Python

NP datetimelm arch_model cx_oracle Column, String, create_engine PD Declare various list variables openlist= [] Closelist = [] Highlist = [] Lowlist = [] Vollist = [] Oraengine = Create_engine (' oracle://username:

#-*-Coding:utf-8-*-import cx_oracle from pprint import pprint import CSV import time import re import binascii conn = Cx_oracle.connect (' system/oracle@192.168.137.2/serv ') cursor = conn.cursor () table_name= "t300" owner= "system" F = Open (table_

The recent use of Python to connect to an Oracle database has encountered some connectivity problems and found that there are two main ways to connect: method1 Import cx_oracle con = cx_oracle.connect (DataBase urser Name, password,ip) cursor = con.

#!/usr/bin/python #-*-coding:utf-8-*-import re import os import urllib2 def gethtml (URL): From URLLIB2 import HT Tperror try:page = urllib2.urlopen (URL) html = Page.read (); Except Httperror:return "http://www.moko.cc/channels/post/28/1.html" #

Suit, first look at the Python matpotlib official website http://matplotlib.org/examples/index.html on the completion of what the example, after all, their own research API too time-consuming 1, Import NumPy as NP import Matplotlib.pyplot as

I've always wanted to learn python, but programmers know that when you actually use a language, it's the most efficient, so I'm going to use it now. Originally this drawing work, my colleagues have done with MATLAB, but I have always felt that the

1. System EnvironmentSystem: CentOS 6.7 64-bit python:2.6.6 (System with self) Ide:pycharm Community Edition 2. Build the drawing environment#yum Install Python-matplotlib 3. DrawingThe first example, very classic, draws the point line diagram

Problem Description: For example, I have an array: a=[10,12,3,4,9] The last I wanted was: [4,5,1,2,3] is to convert the elements in array A to their corresponding size sort values by size. Idea: 1, save the position and the value with the

In large network applications, serialization is a necessary means, so be sure to understand the serialization of performance consumption, in order to write high-performance programs. Commonly used serialization is the use of pickle, unpopular is the

(Beginners python, will encounter errors to stay here, warning themselves, but also for others to do the reference) Today, when writing Python code, refer to someone else's code, call the request module in Urllib, and call the Urlopen function in

The famous Tiobe list has just released the latest February 2018 programming speech rankings. Tiobe Programming Community Index is an index of programming speech evaluation, which is updated once a month. Small friends quickly look at the following

One, xlrd and XLWT installation1. Download XLWT installation package https://pypi.org/project/xlwt/#files2. Enter the file directory after decompression3. Execute Python setup.py installSecond, read operation1 #-*-conding:utf-8-*-2 __author__=' DSH'3

Python learning [13th] condition and circular if statement single if statementThe IF statement has three parts, the keyword if itself, the conditional expression that determines whether the result is true, and whether the expression is real or not 0

1. The role of the log:In the case of software or system errors, you can quickly locate the error through the log, so as to locate the problem and solve the problem.2. Level of log: DEBUG Most verbose log information, typical application

There may be multiple versions of Python in a corporate server, and there are multiple versions of the packages in Python, which often cause procedural conflicts and affect productivity due to the different needs of different apes. So, let's share a

I. Primary knowledge object-orientedProcess-oriented program design is the core of process (pipeline thinking), the process is to solve the problem of the steps, process-oriented design is like a well-designed pipeline, consider when to deal with

Above is pressing the button 1 on the deposit, otherwise the withdrawal.No, deposit and withdrawal to enter the password Ah!!! So, we need to add a password to verify the code.Incoming group: 125240963 to get dozens of sets of PDFs Oh!As you can see,

1. Is the string an iterative object? Can I use a for loop for each element?A: an iterative object = = can be iterated by for, and the string is an iterative object.What is the difference between range in 2.python2 and Phthon3?A: Python2:range is

manipulating strings, using Stringio#!/usr/bin/python# -*- coding: utf-8 -*-from io import stringiof =  stringio () f.write (' Hello ') print (F.getvalue ()) run Result: Traceback (most recent): File "stringio.py", line 6, in f.write (' hello ')

1. Web applicationsThe most primitive access flow for Web apps: The client sends an HTTP request; The server receives the request and generates an HTML document; The server constructs an HTTP response that includes: Response header (