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- Filter dataframe rows if value in column is in a set list of values
134 isin() is ideal if you have a list of exact matches, but if you have a list of partial matches or substrings to look for, you can filter using the str contains method and regular expressions For example, if we want to return a DataFrame where all of the stock IDs which begin with '600' and then are followed by any three digits:
- how to use pandas isin for multiple columns - Stack Overflow
Instead of MultiIndex, you could opt to use df loc [df isin (filter_to_apply) sum (axis=1) == len (filter_to_apply keys ()), :] Here, filter to apply is a dictionary with column names as key, and dict values a list of values This takes the row-wise sum of the binary result of df isin (filter_to_apply), and ensures that we filter rows for which
- How to filter Pandas dataframe using in and not in like in SQL
97 How to implement 'in' and 'not in' for a pandas DataFrame? Pandas offers two methods: Series isin and DataFrame isin for Series and DataFrames, respectively
- Filter pandas DataFrame by substring criteria - Stack Overflow
How do I select by partial string from a pandas DataFrame? This post is meant for readers who want to search for a substring in a string column (the simplest case) as in df1[df1['col'] str contains(r'foo(?!$)')] search for multiple substrings (similar to isin), e g , with df4[df4['col'] str contains(r'foo|baz')] match a whole word from text (e g , "blue" should match "the sky is blue" but not
- dropping rows from dataframe based on a not in condition
333 You can use pandas Dataframe isin pandas Dateframe isin will return boolean values depending on whether each element is inside the list a or not You then invert this with the ~ to convert True to False and vice versa import pandas as pd a = ['2015-01-01' , '2015-02-01']
- How to select DataFrame columns based on partial matching?
Select column by partial string, can simply be done, via: df filter(like='hello') # select columns which contain the word hello And to select rows by partial string match, you can pass axis=0 to filter: df filter(like='hello', axis=0)
- Delete a column from a Pandas DataFrame - Stack Overflow
To delete a column in a DataFrame, I can successfully use: del df['column_name'] But why can't I use the following? del df column_name Since it is possible to access the Series via df column_name
- How to get a ticker symbol from a company name with the Google Finance . . .
Back when Google Finance first provided a Google Sheets formula, it was this: =GoogleLookup(A1, "ticker") But this no longer works, and Google has been dropping the ball on Finance for quite some time now The REVERSE lookup is possible tho; ie, given the TICKER SYMBOL you can look up the official corporate name (according to GoogleFinance) =GOOGLEFINANCE(B1, "name") Where A1 is the cell in
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