How to Convert Strings in Nested Tuples to Integers in Python?

Converting Strings in Nested Lists to Integers

Given a tuple of tuples containing strings, such as:

T1 = (('13', '17', '18', '21', '32'),
      ('07', '11', '13', '14', '28'),
      ('01', '05', '06', '08', '15', '16'))

The task is to convert each string element into an integer and store the result in a new list of lists, as shown below:

T2 = [[13, 17, 18, 21, 32],
      [7, 11, 13, 14, 28],
      [1, 5, 6, 8, 15, 16]]

Solution:

Python provides the int() function to convert a string into an integer. To convert all the strings in a list of lists, you can use a list comprehension:

T2 = [list(map(int, x)) for x in T1]

This comprehension iterates over each inner list in T1 and uses the map() function to convert each string element into an integer. The result is a new list of lists.

Note:

For Python 2 compatibility, you can replace map with list inside the comprehension:

T2 = [list(int(y) for y in x) for x in T1]

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