In this hangout we will be talking about: 1-Files 2-Functional Programming 3-Passing arguments to your command line

1. Python
45
Minutes
By @AlSayed Gamal

2. Last Hangout
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Data types and containers
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Functions
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Exceptions
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Namespaces and modules
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Re-read the sorted list example.

3. In This Hangout
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Working with files
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Reading options passed to your program
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Functional programming
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Advanced iteration
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Debugging tools

4. Working With Files

5. Working With Files
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What’s simpler than open(“path/to/file”) ?
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Don’t forget to close the file (finally:)
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And even cleaner way use managed context (with:)
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File-like objects.

6. Reading CL Options

7. Reading Options
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from optparse import OptionParser
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Adding options (short and long), setting default values and
errors
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using __main__ the entry point.

8. Functional Programming

9. Functional Programing
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Python is a multi-paradigm language (What does that
mean?)
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Functions are objects and they are first class variables.
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Higher order functions
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Remember the first hangout example ?

10. Functional Programing (2)
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Anonymous functions (lambda)
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Nested functions (function that defines function)
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Closures and “Lexical Scoping” issue.
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Operators as functions
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Trying doctest.
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Decorators and (@notation).

11. Advanced Iteration

12. Advanced Iteration
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List comprehension
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Generator expressions
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Understanding yield
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itertools
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zip and izip

13. Questions?

14. Thank you :)
@AlSayed Gamal