (i.e. Applications of super-mathematics to non-super mathematics. Alternatively, you can also achieve dropping rows by filtering rows and assigning them to another DataFrame.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[320,50],'sparkbyexamples_com-box-3','ezslot_4',105,'0','0'])};__ez_fad_position('div-gpt-ad-sparkbyexamples_com-box-3-0');if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[320,50],'sparkbyexamples_com-box-3','ezslot_5',105,'0','1'])};__ez_fad_position('div-gpt-ad-sparkbyexamples_com-box-3-0_1'); .box-3-multi-105{border:none !important;display:block !important;float:none !important;line-height:0px;margin-bottom:7px !important;margin-left:auto !important;margin-right:auto !important;margin-top:7px !important;max-width:100% !important;min-height:50px;padding:0;text-align:center !important;}. Only consider certain columns for identifying duplicates, by default use all of the columns. hello I need help to drop some rows by the condition: if the estimated price minus price is more than 1500 (positive) drop the row. Manage Settings Your email address will not be published. python. Are there conventions to indicate a new item in a list? Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? python, Categories: Drop Rows with Conditions in Pandas The Josh name from the Dataframe is dropped based on the condition that if df ['Names'] == 'Josh'], then drop that row. We will explore dropna() in this section. Example1: Drop Rows Based on Multiple Conditions [code]df = df[ (df . This particular example will drop any rows where the value in col1 is equal to A or the value in col2 is greater than 6. pandas, The default axis is set at 0 that is, the rows. This method works as the examples shown above, where you can either: Pass in a list of columns into the labels= argument and use index=1. Example 3 : Delete rows based on multiple conditions on different columns. A list or array of labels, e.g. How to drop rows in Pandas DataFrame by index labels? Continue with Recommended Cookies. Let's use this do delete multiple rows by conditions. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Report_Card = pd.read_csv ("Grades.csv") Report_Card.drop ("Retake",axis=1,inplace=True) In the above example, we provided the following arguments to the drop function: 5 ways to apply an IF condition in Pandas DataFrame June 25, 2022 In this guide, you'll see 5 different ways to apply an IF condition in Pandas DataFrame. 1. Learn more about us. index, inplace = True) print( df) Yields below output. In this post we will see how to plot multiple sub-plots in the same figure. Drop all rows where score of the student is less than 80 df = df[df['Score'] > 80] Here, we filtered the rows by integer value of 80 and above, other rows have been dropped. Is there a proper earth ground point in this switch box? Drop NA rows or missing rows in pandas python. Save my name, email, and website in this browser for the next time I comment. as in example? Return DataFrame with duplicate rows removed. Dropping rows means removing values from the dataframe we can drop the specific value by using conditional or relational operators. If otherwise, boolean indexing is the better solution. How do I select rows from a DataFrame based on column values? RECOMMENDED ARTICLES how to drop rows or columns based on their labels. You can use the following syntax to drop rows in a pandas DataFrame that contain any value in a certain list: #define values values = [value1, value2, value3, .] Lets see example of each. all : If all values are NA, drop that row or column. A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. Syntax dataframe .drop ( labels, axis, index, columns, level, inplace., errors) drop () method is also used to delete rows from DataFrame based on column values (condition). You need, delete some rows from a dataframe according to conditions [duplicate], Multi index dataframe delete row with maximum value per group, The open-source game engine youve been waiting for: Godot (Ep. And for each review, I have the different words with a specific score as below: I need to delete the lines that present the max score for each review. The consent submitted will only be used for data processing originating from this website. Example 2 : Delete rows based on multiple conditions on a column. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Note that we can also use the | operator to apply an or filter: The only rows that we kept in the DataFrame were the ones where the assists value was greater than 8 or the rebounds value was greater than 10. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. For this particular DataFrame, six of the rows were dropped. Drop rows from Pandas dataframe with missing values or NaN in columns. Pandas drop() function. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? Count rows based on condition in Pyspark Dataframe, Python | Creating a Pandas dataframe column based on a given condition. How to react to a students panic attack in an oral exam? Sorted by: 1. pandas offer negation (~) operation to perform this feature. To drop rows by conditions in a list we have to use isin(). Allowed inputs are: A single label, e.g. Our DataFrame contains column names Courses, Fee, Duration, and Discount.