exceptions and file handling

... understand the file handling code in the fileinfo.py sample code from teh previous chapter This example shows how to safely open and read from a file and gracefully handle errors Example 6.6 File ... Exception Handling * Python Tutorial discusses defining and raising your own exceptions, and handling multiple exceptions at once * Python Library Reference summarizes all the built-in exceptions ... f in fileList if os.path.splitext(f)[1] in fileExtList] def getFileInfoClass(filename, module=sys.modules[FileInfo. module ]): "get file info class from filename extension" subclass = "%sFileInfo"...

Ngày tải lên: 26/01/2014, 08:20

... CONTENTS DATA FILE HANDLING FILES, RECORDS AND FIELDS CREATING A DATA FILE LOGICAL NAMES FIELDS OPENING A FILE ... CURRENT FILE EXAMPLE - COPIES SELECTED RECORDS FROM ONE FILE TO ANOTHER CLOSING A DATA FILE KEEPING DATA FILES COMPRESSED SERIES 3C AND SIENA DATA FILES AND ... Series DATA FILE HANDLING OPL FILES, RECORDS AND FIELDS Data files (or databases) are made up of records which contain data in each of their fields For example, in a database of names and addresses,...

Ngày tải lên: 19/02/2014, 12:20

... cận để ánh xạ CSDL đến file sử dụng số file, lưu trữ mẩu tin thuộc độ dài cố định vào file cho Một cách khác cấu trúc file cho ta điều tiết nhiều độ dài cho mẩu tin Các file mẩu tin độ dài cố ... chức file đống (Heap File Organization) Trong tổ chức này, mẩu tin lưu trữ nơi file, có không gian cho Không có thứ tự mẩu tin Một file cho quan hệ • Tổ chức file ( Sequential File Organization) ... A-217 A-301 550 • file mẩu tin account Trong phần này, ta giả thiết tất file thứ tự khoá tìm kiếm Các file vậy, với mục sơ cấp khoá tìm kiếm này, gọi file mục (index-sequential files) Chúng biểu...

Ngày tải lên: 15/09/2012, 09:38

... Command to join two files into one $ cat filename1 filename2 > file3 This example joins filename1 and filename2 files into filename3 file Note – If filename3 is existed, this command will overwrite ... program The format for the redirection of standard input, standard output, and standard error is: command > file or command >> file command < file command 2> file Angle Brackets ( >, ) Use the ... ls command to a file called file. list ls > file. list 19 Display the contents of file. list using the cat command cat file. list 20 Append the output of the date command to file. list date >> file. list...

Ngày tải lên: 02/10/2013, 09:20

... oldHandler = b.onclick; // Save the HTML event handler function newHandler( ) { /* My event -handling code goes here */ } // Now assign a new event handler that calls both the old and new handlers ... advanced eventhandling features and retain compatibility with Netscape need to understand this model The rest of this chapter documents each of these event models in turn 19.1 Basic Event Handling ... document element, and the handler for the mouseup event is responsible for deregistering itself and the mousemove handler It is important to note that the mousemove and mouseup handlers are registered...

Ngày tải lên: 05/10/2013, 12:20

... to file handling" FCB Method 0FH Open file 14H Sequential reading 15H Sequential writing 16H Create file 21H Random reading 22H Random writing Handles 3CH Create file 3DH Open file 3EH Close file ... Contents 5.7.1 Working with handles 5.7.2 Functions to use handles 5.7.1 Working with handles The use of handles to manage files greatly facilitates the creation of files and programmer can concentrate ... the first one is by means of file control blocks or "FCB" and the second one is by means of communication channels, also known as "handles" The first way of file handling has been used since...

Ngày tải lên: 06/10/2013, 20:20

... values, conflict and each of these modes of conflict handling can be useful under management different sets of circumstances For example, following the five conflictand conflict handling modes identified ... resolution and the results of the Singapore survey on handling conflict Finally it makes some comments about the implications for management and organizations in a changing global and regional ... to rules and regulations, policies and procedures leading to rigidity and inflexibility; employee alienation; concentration of power and external user frustration Employee alienation and strict...

Ngày tải lên: 13/12/2013, 20:15

... Hacking and Countermeasures v6 Computer Forensics and Incident Handling Exam 312-50 Certified Ethical Hacker Procedure for Handling Incident The incident handling process is divided into six stages ... Countermeasures v6 Computer Forensics and Incident Handling Exam 312-50 Certified Ethical Hacker Defining the Relationship between Incident Response, Incident Handling, and Incident Management EC-Council ... Hacking and Countermeasures v6 Copyright © by EC-Council All Rights Reserved Reproduction is Strictly Prohibited Ethical Hacking and Countermeasures v6 Computer Forensics and Incident Handling...

Ngày tải lên: 26/12/2013, 21:12

... rename a file The more conventional way to rename a file is to select the file by clicking on it once Then, with the file “testfile.txt” selected, go to the File menu of Windows Explorer and select ... select Rename This will outline the filename with a box and highlight the name of the file Now type a new file name for the file, such as “newname.txt” After the file is renamed, press the enter ... way to rename a file in Windows is to right-click on the filename itself and select Rename from the drop-down menu Use this method to rename the file back to the original name “testfile.txt” Both...

Ngày tải lên: 18/01/2014, 05:20

... IllegalComponentStateException instance with no detail message 10 July 2002 22:23 468 CHAPTER 13: AWT EXCEPTIONS AND ERRORS public IllegalComponentStateException (String message) # This constructor creates ... initialized or if you try to create a FileDialog within Netscape Navigator (since that program does not permit local file system access) When an AWTError is thrown and not caught, the virtual machine ... catching this exception isn’t a bad idea, since it should be fairly easy to correct the problem and retry the operation 13.2.1 IllegalComponentStateException Method Constructor public IllegalComponentStateException...

