Python function which can transverse a nested list and print out each element

Python function which can transverse a nested list and print out each element

Content Index :

Python function which can transverse a nested list and print out each element
Tag : python , By : Pat
Date : November 24 2020, 05:47 AM

No Comments Right Now !

Boards Message :
You Must Login Or Sign Up to Add Your Comments .

Share : facebook icon twitter icon

I have nested lists as entries to a Python dictionary. How do I print the nested list whose first elements is "S&qu

Tag : python , By : jehammon
Date : March 29 2020, 07:55 AM
like below fixes the issue I have a dictionary that looks like this:
def first_s(lst):
    if not (isinstance(lst, list) and lst):
        return None
    if lst[0] == ['S']:
        return lst
        for x in lst:
            y = first_s(x)
            if y:
                return y
>>> print first_s(my_dict.values())
[['S'], [[[['E'], [['A', 'B'], ['C', 'D']]]], [[['G'], [['H', 'J'], [[['E'], [['A', 'B'], ['C', 'F']]]]]]]]]

Tag : python , By : Sonal
Date : March 29 2020, 07:55 AM
With these it helps If you are willing to use lxml, then the following is a solution which uses XPath:
import re
from lxml.etree import fromstring

with open("ABD6ECF0-DC8E-41DE-89F2-1E36ED9D6535.xml") as f:
    xmlstring = f.read()

xmlstring = re.sub(r'\sxmlns="[^"]+"', '', xmlstring, count=1)

doc = fromstring(xmlstring.encode())  # lxml only accepts bytes input, hence we encode

for title in doc.xpath('//title'):  # for all title nodes
     title_text = title.xpath('./text()')  # get text value of the node

     # get all text values of the paragraph nodes that appear lower (//paragraph)
     # in the hierarchy than the parent (..) of <title>
     paragraphs_for_title = title.xpath('..//paragraph/text()')

     print(title_text[0] if title_text else '') 
     for paragraph in paragraphs_for_title: 

how to print dictionary key with first element of nested list

Tag : python , By : user179445
Date : March 29 2020, 07:55 AM

Tag : list , By : Robert MacGregor
Date : March 29 2020, 07:55 AM
This might help you Does it matter that the values are two-dimensional coordinates? Is there an ordering on them that you must respect, or is it simply the ordering of the elements in the list? I will assume the latter.
If you want to split a list at some point, the standard append/3 predicate is usually the way to go. For example, assume we want to cut the list [a, b, c, d, e] into a prefix containing the elements before c and a suffix containing the elements after c. Here is how that is done:
?- append(Prefix, [c | Suffix], [a, b, c, d, e]).
Prefix = [a, b],
Suffix = [d, e] ;
?- append(Prefix, [c | Suffix], [a, b, c, d, e]), append(Prefix, [c], UpToAndIncludingC).
Prefix = [a, b],
Suffix = [d, e],
UpToAndIncludingC = [a, b, c] ;
list_pivot_prefix(List, Pivot, Prefix) :-
    append(Prefix0, [Pivot | _Suffix], List),
    append(Prefix0, [Pivot], Prefix).
find_list(Lists, Element, Prefix) :-
    member(List, Lists),
    list_pivot_prefix(List, Element, Prefix).
?- find_list([[(1,2),(1,3),(1,4)],[(2,2),(2,3),(2,4)]],(1,3),List2).
List2 = [ (1, 2), (1, 3)] ;

Python: Drop duplicate element within nested list, if element is an element within another nested list

