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Python

Python. 20021080 Hyunjong Lee. contents. Introduction Syntax & data types Tools Python as CGI. Introduction. Developed by Guido Van Rossum in 1990 Interpret based language Has simple syntax Dynamic type binding Embedded high level data structure Garbage collection

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Python

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  1. Python 20021080 Hyunjong Lee

  2. contents • Introduction • Syntax & data types • Tools • Python as CGI

  3. Introduction • Developed by Guido Van Rossum in 1990 • Interpret based language • Has simple syntax • Dynamic type binding • Embedded high level data structure • Garbage collection • Module structure (glue language) • Fast development cycle

  4. Syntax • Syntax is very simple • Similar to most of other languages • Indentation sensitive

  5. High level built-in data types • Complex number • List (can be nested) • Tuples • Dictionary

  6. Tools • Py2exe – convert python script into exe file • Python2c – convert python script into C source file • SWIG(simplified wrapper and interface generator) – glue code generator

  7. Python as CGI • #!/usr/bin/python import cgi #import CGI module print "Content-Type: text/plain\n\n" The_Form = cgi.FieldStorage() for name in The_Form.keys(): print "Input: " + name print " value: " + The_Form[name].value + “\n” print "Finished!“ • <form name="form" method="get" action="http://sid.redfeel.net/~rene/cgi-bin/test.py"><p>email:<input type="text" name="email"> name:<input type="text" name="name"><input type="submit" value=“Run"></p></form>

  8. Python as CGI • template.html <html> <head> <META NAME="keywords" CONTENT="blah blah -- your ad here“> <title>Python is Fun!</title> </head> <body> <!--INSERT CONTENT HERE--> </body> </html>

  9. Python as CGI • #!/usr/bin/python import re #import regular expression module import cgi TemplateFile = "template.html" # Display function def def Display(Content): fp = open(TemplateFile, "r") TemplateInput = fp.read() #open & read entire file fp.close() BadTemplateException = “problem in template file" SubResult = re.subn("<!--INSERT CONTENT HERE-->", Content,TemplateInput) if SubResult[1] == 0: raise BadTemplateException print "Content-Type: text/html\n\n“ print SubResult[0] #make dynamic contents here …

  10. Python as CGI • import MySQLdb # import SQL module connection = MySQLdb.connect(user=‘uuu', passwd=‘ppp', db=‘db') cursor = connection.cursor() cursor.execute(“SELECT * FROM some_table”) cursor.close()

  11. References • http://www.python.or.kr/

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