[python] pandas: best way to select all columns whose names start with X

You can try the regex here to filter out the columns starting with "foo"

df.filter(regex='^foo*')

If you need to have the string foo in your column then

df.filter(regex='foo*')

would be appropriate.

For the next step, you can use

df[df.filter(regex='^foo*').values==1]

to filter out the rows where one of the values of 'foo*' column is 1.

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