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Pandas
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2024-03-12 06:30:04
Python - Polars replacing the first n rows with certain values?
You can use DataFrame.with_row_index(): import polars as pl df = pl.DataFrame({"test": np.arange(1, 11)}) print( df.with_row_index() .with_columns( pl.when(pl.col("index") < 5)...
Tags: python,  pandas,  dataframe
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2024-03-12 14:00:05
Python - file with quotes in any of the fields to be retained as is in pandas?
Add parameter quoting to pd.read_csv and to df.to_csv with 3 (QUOTE_NONE): # Load CSV data into dataframes df = pd.read_csv(StringIO(csv_data), header=0, dtype=str,...
Tags: python,  pandas
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2024-03-12 16:00:06
Replacing < containing values in Python dataframe?
df[df["Column"].str.contains("
Tags: python,  pandas,  dataframe
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2024-03-12 17:00:06
Python - how to import time duration data from Excel when duration is more than 24 hours?
If you have datetime/time objects in Excel, the easiest might be to import as string, add the reference date when missing, convert to_datetime and subtract the reference: df = pd.read_excel('data.xlsx...
Tags: python,  pandas,  excel
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2024-03-12 20:00:06
Python - Unstack only the last three columns?
You could melt with ignore_index=False, then set the new variable column as index with set_index append=True: out = (data.melt(data.columns[:-3], ignore_index=False, var_name='tail') .set_i...
Tags: python,  pandas,  multi-index
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2024-03-12 20:30:04
How create a list with only the months that have complete days in Python?
You can achieve it by checking if the number of days in the month is equal to the total number of hours in that month. If they are equal, it means that the month is completed. By comparing the length...
Tags: python,  pandas
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2024-03-12 21:00:10
Python - How to select rows based on a specified set of values in one column which share a value in another column with pandas?
Try this: In this solution, groupby() will return a series, with the values in A as sets, with the values of B as the index. We then check to see if each set is equal to the target set. Lastly we map...
Tags: python,  pandas
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2024-03-12 22:30:08
Python - How to iterate a list from a to z - to scrape data and transform it into dataframe?
First check whether the elements you want to select are contained in response / soup; the ones you are addressing do not appear to be present. So your ResultSet soup.find_all('a', class_='entry-title'...
Tags: python,  pandas,  web-scraping
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2024-03-13 00:00:06
Python - Merge corresponding values from column 2 into column 1 (pandas)?
You can melt and post-process the columns: out = (df .melt('ID', ignore_index=False) .assign(ID=lambda d: d['ID'].mask(d['variable'].eq('Value2'), 'Value2')) .sort_index().drop(columns='varia...
Tags: python,  pandas,  dataframe
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2024-03-13 00:00:07
Pandas - Dynamic Query for Dataframe with multiple conditions and types?
Assuming rule_df the rules DataFrame and df the data one: # first ensure the correct column names are used # and that dates are in a YYYY-MM-DD format tmp = (df.rename(columns={'Height(in)': 'Height'}...
Tags: pandas,  dataframe,  dynamic
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