Ngày tải lên: 21/01/2014, 06:20

... Systems and File Management 19 Handheld Operating Systems Chapter 4: Operating Systems and File Management 20 SECTION File Basics C File Names and Extensions File Directories and Folders File ... data files and program files Chapter 4: Operating Systems and File Management 35 File Management Tips Don’t store files in the root directory Access files from the hard disk Accessing files ... Operating Systems and File Management 39 Physical File Storage Deleting a file changes the status of that file s clusters to empty and removes the file name from the index file – The file s data is...

Ngày tải lên: 06/03/2014, 09:21

... 26.3 (continued) 26.43 Figure 26.19 POP3 and IMAP4 26.44 Figure 26.20 The exchange of commands and responses in POP3 26.45 26-3 FILE TRANSFER Transferring files from one computer to another is one ... to send an e-mail and simulate the commands and responses we described in this section We use TELNET to log into port 25 (the well-known port for SMTP) We then use the commands directly to send ... Content-transfer-encoding 26.33 Figure 26.16 SMTP range 26.34 Figure 26.17 Commands and responses 26.35 Figure 26.18 Command format 26.36 Table 26.7 Commands 26.37 Table 26.8 Responses 26.38 Table 26.8 Responses...

Ngày tải lên: 15/03/2014, 12:20

... Sequential-Access file: the File streams— FileInputStream, FileOutputStream, FileReader and FileWriter—allow you to treat a file as a stream to input or output sequentially  Each file stream type has ... which is the name of the file A constructor that take a File object which refers to the file A constructor that takes a FileDescriptor object Random-Access file: RandomAccessFile allow you to read/write ... characters  19 Example of RandomAccessFile import java.io.*; class Filecopy { public static void main(String args[]) { RandomAccessFile fh1 = null; RandomAccessFile fh2 = null; long filesize = -1; byte[]...

Ngày tải lên: 24/03/2014, 03:20

... Staples, Turner Broadcasting, and Ambrosi (now Schawk) He has spoken at the FileMaker Developers Conference and has had numerous articles published in FileMaker Advisor and php|architect magazines ... of FileMaker web publishing; Eric Jacobson, Kevin Nathanson, and the rest of the team at FileMaker, Inc., for doing such a great job with the API; and Graham Sprague for introducing me to FileMaker ... documents, and covers the most important features of the PHP scripting language Part II, “Laying the Groundwork,” is devoted to building a FileMaker database file, setting up and configuring the FileMaker...

Ngày tải lên: 05/04/2014, 20:01

... Exception Handling: try…catch finally Exception Handling: try…catch try{ // code that may cause exception } catch ( ExceptionTypeA e ){ // statement to handle errors occurring // ... e.KeyChar

Ngày tải lên: 13/05/2014, 11:30

... BufferedStream public void WriteToFile_BufferedStream(string fileName, FileMode fileMode, FileAccess fileAccess) { FileStream fileStream = new FileStream(fileName, fileMode, fileAccess); BufferedStream ... liệu từ MemoryStream vào file public void WriteToFile_MemoryStream(string fileName, FileMode fileMode, FileAccess fileAccess) { MemoryStream memoryStream = null; FileStream fileStream = null; memoryStream ... tác với file văn 4.1 StreamReader static void Main(string[] args) { string fileName = @"C: \File. txt"; ReadFile(new FileStream(fileName, FileMode.Open, FileAccess.Read)); } static void ReadFile(Stream...

Ngày tải lên: 12/07/2014, 19:20

... desiccation and rough -handling when applied singly or in combination on seedling quality and field performance; and to relate field performance to differences in seedling morphology, moisture content and ... blocks split first for species and nursery treatment and second for desiccation and rough -handling treatment Each block contained one 20-plant plot of each species and treatment combination Assessments ... influence the fine root biomass and there was no consistent pattern in the way undercutting affected lateral and fine root biomass of birch and beech on the one hand and oak and ash on the other Thus,...

Ngày tải lên: 08/08/2014, 14:21

... Started - installing and configuring RDz - and the course materials, and using Eclipse to edit COBOL COBOL General Language Rules Basic COBOL Statements Additional record and table handling Debugging ... Functions, Date and Time coding patterns, and Language Environment calls OS/390 Concepts and JCL - Compile/Link & Run Procs on the mainframe Indexed file Coding Patterns Sort/Merge, Sequential File Match/Merge ... Representation and assignment (MOVE statement) Lab Open ended workshop 11 Unit Additional Record and COBOL Table Handling Facilities Topics:  Additional Record Concepts  COBOL Tables – Definition and...

Ngày tải lên: 23/10/2014, 20:10

... throughout “K” LINE and its group companies In that regard, “K” Line (Japan) Ltd joined us in our environmental campaign in July 2002, and both Kawasaki Kinkai Kisen Kaisha, Ltd and Nitto Total Logistics, ... paper used in offices/aboard ships and magazines published by the Company should use recycled paper At the same time, wastes originating in offices, aboard ships and at terminals should be thoroughly ... March 2003, about 93% of our own vessels were using non-fouling, tin-free paints Saving Resources and Energy We are endeavoring to perform ship operations in a manner that reduces CO gas, a contributor...

Ngày tải lên: 08/05/2016, 08:38

Ngày tải lên: 01/06/2016, 09:55