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[320,50],'sparkbyexamples_com-medrectangle-3','ezslot_1',107,'0','0'])};__ez_fad_position('div-gpt-ad-sparkbyexamples_com-medrectangle-3-0');if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[320,50],'sparkbyexamples_com-medrectangle-3','ezslot_2',107,'0','1'])};__ez_fad_position('div-gpt-ad-sparkbyexamples_com-medrectangle-3-0_1'); .medrectangle-3-multi-107{border:none !important;display:block !important;float:none !important;line-height:0px;margin-bottom:7px !important;margin-left:auto !important;margin-right:auto !important;margin-top:7px !important;max-width:100% !important;min-height:50px;padding:0;text-align:center !important;}, drop() method takes several params that help you to delete rows from DataFrame by checking condition. for documentation on drop() function kindly refer here. Drop is a major function used in data science & Machine Learning to clean the dataset. df. Does Python have a ternary conditional operator? Get started with our course today. pandas merge columns with same name. We can drop specific values from multiple columns by using relational operators. It drops all the rows mentioned in the index range. Why does the impeller of a torque converter sit behind the turbine? Pandas: Use Groupby to Calculate Mean and Not Ignore NaNs. Example 1 has shown how to use a logical condition specifying the rows that we want to keep in our data set. When condition expression satisfies it returns True which actually removes the rows. You can use the pop () function to quickly remove a column from a pandas DataFrame. Drop a list of rows from a Pandas DataFrame. Not the answer you're looking for? Different ways to conditional Drop Row in Pandas. The Pandas drop() function in Python is used to drop specified labels from rows and columns. Introduction to Statistics is our premier online video course that teaches you all of the topics covered in introductory statistics. When using a multi-index, labels on different levels can be removed by specifying the level. A Computer Science portal for geeks. Parameters: thresh: int, optional Lets use the vectorization operation to filter out all those rows which satisfy the given condition. What capacitance values do you recommend for decoupling capacitors in battery-powered circuits? Note: Th & symbol represents AND logic in pandas. Additionally, we will also discuss on how to drop by index, by condi. Pandas how to find column contains a certain value Recommended way to install multiple Python versions on Ubuntu 20.04 Build super fast web scraper with Python x100 than BeautifulSoup How to convert a SQL query result to a Pandas DataFrame in Python How to write a Pandas DataFrame to a .csv file in Python Here, we filtered the rows by integer value of 80 and above, other rows have been dropped. How to Drop Rows that Contain a Specific String in Pandas Tags: pandas divide two columns. Dropping a row in pandas is achieved by using .drop() function. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. dropna() has how parameter and the default is set to any. pandas drop duplicates multiple columns. A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, I realized that, I changed the duplicate. In this we will use multiple conditions to drop specific rows. This particular example will drop any rows where the value in col1 is equal to A, The following code shows how to drop rows in the DataFrame where the value in the, #drop rows where value in team column == 'A' or value in assists column > 6, #drop rows where value in team column == 'A' and value in assists column > 6, Pandas: How to Convert Date to YYYYMMDD Format, Pandas: Formula for If Value in Column Then. Note that this method assumes that your index is unique. Let's say we want to drop those student's rows whose number is less than 40 either in Math or in English. Has China expressed the desire to claim Outer Manchuria recently? For E.x: df.drop(df1,inplace=True). is there a chinese version of ex. Note that these methods actually filter the rows from pandas DataFrame, by negating this you can drop the rows. for example only the index 1 would be drop any : If any NA values are present, drop that row or column. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. thanks for the tip, please continue pointing these things out. To download the CSV (nba.csv dataset) used in the code, click here. pandas concat two columns. All Rights Reserved. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. It drops all the NaN values from the dataframe/data based on conditions and axis. By specifying the row axis ( axis='index' ), the drop () method removes the specified row. The other value is all. This is how it is done. axis: {0 or index, 1 or columns}, default 0 Pass in a list of columns into the columns= argument. Statology Study is the ultimate online statistics study guide that helps you study and practice all of the core concepts taught in any elementary statistics course and makes your life so much easier as a student. Your email address will not be published. Yes it only works with unique index. Do EMC test houses typically accept copper foil in EUT? This is how our school dataframe looks like: We will see how to drop rows with conditions in this section. Use a list of values to select rows from a Pandas dataframe, How to drop rows of Pandas DataFrame whose value in a certain column is NaN, How to iterate over rows in a DataFrame in Pandas. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. By using our site, you To get the count rows with a single condition and multiple conditions in pandas DataFrame using either shape(), len(), df.index, and apply() with lambda functions. Drop rows by condition in Pandas dataframe. Both output with index[1] row dropped. Pandas Convert Single or All Columns To String Type? How to Drop Rows that Contain a Specific String in Pandas .loc [] is primarily label based, but may also be used with a boolean array. When how = 'all' it drops rows and columns which has all the NaN values across the dataframe. How to get the closed form solution from DSolve[]? I have seen examples where conditions are applied individually on column values but did not find anything where a row is deleted based on a condition applied on multiple columns. Like the previous example, we can drop rows based on multiple conditions. This particular example will drop any rows where the value in col1 is equal to A and the value in col2 is greater than 6. Drop rows by index / position in pandas. Definition and Usage The drop () method removes the specified row or column. By default axis = 0 meaning to delete rows. Rows with the list of Grades have been dropped. drop ( df [ df ['Fee'] >= 24000]. how{'any', 'all'}, default 'any' In this article, you have learned how to drop/delete/remove pandas DataFrame rows with single and multiple conditions by using examples. Method 2: Drop Rows that Meet Several Conditions. In this post, we are going to discuss several approaches on how to drop rows from the Dataframe based on certain conditions applied to a column. I assumed that though, based on the sample data we have above. Rows with 12th Grade Math major with the Score greater than 40 have been dropped. Retain all those rows for which the applied condition on the given column evaluates to True. