# Python | Find number of lists in a tuple

Given a tuple of lists, the task is to find number of lists in a tuple. This is a very basic problem but can be useful while making some utility application.

Method #1: Using len

 `# Python code to find number of list in a tuple ` ` `  `# Initial list  ` `Input1 ``=` `([``1``, ``2``, ``3``, ``4``], [``5``, ``6``, ``7``, ``8``]) ` `Input2 ``=` `([``1``, ``2``], [``3``, ``4``], [``5``, ``6``]) ` `Input3 ``=` `([``9``, ``8``, ``7``, ``6``, ``5``, ``4``, ``3``, ``2``, ``1``], [``1``, ``2``, ``3``]) ` ` `  `# Using len to find no of list in tuple ` `Output1 ``=` `len``(Input1) ` `Output2 ``=` `len``(Input2) ` `Output3 ``=` `len``(Input3) ` ` `  `# Printing ` `print``(``"Initial list :"``) ` `print``(Input1) ` `print``(``"No of list in tuples are :"``) ` `print``(Output1) ` `print``(``"\n"``) ` ` `  `print``(``"Initial list :"``) ` `print``(Input2) ` `print``(``"No of list in tuples are :"``) ` `print``(Output2) ` `print``(``"\n"``) ` ` `  ` `  `print``(``"Initial list :"``) ` `print``(Input3) ` `print``(``"No of list in tuples are :"``) ` `print``(Output3) ` `print``(``"\n"``) `

Output:

```Initial list :
([1, 2, 3, 4], [5, 6, 7, 8])
No of list in tuples are :
2

Initial list :
([1, 2], [3, 4], [5, 6])
No of list in tuples are :
3

Initial list :
([9, 8, 7, 6, 5, 4, 3, 2, 1], [1, 2, 3])
No of list in tuples are :
2
```

Method #2: Using function and isinstance

 `# Python code to find number of list in a tuple ` ` `  `# Using find function ` `def` `find(``Input``): ` `    ``if` `isinstance``(``Input``, ``list``): ` `        ``return` `1` `    ``else``: ` `        ``return` `len``(``Input``) ` ` `  `# List initialization ` `Input1 ``=` `([``1``, ``2``, ``3``, ``4``], [``5``, ``6``, ``7``, ``8``]) ` `Input2 ``=` `([``1``, ``2``], [``3``, ``4``], [``5``, ``6``]) ` `Input3 ``=` `([``9``, ``8``, ``7``, ``6``, ``5``, ``4``, ``3``, ``2``, ``1``]) ` ` `  `# using find ` `Output1 ``=` `find(Input1) ` `Output2 ``=` `find(Input2) ` `Output3 ``=` `find(Input3) ` ` `  `# printing ` `print``(``"Initial list :"``) ` `print``(Input1) ` `print``(``"No of list in tuples are :"``) ` `print``(Output1) ` `print``(``"\n"``) ` ` `  `print``(``"Initial list :"``) ` `print``(Input2) ` `print``(``"No of list in tuples are :"``) ` `print``(Output2) ` `print``(``"\n"``) ` ` `  ` `  `print``(``"Initial list :"``) ` `print``(Input3) ` `print``(``"No of list in tuples are :"``) ` `print``(Output3) ` `print``(``"\n"``) `

Output:

```Initial list :
([1, 2, 3, 4], [5, 6, 7, 8])
No of list in tuples are :
2

Initial list :
([1, 2], [3, 4], [5, 6])
No of list in tuples are :
3

Initial list :
[9, 8, 7, 6, 5, 4, 3, 2, 1]
No of list in tuples are :
1
```

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