python pandas merge

')) # get PDF Share how many pages Page_count = PD F_input.getnumpages () print (page_count) for I in Range (Page_count): Pdf_output.addpage (pdf_input. GetPage (i)) pdf_output.write (open (OUTFN, ' WB ')) if __name__ = = ' __main__ ': infn = '/bbs_pdf/' + sys.argv[1] Outf n = '/bbs_pdf/outfn.pdf ' split_pdf (INFN, OUTFN) The above script executes in Linux/usr/local/bin/python3/bbs_pdf/mypdf.py 8.pdf 4The first 4 pages of the 8.pdf PDF file are captured.3, in PHP call

Merge sort1 #!/usr/bin/env Python32 defmergesort (array):3 " "merge sort, explode" "4 ifLen (array) :5 returnArray6MID = Len (array)//27left =mergesort (Array[:mid])8right =mergesort (array[mid:])9 returncombine (left, right)Ten One A defcombine (left, right): - " "Merge two ordered lists" " -result = [] the whileLeft andRight : -

implementation#Algorithm time complexity O (LOGN)#Recursive#two steps: 1. Splitting 2. Mergingdef_merge (A:list, B:list)list:#Merge two sort tablesc = [] whileLen (a) > 0 andLen (b) >0:ifA[0] b[0]: C.append (a[0]) A.remove (a[0])Else: C.append (b[0]) B.remove (b[0])ifLen (a) = =0:c+=bElse: C+=areturnCdef_merge_sorted (Nums:list)list:#Won ' t sort in place ifLen (nums) : returnnums M= Len (nums)//2a=_merge_sorted (nums[:m]) #前半b=_merge_s

Download and merge SAE logs using the Python script. For some reason, log files on the site on the SAE can only be downloaded by day from the SAE. The downloading process is quite painful, especially when the number is large. Fortunately, SAE provides APIs to obtain log files in batches. After writing a python script, it automatically downloads and merges these f

title :Merge sorted linked lists and return it as a new list. The new list should is made by splicing together the nodes of the first of the lists.code : OJ online test via runtime:208 ms1 #Definition for singly-linked list.2 #class ListNode:3 #def __init__ (self, x):4 #self.val = x5 #Self.next = None6 7 classSolution:8 #@param listnodes9 #@return a ListNodeTen defmergetwolists (self, L1, L2): One ifL1 isNone: A returnL

' Age=28Addr='Chengdu' Money='200w'Cars='1w Units'words='INSERT INTO user values ("%s", "%s", "%s", "%s", "%s", "%s");'% (User,sex,age,addr,money,cars)#order can not be chaotic, must be in order toPrint(words)The output is:Insert into user values ("Emily", "female", "28", "Chengdu", "200w", "1w Station")Mode 2user ='Emily'Sex='female' Age=28Addr='Chengdu' Money='200w'Cars='1w Units'SQL='INSERT into user values ({name},{sex},{age},{addr},{qian},{che})'New_sql=sql.format (age=age,che=cars,name=use

Theory does not say much: Copy Code code as follows: #!/usr/bin/python Import Sys def merge (array, q, p, r): Left_array = array[q:p+1] Right_array = array[p+1:r+1] Left_array_num = Len (left_array) Right_array_num = Len (right_array) I, J, k= [0, 0, Q] While I if (Left_array[i] ARRAY[K] = Left_array[i] I+=1 Else ARRAY[K] = Right_array[j] J+=1 K+=1 While I ARRAY[K] = Left_

1, installation Lmdb2. Ubuntu system command: Pip install Lmdb3. Running code: combine_lmdb.py#!/usr/bin/env Python2#-*-Coding:utf-8-*-"""Created on Sun 12 17:50:48 2018@author: Sarah"""Import LmdbENV1 = Lmdb.open ("/home/www/www_python/dataset/train_001_lmdb")Env2 = Lmdb.open ("/home/www/www_python/dataset/train_002_lmdb")TXN1 = Env1.begin ()TXN2 = Env2.begin ()Database1 = Txn1.cursor ()Database2 = Txn2.cursor ()Env3 = Lmdb.open ("/home/www/www_python/dataset/train_result_lmdb", Map_size=int (1

Python to merge two Arrays This example describes how to merge two arrays in python. Share it with you for your reference. The details are as follows: Python merges two arrays and concatenates them into an array. For example, array a = [, 3], array B = [, 6], and connected

