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I'm trying something with Python. I want to slice a list (plateau) in several list (L[i]) but I have the following error message:
File "C:\Users\adescamp\Skycraper\skycraper.py", line 20, in <module> item = plateau[debut:fin] TypeError: slice indices must be integers or None or have an __index__ method The concerned line is the one with item = plateau[debut:fin]
from math import sqrt plateau = [2, 3, 1, 4, 1, 4, 2, 3, 4, 1, 3, 2, 3, 2, 4, 1] taille = sqrt(len(plateau)) # Division en lignes L = [] i = 1 while i < taille: fin = i * taille debut = fin - taille item = plateau[debut:fin] L.append(item) i += 1 
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The Python "TypeError: list indices must be integers or slices, not str" occurs when we use a string instead of an integer to access a list at a specific index. To solve the error, use the int() class to convert the string to an integer, e.g. my_list[int(my_str)] . Here is an example of how the error occurs.
The Python "TypeError: list indices must be integers or slices, not float" occurs when we use a floating-point number to access a list at a specific index. To solve the error, convert the float to an integer, e.g. my_list[int(my_float)] .
Python slice() FunctionThe slice() function returns a slice object. A slice object is used to specify how to slice a sequence. You can specify where to start the slicing, and where to end. You can also specify the step, which allows you to e.g. slice only every other item.
The start parameter represents the starting index, end is the ending index, and step is the number of items that are "stepped" over. If step isn't explicitly given, the default value is 1 .
Your debut and fin values are floating point values, not integers, because taille is a float.
Make those values integers instead:
item = plateau[int(debut):int(fin)] Alternatively, make taille an integer:
taille = int(sqrt(len(plateau))) If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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