Python list stack overflow code#

Where methods like flat_list = have not worked. I recently came across a situation where I had a mix of strings and numeric data in sublists such as test = ['591212948', Importing images from a directory (Python) to list or dictionary from PIL import Image import glob imagelist for filename in glob.globyourpath/. Here is my own answer on that thread, though it may not be the best answer. This question was well answered on StackOverflow, see Making a flat list out of list of lists in Python Your question is focused on flattening a list. RecursionError: maximum recursion depth exceeded in comparison Traceback (most recent call last):įile '/Research/SoftDev/SEPJ/StackOverflow_qs.py', line 42, in įile '/Research/SoftDev/SEPJ/StackOverflow_qs.py', line 36, in single_listįile '/Research/SoftDev/SEPJ/StackOverflow_qs.py', line 35, in single_listįile '/usr/local/Cellar/python/3.6.5/Frameworks/amework/Versions/3.6/lib/python3.6/abc.py', line 184, in _instancecheck_įile '/usr/local/Cellar/python/3.6.5/Frameworks/amework/Versions/3.6/lib/python3.6/_weakrefset.py', line 75, in _contains_ from collections import Iterable def singlelist (list): for item in list: if isinstance (item, Iterable): yield from singlelist (item) else: yield item Itemlist 10,20, 30. The operator module has the itemgetter function, which takes item as argument and sort based on the argument. For example, sortedlistsorted (emprecords, keylambda emp : emp 1) //Here 1 means ID print (sortedlist) You can also use the operator module.

To convert nested list into a single list, I write a recursive function using collections module. You can use lambda function to pass argument by which you need to sort the records. Stack’s insert operation is called push and delete operation is called pop. Python’s built-in lists support push and pop operations of the stack. When I run my program, I get the following error message. Some elements of the list is an another list. Unlike other programming languages, Python does not have a specified stack data structure but the lists in Python pretty much work like stacks.

Python list stack overflow code#

def permutation (flag, k 1 ): N len (flag) for i in xrange (0, N): if flag i 0: continue flag i k if k N: print flag permutation (flag, k+1) flag i 0 permutation ( 0, 0, 0) Pathros well, the code above is for Python 2.

To convert nested list into a single list, I write a recursive function using collections module. Answer is highly inspired by Get all permutations of a numpy array. add up all the numbers in each row and output that number output the grand total of all rows. Compute the variance of this RDD’s elements. Some elements of the list is an another list. if a specific column name is present drop tyhe column.