Tag : python , By : Frank
Date : October 06 2020, 02:00 AM
I wish this helpful for you If order doesn't matter:
use set operations on each pair of nested lists. Subtracting two sets produces a new set with only the elements from the first that don't appear in the second. Use the zip() function to pair up the nested lists from your two input lists. If your output must consist of nested lists again, convert the result of the set operation back to a list, with list() Use a list comprehension to process each pair of nested lists, creating a new list with the results.
[list(set(b) - set(a)) for a, b in zip(listA, listB)]
[set(b) - set(a) for a, b in zip(listA, listB)]
>>> listA = [['A', 'B', 'C', 'D', 'E'], [1, 2, 3, 4, 5], ['!', '@', '#', '$', '%']]
>>> listB = [['E', 'A', 'T', 'F', 'W'], [5, 6, 8, 2, 9], ['@', '^', '&', '#', '*']]
>>> [list(set(b) - set(a)) for a, b in zip(listA, listB)]
[['W', 'F', 'T'], [8, 9, 6], ['^', '&', '*']]
>>> [set(b) - set(a) for a, b in zip(listA, listB)]  # without list(...)
[{'W', 'F', 'T'}, {8, 9, 6}, {'^', '&', '*'}]
[[v for v in nested_b if v not in set_a] for set_a, nested_b in zip(map(set, listA), listB)]
>>> [[v for v in nested_b if v not in set_a] for set_a, nested_b in zip(map(set, listA), listB)]
[['T', 'F', 'W'], [6, 8, 9], ['^', '&', '*']]
Related Posts Related QUESTIONS :
  • need of maximum value in int
  • a list of several tuples, how to extract the same of the first two elements in the small tuple in the large tuple
  • Display image of 2D Sinewaves in 3D
  • how to prevent a for loop from overwriting a dictionary?
  • How To Fix: RuntimeError: size mismatch in pyTorch
  • Concatenating two Pandas DataFrames while maintaining index order
  • Why does this not run into an infinite loop?
  • Python Multithreading no current event loop
  • Element Tree - Seaching for specific element value without looping
  • Ignore Nulls in pandas map dictionary
  • How do I get scrap data from web pages using beautifulsoup in python
  • Variable used, golobal or local?
  • I have a regex statement to pull all numbers out of a text file, but it only finds 77 out of the 81 numbers in the file
  • How do I create a dataframe of jobs and companies that includes hyperlinks?
  • Detect if user has clicked the 'maximized' button
  • Does flask_login automatically set the "next" argument?
  • Indents in python 3
  • How to create a pool of threads
  • Pandas giving IndexError on one dataframe but not on another similar dataframe
  • Django Rest Framework - Testing client.login doesn't login user, ret anonymous user
  • Running dag without dag file in airflow
  • Filling across a specified dimension of a numpy array
  • Python populating dataframe in pandas from text files
  • How to interpolate a single ("non-piecewise") cubic spline from a set of data points?
  • Divide 2 integers (leetcode 29) - recursion issue
  • Can someone explain why do I get this output in Python?
  • How do I scrape pdf and html from search results without obvious url
  • Is there a way to automatically make a "collage" of plots with matplotlib?
  • How to combine multiple rows in pandas with shared column values
  • How do I get LOAD_CLASSDEREF instruction after dis.dis?
  • Django - How to add items to Bootstrap dropdown?
  • Linear Regression - Does the below implementation of ridge regression finding coefficient term using gradient method is
  • How to drop all rows in pandas dataframe with negative values?
  • Most Efficient Way to Find Closest Date Between 2 Dataframes
  • Execution error when Passing arguments to a python script using os.system. The script takes sys.argv arguments
  • Looping through a function
  • Create a plot for each unique ID
  • a thread python with 'while' got another thread never start
  • Solution from SciPy solve_ivp contains oscillations for a system of first-order ODEs
  • trigger python events driven by selenium controlled browser
  • Passing line-edits to a contextmanager to set validators
  • Python: globals().items() iterations try to change a dict
  • Is it possible to specify starting values for each parameter (instead of bounds) for scipy's differential evolution?
  • why datetime.now() and constructed datetime using all fields(like year,month...) of now has big timedelta?
  • MySQL multiple table UPDATE query using sqlalchemy core?
  • find if a semantic version is superset of of another version python
  • Type checking against dynamically created objects
  • Struggling with simple reverse function
  • Is there a function for finding the midpoint of n points on sklearn.neighbors.NearestNeighbors?
  • How to set max number of tweets to fetch
  • PYTHON 3.7.4 NOT USING SQLITE 3.29.0
  • How to replace Nan value with zeros in a numpy array?
  • How to speed up calculating variance among sparse matrix
  • cupy code is not fast enough compared with numpy
  • How to count frequency of select values in Python pandas dataframe
  • Scrape Span Text from Google
  • Python watchdog, watch a directory and rename file on event.modification
  • Filtering rows in DataFrame with dependent conditions
  • How to check if a character is a not a part of number or URL in string?
  • Compare corresponding elements of a list
  • shadow
    Privacy Policy - Terms - Contact Us © scrbit.com