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Fix unresolved name: insert_tail()

Browse Source 
insert_tail(Head.next, data) --> Head.next.insert_tail(data)

Fixes: $ __flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics__
```
./data_structures/LinkedList/singly_LinkedList.py:14:13: F821 undefined name 'insert_tail'
            insert_tail(Head.next, data)
            ^
1     F821 undefined name 'insert_tail'
```

Also formats the code to be compliant with [PEP8](http://pep8.org).
This commit is contained in:
cclauss 2018-01-21 08:56:16 +01:00 committed by GitHub
parent 54f6d1f6d7
commit d043448fd9
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 38 additions and 36 deletions
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22
data_structures/LinkedList/singly_LinkedList.py
View File

@ -1,21 +1,22 @@
from __future__ import print_function from __future__ import print_function
class Node: # create a Node class Node: # create a Node
def __int__(self, data): def __int__(self, data):
self.data = data # given data self.data = data # given data
self.next = None # given next to None self.next = None # given next to None
class Linked_List: class Linked_List:
pass
def insert_tail(Head, data): def insert_tail(Head, data):
if(Head.next is None): if(Head.next is None):
Head.next = Node(data) Head.next = Node(data)
else: else:
insert_tail(Head.next, data) Head.next.insert_tail(data)
def insert_head(Head, data): def insert_head(Head, data):
tamp = Head tamp = Head
if (tamp == None): if tamp is None:
newNod = Node() # create a new Node newNod = Node() # create a new Node
newNod.data = data newNod.data = data
newNod.next = None newNod.next = None
@ -29,22 +30,23 @@ class Linked_List:
def printList(Head): # print every node data def printList(Head): # print every node data
tamp = Head tamp = Head
while tamp!=None: while tamp is not None:
print(tamp.data) print(tamp.data)
tamp = tamp.next tamp = tamp.next
def delete_head(Head): # delete from head def delete_head(Head): # delete from head
if Head!=None: if Head is not None:
Head = Head.next Head = Head.next
return Head # return new Head return Head # return new Head
def delete_tail(Head): # delete from tail def delete_tail(Head): # delete from tail
if Head!=None: if Head is not None:
tamp = Node() tamp = Node()
tamp = Head tamp = Head
while (tamp.next).next!= None:#find the 2nd last element while (tamp.next).next is not None: # find the 2nd last element
tamp = tamp.next tamp = tamp.next
tamp.next=None#delete the last element by give next None to 2nd last Element # delete the last element by give next None to 2nd last Element
tamp.next = None
return Head return Head
def isEmpty(Head): def isEmpty(Head):