# Python – Filter Range Length Tuples

• Last Updated : 14 Jan, 2020

Sometimes, while working with records, we might desire to filter records in such a way in which we need to discard records that do not contains exact number of elements required to constitute a record and lie in a range. Let’s discuss certain ways in which this task can be performed.

Method #1 : Using list comprehension + `len()`
In this method, we just iterate through the list and discard the tuples that do not match the matching range length required to constitute the record. The computation of length is done by len().

 `# Python3 code to demonstrate working of``# Filter Range Length Tuples``# Using list comprehension + len()`` ` `# Initializing list``test_list ``=` `[(``4``, ), (``5``, ``6``), (``2``, ``3``, ``5``), (``5``, ``6``, ``8``, ``2``), (``5``, ``9``)]`` ` `# printing original list``print``(``"The original list is : "` `+` `str``(test_list))`` ` `# Initializing desired lengths ``i, j ``=` `2``, ``3`` ` `# Filter Range Length Tuples``# Using list comprehension + len()``res ``=` `[sub ``for` `sub ``in` `test_list ``if` `len``(sub) >``=` `i ``and` `len``(sub) <``=` `j]``     ` `# printing result``print``(``"The tuple list after filtering range records : "` `+` `str``(res))`

Output :

```The original list is : [(4, ), (5, 6), (2, 3, 5), (5, 6, 8, 2), (5, 9)]
The tuple list after filtering range records : [(5, 6), (2, 3, 5), (5, 9)]
```

Method #2 : Using `filter() + lambda + len()`
The combination of above functions can also be used to perform this particular task. In this, we just use filter() and use lambda function to filter range length records.

 `# Python3 code to demonstrate working of``# Filter Range Length Tuples``# Using filter() + lambda + len()`` ` `# Initializing list``test_list ``=` `[(``4``, ), (``5``, ``6``), (``2``, ``3``, ``5``), (``5``, ``6``, ``8``, ``2``), (``5``, ``9``)]`` ` `# printing original list``print``(``"The original list is : "` `+` `str``(test_list))`` ` `# Initializing desired lengths ``i, j ``=` `2``, ``3`` ` `# Filter Range Length Tuples``# Using filter() + lambda + len()``res ``=` `list``(``filter``(``lambda` `ele: ``len``(ele) >``=` `i ``and` `len``(ele) <``=` `j, test_list))``     ` `# printing result``print``(``"The tuple list after filtering range records : "` `+` `str``(res))`

Output :

```The original list is : [(4, ), (5, 6), (2, 3, 5), (5, 6, 8, 2), (5, 9)]
The tuple list after filtering range records : [(5, 6), (2, 3, 5), (5, 9)]
```

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