Python Result Of Filter. The filter function in Python is used to fetch some selected elements from a iterable using certain conditions. Suppose that you have a Pandas DataFrame that contains columns with limited number of entries.
We first create a boolean variable by taking the column of interest and checking if its value equals to the specific value that we want to selectkeep. So in order to get a list back you have to use list class. One way to filter by rows in Pandas is to use boolean expression.
In simple words it filters the ones that dont pass the test and returns the rest as a filter object.
An iterable is a Python object that can be iterated over that is it will return items in a sequence such that we can use it in a for loop. Filtering rows of a DataFrame is an almost mandatory task for Data Analysis with Python. Python filter function applies another function on a given iterable ListStringDictionary etc to test which of its item to keep or discard. The filter object is of the iterable type.