CSV file reads:The CSV file format is as follows: There are 2 rows and three columns respectively. The access code is as follows:F=Open(R ' E:\py_prj\test.csv ',' RB ')F_csv=csv.reader (f)Ff_csv:FHere F is a tuple, in order to access a field, you
Original article: Python scripts as a replacement for Bash utility scripts
From: http://www.oschina.net/translate/python-scripts-replacement-bash-utility-scripts
Translator: enixyu,Showme,Onion noodles
For Linux users, the reputation of command line
This article describes how to use Python scripts to implement some BashShell tutorials in Linux, including some simple input/output and email functions. For more information, see, command line reputation is quite high. Unlike other operating systems,
The command line has a fairly high reputation for Linux users. Unlike other operating systems, the command line is a scary proposition, but for the experienced Daniel in the Linux community, the command line is the most recommended and encouraged to
Motive
We spend a lot of time migrating data from common interchange formats (such as CSV) to efficient computing formats like arrays, databases, or binary storage. Worse, many people do not migrate data to efficient formats because they do not
The front end can use JavaScript to download the file containing the page data in the client, here is the CSV format file as an example, the code is as follows:function downloadData(data, filename, type) { var file = new Blob(["\ufeff" + data], {
I. Opening and creation of files
>>> f = open ('/tmp/test.txt ') >>> f.read () ' Hello Python!\nhello world!\n ' >>> f
Second, the file readStep: Open-read-close
>>> f = open ('/tmp/test.txt ') >>> f.read () ' Hello Python!\nhello world!\n ' >
Motivation
We spend a lot of time migrating data from a common interchange format (such as CSV) to an efficient computing format like arrays, databases, or binary storage. To make things worse, many people do not migrate data to efficient formats
1. File objectsThe file object can be used not only to access normal disk files, but also to access "files" on any other type of abstraction level. Once the appropriate "hooks" are set, you can access other objects that have the file type interface
When it comes to crawlers, a python crawler package is processed from the Internet. Python library that contains web page capture and data processing. if you need a Python library, refer to the following network
General
Urllib-Network
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