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- python - How to convert list to string - Stack Overflow
Agree with @Bogdan This answer creates a string in which the list elements are joined together with no whitespace or comma in between You can use ', ' join(list1) to join the elements of the list with comma and whitespace or ' ' join(to) to join with only white space –
- python - Removing duplicates in lists - Stack Overflow
def make_unique(original_list): unique_list = [] [unique_list append(obj) for obj in original_list if obj not in unique_list] return unique_list Some may consider list comprehension with a side effect to not be a good solution
- Best way to remove elements from a list - Stack Overflow
This makes indexing a list a[i] an operation whose cost is independent of the size of the list or the value of the index When items are appended or inserted, the array of references is resized Some algorithm is applied to improve the performance of appending items repeatedly; when the array must be grown, some extra space is allocated so the
- What is the syntax to insert one list into another list in python?
List slicing is quite flexible as it allows to replace a range of entries in a list with a range of
- Get a list from Pandas DataFrame column headers
Create a list of keys columns - object method to_list() and the Pythonic way: my_dataframe keys() to_list() list(my_dataframe keys()) Basic iteration on a DataFrame returns column labels: [column for column in my_dataframe] Do not convert a DataFrame into a list, just to get the column labels
- TypeError: list indices must be integers or slices, not str
1 A list is used as if it were a dictionary 1 1 Index a list as if it was a dictionary This case commonly occurs when a json object is converted into a Python object but there's a dictionary nested inside a list It is especially annoying (and easy to overlook) if the list has a single dictionary inside it
- writing a list to a txt file in python - Stack Overflow
writelines() needs a list of strings with line separators appended to them but your code is only giving it a list of integers To make it work you'd need to use something like this: To make it work you'd need to use something like this:
- Array versus List lt;T gt;: When to use which? - Stack Overflow
Using e g List<Point> list, it would be necessary to instead say Point temp=list[3]; temp x+=q; list[3]=temp; It would be helpful if List<T> had a method Update<TP>(int index, ActionByRefRef<T,TP> proc, ref TP params) and compilers could turn list[3] x+=q; into {list Update(3, (ref int value, ref int param)=>value+=param, ref q); but no
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