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. pandas - How to drop a row based on a condition in pandas with string converted to integer for comparison Pandas / - How to filter/drop row based on subquery condition within Pandas - - pandas - drop row . Note: The | symbol represents OR logic in pandas. Note: We can also use the drop() function to drop rows from a DataFrame, but this function has been shown to be much slower than just assigning the DataFrame to a filtered version of itself. Method 1: Drop Rows Based on One Condition df = df [df.col1 > 8] Method 2: Drop Rows Based on Multiple Conditions df = df [ (df.col1 > 8) & (df.col2 != 'A')] Note: We can also use the drop () function to drop rows from a DataFrame, but this function has been shown to be much slower than just assigning the DataFrame to a filtered version of itself. Dropping the second and third row of a dataframe is achieved as follows, The above code will drop the second and third row. Delete rows and columns from a DataFrame using Pandas drop () | by B. Chen | Towards Data Science 500 Apologies, but something went wrong on our end. We and our partners use cookies to Store and/or access information on a device. Syntax: dataframe [dataframe.column_name operator value] where Using df.drop(df.index[1]) removes all rows with the same label as the second row. Get started with our course today. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. If need remove first maximum values per groups use: df1 = df.drop (df.groupby ('review_num',sort=False) ['score'].idxmax ()) print (df1) review_num review token_num token score 0 2 The second review 1 The 0.3 1 2 The second review 2 second -0.6 3 1 This is the first review 1 This 0.5 4 1 This is the first review 2 is 0.6 . On different levels can be removed by specifying the level by default use all of the.... Are there conventions to indicate a new item in a list of columns into the columns= argument remove a.! Across the DataFrame rows with conditions in the code, click here expression satisfies returns... Data science & amp ; Machine Learning to clean the dataset what capacitance values do recommend! Dataframe is achieved as follows, the above code will drop the second and third row any. Na values are present, drop that row or column that though, based on.!, based on conditions and axis or NaN in columns rows means removing values from DataFrame!, we drop rows based on a device capacitors in battery-powered circuits row! [ ] to forgive in Luke 23:34 wishes to undertake can not be performed by index... What capacitance values do you recommend for decoupling capacitors in battery-powered circuits the Father forgive. Columns which has all the rows were dropped use this do Delete multiple rows by the! Machine Learning to clean the dataset contributions licensed under CC BY-SA all columns to String?. Data for Personalised ads and content, ad and content, ad and measurement... Follow a government line be used for data processing originating from this website [... Six of the rows pandas: use Groupby to Calculate Mean and not Ignore NaNs a major function in! Below code example: Why does Jesus turn to the Father to forgive in Luke 23:34 axis 0! The CSV ( nba.csv dataset ) used in the next section the desire claim. All of the topics covered in introductory Statistics if any NA values are present, drop that row column... Levels can be removed by specifying the level the desire to claim Outer Manchuria recently, e.g ) below... Giving the function a range to the Father to forgive in Luke 23:34 True which actually removes the row... True which actually removes the rows by the team are: a single label, e.g do German decide... With the Score greater than 40 have been dropped in pandas Python decoupling capacitors in circuits! Well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions original! Nan in columns Groupby to Calculate Mean and not Ignore NaNs specified row column! Wishes to undertake can not be performed by the index 1 would be drop:... In column a equal to foo pandas offer negation ( ~ ) operation to filter all... A new item in a list DataFrame looks like: we will see to! Though, based on the given column evaluates to True behind the turbine inplace=True.! Content measurement, audience insights and product development that these methods actually filter the rows dropped! By index, 1 or columns }, default 0 Pass in DataFrame! Ground point in this we will also discuss on how to vote in EU or! Inplace = True ) print ( df which actually removes the specified row or.... In each row, such as all values are NA, drop that row column.: Delete rows based on multiple conditions different levels can be removed by specifying the.... Be removed by specifying the rows from a DataFrame based on multiple conditions on different can! Inplace=True ) ( ~ ) operation to perform this feature thresh: int, optional use. A new item in a list we have to follow a government line values from the we. Using relational operators function to quickly remove a column from a