How to read a text file into a list or an array with Python

You will have to split your string into a list of values using split()

So,

lines = text_file.read().split(',')

EDIT: I didn’t realise there would be so much traction to this. Here’s a more idiomatic approach.

import csv
with open('filename.csv', 'r') as fd:
    reader = csv.reader(fd)
    for row in reader:
        # do something

Related Posts:

  1. TypeError: list indices must be integers or slices, not str
  2. Python List vs. Array – when to use?
  3. Python: Array v. List
  4. TypeError: list indices must be integers or slices, not str
  5. How can I create an array/list of dictionaries in python?
  6. numpy-equivalent of list.pop?
  7. TypeError: only integer arrays with one element can be converted to an index 3
  8. How to create a numpy array of lists?
  9. How is Python’s List Implemented?
  10. Python – TypeError: ‘int’ object is not iterable
  11. IndexError: list index out of range and python
  12. Python – TypeError: ‘int’ object is not iterable
  13. ValueError: setting an array element with a sequence
  14. Finding the index of an item in a list
  15. Accessing the index in ‘for’ loops?
  16. What does the list() function do in Python?
  17. Numpy ValueError: setting an array element with a sequence. This message may appear without the existing of a sequence?
  18. Is there a short contains function for lists?
  19. ValueError: operands could not be broadcast together with shapes (5,) (30,)
  20. appending list but error ‘NoneType’ object has no attribute ‘append’
  21. Check if something is (not) in a list in Python
  22. How to avoid “RuntimeError: dictionary changed size during iteration” error?
  23. Writing a list to a file with Python
  24. How do I concatenate two lists in Python?
  25. How can I randomly select an item from a list?
  26. Convert pandas dataframe to NumPy array
  27. Fastest way to check if a value exists in a list
  28. How can I count the occurrences of a list item?
  29. TypeError: ‘list’ object cannot be interpreted as an integer
  30. size of NumPy array
  31. Get list from pandas dataframe column or row?
  32. Finding and replacing elements in a list
  33. How to find list intersection?
  34. ValueError: max() arg is an empty sequence
  35. Using Numpy Vectorize on Functions that Return Vectors
  36. Remove list from list in Python
  37. How can I compare two lists in python and return matches
  38. Is arr.__len__() the preferred way to get the length of an array in Python?
  39. Append integer to beginning of list in Python
  40. List comprehension on a nested list?
  41. Union of two lists in Python
  42. initialize a numpy array
  43. How do I check if a list is empty?
  44. How to access the ith column of a NumPy multidimensional array?
  45. Dump a NumPy array into a csv file
  46. Python: find position of element in array
  47. What’s the idiomatic syntax for prepending to a short python list?
  48. numpy with python: convert 3d array to 2d
  49. Create 3D array using Python
  50. Python: slicing a multi-dimensional array
  51. Shuffle an array with python, randomize array item order with python
  52. Converting Dictionary to List?
  53. Python Sets vs Lists
  54. AttributeError: ‘list’ object has no attribute ‘replace’ when trying to remove character
  55. How do I get an empty array of any size in python?
  56. How to deep copy a list?
  57. Python return list from function
  58. How to remove specific elements in a numpy array
  59. Add single element to array in numpy
  60. How to check if a string is a substring of items in a list of strings?
  61. How do I check if a list is empty?
  62. IndexError: list index out of range and python
  63. Pop index out of range
  64. Print list without brackets in a single row
  65. How to iterate through two lists in parallel?
  66. Make list of arrays in python
  67. How to remove \n from a list element?
  68. Map to List error: Series object not callable
  69. how to create a list of lists
  70. Python assigning multiple variables to same value? list behavior
  71. Python Array Rotation
  72. How do I check if there are duplicates in a flat list?
  73. How can I create a text input box with Pygame?
  74. Append a tuple to a list – what’s the difference between two ways?
  75. How to fix “TypeError: len() of unsized object”
  76. How can I remove all instances of an element from a list in Python?
  77. Create an empty list in Python with certain size
  78. How to concatenate items in a list to a single string?
  79. Numpy.dot TypeError: Cannot cast array data from dtype(‘float64’) to dtype(‘S32’) according to the rule ‘safe’
  80. What’s the difference between lists enclosed by square brackets and parentheses in Python?
  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 plot an array in python?
  85. How to create a numpy array of all True or all False?
  86. Removing nan values from an array
  87. Root mean square of a function in python
  88. What are the differences between numpy arrays and matrices? Which one should I use?
  89. How do I merge lists in python? [duplicate]
  90. creating a reverse method for a python list from scratch
  91. Counting array elements in Python
  92. How to normalize a NumPy array to within a certain range?
  93. numpy array concatenation error: 0-d arrays can’t be concatenated
  94. Sorting arrays in NumPy by column
  95. In Python, is there an elegant way to print a list in a custom format without explicit looping?
  96. Hashing arrays in Python
  97. Determine if 2 lists have the same elements, regardless of order? [duplicate]
  98. Building a list inside a list in python
  99. Writing Python lists to columns in csv
  100. Can I put a tuple into an array in python?

Leave a Comment