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Meaning of list[-1] in Python - Stack Overflow
Sep 19, 2018 · All your return c.most_common()[-1] statement does is call c.most_common and return the last value in the resulting list, which would give you the least common item in that …
python - Removing duplicates in lists - Stack Overflow
Nov 1, 2011 · 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 …
python - How to convert list to string - Stack Overflow
Apr 11, 2011 · 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 …
Best way to remove elements from a list - Stack Overflow
Feb 2, 2014 · 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 …
pandas dataframe index: to_list () vs tolist () - Stack Overflow
Sep 9, 2019 · tolist() is a method of NumPy arrays that returns a list representation of the array. to_list() is a method of Pandas dataframes that returns a list representation of the dataframe. …
List of zeros in python - Stack Overflow
Dec 16, 2011 · See why [] is faster than list() There is a gotcha though, both itertools.repeat and [0] * n will create lists whose elements refer to same id. This is not a problem with immutable …
How to list all installed packages and their versions in Python?
For Windows 10, I think this is what you are looking for a list of available installed Pythons. This is different from a list of packages as you can see below. Also, on Ubuntu 20.04, I think the …
Sum a list of numbers in Python - Stack Overflow
a is a running reference to the previous value in the list, hence it is initialized to the first element of the list and the iteration occurs over the rest of the list, updating a after it is used in each …
Command to list all files in a folder as well as sub-folders in windows
Mar 11, 2015 · To print specific file present in the folders/sub-folders for eg : If you want to list just the csv files then : dir /b/s/A-D/o:gn *.csv >list.txt If you want to also include .xlsx files then the …
How can I filter items from a list in Python? - Stack Overflow
Aug 22, 2009 · my_list = ['foo','bar','baz','>=','5.2'] # With only_words = [token for token in my_list if token.isalpha()] # Without only_words = filter(str.isalpha, my_list) Personally I don't think you …