pandas DataFrame column based on in. This post we will be following these steps in this switch box,! Conditions on a given condition rows which satisfy the given condition not satisfy the given evaluates! Quickly remove a column from a pandas DataFrame with missing values or NaN columns. Rows means removing values from the dataframe/data based on multiple conditions on a device a row index! Time I comment contains pandas drop rows with condition written, well thought and well explained computer science and articles. Default axis = 0 meaning to Delete rows based on conditions let & x27!: Why does the impeller of a torque converter sit behind the turbine is... Pop the row in index position 3 df.T.pop ( 3 ) pandas dropna specific column a major function in! Use the ILOC method to drop rows from a DataFrame based on column values in the figure. If rows or columns which contain missing values are removed, ad and content, ad and content, and. Rows mentioned in the code, click here thresh: int, Lets! To find data based on column values and programming articles, quizzes and practice/competitive programming/company interview Questions will use conditions! The original DataFrame ): # pop the row in index position 3 df.T.pop ( 3 pandas... The dataset will use multiple conditions retain all those rows which satisfy the given condition accept copper in... Default axis = 0 meaning to Delete rows based on multiple conditions on a given condition that... Ad and content measurement, audience insights and product development computer science and programming,... Like the previous example, we use cookies to Store and/or access information on a given condition,. Set to any in a list of Grades have been dropped Jesus turn to Father... To foo pandas Tags: pandas divide two columns 9th Floor, Corporate. Mentioned in the next section axis: { 0 or index, by default use all the. List of rows from a DataFrame is achieved as follows, the above code will drop the rows do. [ df [ ( df [ ( df ) Yields below output column to! ) in this browser for the next time I comment these steps in this post we explore. Major with the list of Grades have been dropped all columns to String Type row or column equal foo... Used for data pandas drop rows with condition originating from this website row of a DataFrame is achieved using. Index range default use all of the topics covered in introductory Statistics, ad and content measurement, insights! Column based on multiple conditions in this section such as all values are,! Do Delete multiple rows by the index number sample data we have above converter sit behind the turbine code... Usage the drop ( ) will drops the rows that we want to pandas drop rows with condition in data... [ code ] df = df [ ( df ) Yields below output a list submitted will only be for. ): # pop the row in pandas CSV ( nba.csv dataset ) used in the next section using... To claim Outer Manchuria recently into the columns= argument ) print ( df Yields! Multiple rows by conditions this method to find data based on condition in Pyspark DataFrame six. Note: the | symbol represents and logic in pandas labels from and! When condition expression satisfies it returns True which actually removes the rows as all in. Condition specifying the level, and website in this post we will dropna! Outer Manchuria recently method removes the rows from a pandas DataFrame column based column! Stack Exchange Inc ; user contributions licensed under CC BY-SA index range would... Filter out all those rows for which the applied condition on the sample data we have use... I select rows from pandas DataFrame or column have above written, well thought and well explained computer and! The ILOC method to find data based on multiple conditions [ code ] df = df [ & # ;. | symbol represents and logic in pandas is achieved by using relational operators applied condition on index... Machine Learning to clean the dataset he wishes to undertake can not be published means removing values from the based! Negation ( ~ ) operation to perform this feature data science & amp ; Machine Learning to clean dataset... [ ( df [ ( df this do Delete multiple rows by the index number rows based a... Contain a specific String in pandas a proper earth ground point in this article to rows. Indexing is the better solution print ( df use Groupby to Calculate and! [ & # x27 ; s see the approach of drop rows from a pandas DataFrame and row... Which contain missing values are removed ; user contributions licensed under CC BY-SA value by using or! 1 or columns which contain missing values are removed the next time I comment dropping rows means values! To plot multiple sub-plots in the code, click here ) Yields below output on in. You use most Luke 23:34 has shown how to drop such rows that Meet Several conditions ) print ( ). Why does Jesus turn to the Father to forgive in Luke 23:34 code, click here and not pandas drop rows with condition.. Eu decisions or do they have to use isin ( ) used for data originating... Programming articles, quizzes and practice/competitive programming/company interview Questions and the default is set to any is.! Personalised ads and content measurement, audience insights and product development by using.drop ). Or column Exchange Inc ; user contributions licensed under CC BY-SA click here react to a students panic attack an. Nan values across the DataFrame Grades have been dropped the specified row or column or relational operators satisfy... We and our partners use cookies to ensure you have the best experience! To Store and/or access information on a device DataFrame ): # pop the row in pandas:! To forgive in Luke 23:34 ) will drops the rows mentioned in the next I... With index [ 1 ] row dropped technologies you use most relational operators of drop rows in DataFrame!
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pandas drop rows with condition