List comprehension on a nested list?

Here is how you would do this with a nested list comprehension:

[[float(y) for y in x] for x in l]

This would give you a list of lists, similar to what you started with except with floats instead of strings. If you want one flat list then you would use [float(y) for x in l for y in x].

Related Posts:

  1. if else in a list comprehension
  2. if else in a list comprehension
  3. How to find all occurrences of an element in a list
  4. How can I reverse a list in Python?
  5. Python – TypeError: ‘int’ object is not iterable
  6. TypeError: list indices must be integers or slices, not str
  7. IndexError: list index out of range and python
  8. Python – TypeError: ‘int’ object is not iterable
  9. Finding the index of an item in a list
  10. Finding the index of an item in a list
  11. Accessing the index in ‘for’ loops?
  12. What does the list() function do in Python?
  13. List changes unexpectedly after assignment. Why is this and how can I prevent it?
  14. Why does this iterative list-growing code give IndexError: list assignment index out of range?
  15. TypeError: ‘float’ object is not subscriptable
  16. Is there a short contains function for lists?
  17. appending list but error ‘NoneType’ object has no attribute ‘append’
  18. Check if something is (not) in a list in Python
  19. Python: finding an element in a list [duplicate]
  20. How to avoid “RuntimeError: dictionary changed size during iteration” error?
  21. Writing a list to a file with Python
  22. How do I concatenate two lists in Python?
  23. How can I randomly select an item from a list?
  24. Fastest way to check if a value exists in a list
  25. How can I count the occurrences of a list item?
  26. TypeError: ‘list’ object cannot be interpreted as an integer
  27. Finding median of list in Python
  28. Get list from pandas dataframe column or row?
  29. Finding and replacing elements in a list
  30. How to find all the indexes of a recurring item in a list?
  31. ValueError: max() arg is an empty sequence
  32. Remove list from list in Python
  33. python – if not in list
  34. How can I compare two lists in python and return matches
  35. Append integer to beginning of list in Python
  36. Union of two lists in Python
  37. Python: Array v. List
  38. Get unique values from a list in python
  39. ‘list’ object has no attribute ‘shape’
  40. How do I check if a list is empty?
  41. Python: Get the first character of the first string in a list?
  43. How do I find the duplicates in a list and create another list with them?
  44. What’s the idiomatic syntax for prepending to a short python list?
  45. TypeError: unsupported operand type(s) for -: ‘list’ and ‘list’
  46. Remove all occurrences of a value from a list?
  47. Converting Dictionary to List?
  48. Python Sets vs Lists
  49. AttributeError: ‘list’ object has no attribute ‘replace’ when trying to remove character
  50. How to deep copy a list?
  51. Python return list from function
  52. How to check if a string is a substring of items in a list of strings?
  53. Whats the difference between ‘for x in list:’ and ‘for x in list[:]:’
  54. Removing Punctuation From Python List Items
  55. How can I compare two lists in python and return matches
  56. How do I check if a list is empty?
  57. IndexError: list index out of range and python
  58. Pop index out of range
  59. Print list without brackets in a single row
  60. How to append multiple values to a list in Python
  61. How to iterate through two lists in parallel?
  62. How to remove \n from a list element?
  63. Creating a dictionary from a csv file?
  64. How to read a text file into a list or an array with Python
  65. Map to List error: Series object not callable
  66. how to create a list of lists
  67. Python assigning multiple variables to same value? list behavior
  68. How do I check if there are duplicates in a flat list?
  69. How can I create an array/list of dictionaries in python?
  70. How to sort a list/tuple of lists/tuples by the element at a given index?
  71. Append a tuple to a list – what’s the difference between two ways?
  72. Defining lists as global variables in Python
  73. How can I remove all instances of an element from a list in Python?
  74. Create an empty list in Python with certain size
  75. How to multiply all integers inside list
  76. How to concatenate items in a list to a single string?
  77. What’s the difference between lists enclosed by square brackets and parentheses in Python?
  78. Why is there no tuple comprehension in Python?
  79. Python 2: AttributeError: ‘list’ object has no attribute ‘strip’
  80. How to make a set of lists
  81. Appending to a list gives ‘int’ object has no attribute ‘append’
  82. Python data structure sort list alphabetically
  83. TypeError: unsupported format string passed to list.__format__
  84. How to remove square brackets from list in Python?
  85. TypeError: only integer arrays with one element can be converted to an index 3
  86. How to create a numpy array of lists?
  87. Inline for loop
  88. Element-wise addition of 2 lists?
  89. creating a reverse method for a python list from scratch
  90. Is it possible to use ‘else’ in a list comprehension?
  91. How to create a list of objects?
  92. Python cant convert ‘list’ object to str error [closed]
  93. In Python, is there an elegant way to print a list in a custom format without explicit looping?
  94. Circular list iterator in Python
  95. How is Python’s List Implemented?
  96. Determine if 2 lists have the same elements, regardless of order? [duplicate]
  97. Building a list inside a list in python
  98. Writing Python lists to columns in csv
  99. Python initializing a list of lists
  100. Does Python have an immutable list?

Leave a Comment