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Tag: spark-dataframe

How to convert OpenDocument spreadsheets to a pandas DataFrame?

January 15, 2021 Jeffrey Schneider

Question or problem about Python programming: The Python library pandas can read Excel spreadsheets and convert them to a pandas.DataFrame with pandas.read_excel(file) command. Under the hood, it uses xlrd library which does not support ods files.

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Python is a powerful general-purpose programming language.

Add new column in Pandas DataFrame Python

January 15, 2021 Abreonia Ng

Question or problem about Python programming: I have dataframe in Pandas for example: Col1 Col2 A 1 B 2 C 3 Now if I would like to add one more column named Col3 and the value is based on Col2. In formula, if Col2 > 1, then Col3 is 0, otherwise would be 1. So, […]

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Putting many python pandas dataframes to one excel worksheet

January 15, 2021 Jeffrey Schneider

Question or problem about Python programming: It is quite easy to add many pandas dataframes into excel work book as long as it is different worksheets. But, it is somewhat tricky to get many dataframes into one worksheet if you want to use pandas built-in df.to_excel functionality.

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Python Programming

Find unique values in a Pandas dataframe, irrespective of row or column location

January 14, 2021January 17, 2021 James Cameron

Question or problem about Python programming: I have a Pandas dataframe and I want to find all the unique values in that dataframe…irrespective of row/columns. If I have a 10 x 10 dataframe, and suppose they have 84 unique values, I need to find them – Not the count.

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Find all columns of dataframe in Pandas whose type is float, or a particular type?

January 13, 2021 Simon Abital

Question or problem about Python programming: I have a dataframe, df, that has some columns of type float64, while the others are of object. Due to the mixed nature, I cannot use

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python pandas dataframe slicing by date conditions

January 13, 2021 James Cameron

Question or problem about Python programming: I am able to read and slice pandas dataframe using python datetime objects, however I am forced to use only existing dates in index. For example, this works:

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How to open and convert sqlite database to pandas dataframe

January 13, 2021 Abreonia Ng

Question or problem about Python programming: I have downloaded some datas as a sqlite database (data.db) and I want to open this database in python and then convert it into pandas dataframe.

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Retrieve top n in each group of a DataFrame in pyspark

January 13, 2021 Abreonia Ng

Question or problem about Python programming: There’s a DataFrame in pyspark with data as below:

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Lambda including if…elif…else

January 12, 2021 Bell Jacquise

Question or problem about Python programming: I want to apply a lambda function to a DataFrame column using if…elif…else within the lambda function.

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Get weekday/day-of-week for Datetime column of DataFrame

January 11, 2021 Jeffrey Schneider

Question or problem about Python programming: I have a DataFrame df like the following (excerpt, ‘Timestamp’ are the index):

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