Whats wrong with my iteration list of lists from csv

» python » Whats wrong with my iteration list of lists from csv

By : mohammad fallah

Date : January 12 2021, 08:33 AM

I wish this helpful for you I'm tyring to create a list of lists. So I want to put every line of text in a separate list within the climatelist. , Try:

code :

content = []
with open(fname) as f:
    content.append([f.readline()])

content = [[line] for line in open('fname')]

content = [[line] for line in open('fname') if line != '\n']

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Generate a list of lists from an iteration

By : Ariel Calderon Solis

Date : March 29 2020, 07:55 AM

like below fixes the issue Here is an example of the problem I'm trying to solve: , You were almost there, use:

code :

print [[add_up(a, b) for b in d] for a in e]  # prints [[2, 3, 4], [3, 4, 5]]

Lists returned in wrong format in nested tree to list-of-lists conversion

By : user2941968

Date : March 29 2020, 07:55 AM

wish helps you I am trying to write functions to move a tree structure between a list of lists format and a nested dictionary format. The two functions (paths2tree and tree2paths) are given in the code below. The conversion from a list of lists to the nested tree (paths2tree function) works fine but the reverse transformation, (tree2paths, built as an iterator), fails to yield the correct lists. , The problem lies here:

code :

newbase = list(tree2paths(tree[branch],subbase))
yield newbase

def tree2paths(tree,base=None):
  for branch in tree.keys() : 
        if base is None:
            subbase = [branch]
        else:
            subbase = base+[branch]
        yield subbase
        print subbase
        newbase = list(tree2paths(tree[branch],subbase))
        for i in newbase:
            yield i

['root']
['root', 'toot']
['root', 'toot', 'tad']
['root', 'toot', 'tad', 'two']
['root', 'toot', 'tah']
['root', 'boot']
['root', 'boot', 'bad']
['root', 'boot', 'bah']

Updating list of lists at iteration

By : Jorge Alagon

Date : March 29 2020, 07:55 AM

wish helps you The list multiplication operator * does not create copies, but creates multiple references to the same data. Instead of using * consider using comprehensions for initializing your list:

code :

my_list = [[0 for i in range(n)] for j in range(n)]

Why does this iteration over a list of lists not work?

By : user2731752

Date : March 29 2020, 07:55 AM

this will help
You need to remove s1 = sentence.split(' ') from GetNodule because sentence has already been tokenized (it is already a List).

whats wrong with my c++ list<string>

By : mouni peram

Date : March 29 2020, 07:55 AM

wish of those help Fred Larson already speculated that your code was wrong because you've been illegally adding stuff to the std:: namespace. That's true. However, looking at the error about ‘std::TP u’, it's clear that you aren't showing the relevant code at all. You have two declarations of u in bee.cpp, and your code excerpt shows neither.