1 #Coding=utf-82 #!/usr/bin/python3 4 ImportSYS5 6 defmerge (Nums, first, Middle, last):7 "Merge"8 #slice boundaries, left-open, starting from 09Lnums = nums[first:middle+1 ]TenRnums = nums[middle+1:last+1 ] One lnums.append (sys.maxint) A rnums.append (sys.maxint) -L =0 -R =0 the forIinchRange (First, last+1 ): - ifLNUMS[L] Rnums[r]: -Nums[i] =Lnums[l] -L+=1 + Else: -Nums[i] =Rnums[r] +R+=1 A at defMerge_sort (Nums, Firs

#[leetcode] Merge k Sorted Lists merge K ordered list (ascending)Import NumPy as NPImport timeClass Node (object):def __init__ (Self,n,next_node=none):Self.data=nSelf.next=next_nodeClass Linklist (object):def __init__ (self):Self.head=nonedef init (self,data):Assert type (data) ==list,type (data)Self.head=node (Data[0],none)P=self.headFor i in Data[1:]:Node=node (i)P.next=nodeP=p.nextDef show (self):L=[]P=s

Original title address: https://oj.leetcode.com/problems/merge-k-sorted-lists/Test instructions: Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity.Problem Solving Ideas:Merge K's already sequenced list, using the data structure of the heap. Heap, also called: Priority queueThe head node of each linked list is first entered into the heap.Then the smallest popup

Merge sort: Merges two sequenced serially into one serial operation.Algorithm principleSee the dynamic diagram first:The algorithm is described as follows: The space is applied to the sum of two sorted serial, which is used to store the merged serial; Set two pointers, the initial position is the starting position of two sorted serial; Compare the elements pointed to by two pointers, select a relatively small element into the

Two days ago just loaded Python 3.1.1, can't help itched write point code.1. Select sort Copy Code code as follows: >>> def selsort (L): Length=len (L) For I in Range (length-1): Minidx=i Minval=l[i] J=i+1 While JIf MINVAL>L[J]: Minidx=j MINVAL=L[J] J=j+1 L[i],l[minidx]=l[minidx],l[i] Return L 2. Bubble sort Copy Code code as follows: >>> def bubsort (L): Swapped=true While swapped: Sw

For some reasons, need SAE on the site log files, from the SAE can only be downloaded, download down manual processing compared to egg pain, especially when the number is very large. Fortunately, the SAE provides API to bulk get log file download addresses, just write a python script to automatically download and merge these files Call API get download Address The document location is here Set your own a

-codeMerge_sort (A, start, end)//a is the array to be sorted, and start and end are the element subscripts for the start and end of the part to be sorted, respectivelyIf start m = (start + end)/2//Find middle positionMerge_sort (Start, m)//Sort the left halfMerge_sort (m+1, end)//right half sortMerge (A, start, M, end)//combine left and right parts3.3merge (A, start, M, end) functionsA is an array, start, M, and end are the starting, intermediate, and ending subscriptsMerge (A, start, M, end)Lef

Source of the topic:https://leetcode.com/problems/merge-k-sorted-lists/ Test Instructions Analysis:Given a list of K-ordered lists, these linked lists are integrated into a new ordered list. Topic Ideas:We have already given two ways to integrate an orderly list. Here, we might as well use the idea of merge sort, the N list as the integration of N/2 and N-N/2, until N/2 Code (

Use Python for merge sorting, excerpt from http://blog.csdn.net/minxihou/article/details/51821052“代码真的不是一气呵成的，而且也不是想当然写出来的。可能需要反复断点中断来查看是否有逻辑错误。在理解了问题的基础下我们需要先把大体的代码框架最好先写出来，特别是主要的逻辑判断语句。但是不需要太care我循环体或者判断里面语句怎么实现，当你把这一步做到的时候能避免很多不必要的错误发生。”1 ImportRandom2 3 defconfiationalgorithm (str):4 ifLen (str) #Sub-sequence5 returnStr6Mid = (len (str)//2)7left = Confiationalgorithm (Str[:mid])#Recursive sl

#-*-Coding:utf8-*-‘‘‘__author__ = ' [email protected] '21:merge Sorted Listshttps://oj.leetcode.com/problems/merge-two-sorted-lists/Merge sorted linked lists and return it as a new list.The new list should is made by splicing together the nodes of the first of the lists.===comments by dabay===The operation of the basic list. First, make a head node and use two po

Index: [Leetcode] leetcode key index (C++/JAVA/PYTHON/SQL)Github:https://github.com/illuz/leetcode021.merge_two_sorted_lists (Easy)links：Title: https://oj.leetcode.com/problems/merge-two-sorted-lists/Code (GitHub): Https://github.com/illuz/leetcodeTest Instructions：Merges two ordered linked lists.Analysis：Very classic topic, but know how to do it easily, simulation can.There are two ways of doing this:1. Op