A Python Tutorial

Feb 11, 20122 likes837 views

Presentation used for tutorial session on Python for finalists of CSEA Code Maestros on Feb 11, 2012. More resources at http://athena.nitc.ac.in/~k4rtik/python/

A Python Tutorial

Computer Science and
Engineering Association

NIT Calicut

Code Maestros

Contents

● Why Python?
● Interpreter Fun
● Live Demo
● Scripts
● Examples and QA
● Python in...
● References
● License and Sharing Info

Why Python?

● Popular
● Open Source
● Cross Platform
● Easy to learn
● Forces the programmer to write readable code
● General purpose - used almost everywhere from games
to robotics

Interpreter Fun
● Python interpreter - good for little experiments
● read-eval-print loop
● No need to declare variables
● Variables don't have types, but values do

k4rtik@PlatiniumLight ~ $ python
Python 2.7.2+ (default, Oct 4 2011, 20:06:09)
[GCC 4.6.1] on linux2
Type "help", "copyright", "credits" or
"license" for more information.
>>>

Scripts (like bash!)
#!/usr/bin/python
import sys
a = 123
def cat(filename):
"""Given filename, print its text contents."""
print filename, '======='
f = open(filename, 'r')

for line in f:
print line,
f.close()

Continues...

def main():
args = sys.argv[1:]
for filename in args:
if filename == 'voldemort'or filename == 'vader':
print 'this file is very worrying'
cat(filemane, 123, bad_variable)
else:
cat(filename)
print 'all done'

if __name__ == '__main__':
main()

Python in...

● Web
○ Django, ZOPE, WebPy, TurboGears
● Scientific Computing
○ NumPy, SAGE
● GUI Development
○ PyGtk, PyQt
● Game Dev
○ PyGame
● Network Programming
○ Twisted

References

● Python in One Easy Lesson - http://www-cs-faculty.
stanford.edu/~nick/python-in-one-easy-lesson/
● Google's Python Class - http://code.google.
com/edu/languages/google-python-class/index.html

License and Sharing Info

This work by CSEA, NIT Calicut is licensed under a Creative
Commons Attribution-NonCommercial 2.5 India License.

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A Python Tutorial

1. A Python Tutorial Computer Science and Engineering Association NIT Calicut Code Maestros

2. Contents ● Why Python? ● Interpreter Fun ● Live Demo ● Scripts ● Examples and QA ● Python in... ● References ● License and Sharing Info

3. Why Python? ● Popular ● Open Source ● Cross Platform ● Easy to learn ● Forces the programmer to write readable code ● General purpose - used almost everywhere from games to robotics

4. Interpreter Fun ● Python interpreter - good for little experiments ● read-eval-print loop ● No need to declare variables ● Variables don't have types, but values do k4rtik@PlatiniumLight ~ $ python Python 2.7.2+ (default, Oct 4 2011, 20:06:09) [GCC 4.6.1] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>>

5. Live demo

6. Scripts (like bash!) #!/usr/bin/python import sys a = 123 def cat(filename): """Given filename, print its text contents.""" print filename, '=======' f = open(filename, 'r') for line in f: print line, f.close()

7. Continues... def main(): args = sys.argv[1:] for filename in args: if filename == 'voldemort'or filename == 'vader': print 'this file is very worrying' cat(filemane, 123, bad_variable) else: cat(filename) print 'all done' if __name__ == '__main__': main()

8. Examples and QA

9. Python in... ● Web ○ Django, ZOPE, WebPy, TurboGears ● Scientific Computing ○ NumPy, SAGE ● GUI Development ○ PyGtk, PyQt ● Game Dev ○ PyGame ● Network Programming ○ Twisted

10. References ● Python in One Easy Lesson - http://www-cs-faculty. stanford.edu/~nick/python-in-one-easy-lesson/ ● Google's Python Class - http://code.google. com/edu/languages/google-python-class/index.html

11. License and Sharing Info This work by CSEA, NIT Calicut is licensed under a Creative Commons Attribution-NonCommercial 2.5 India License.

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