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1. PYTHON PROGRAMMING COURSE

2. OVERVIEW OF PYTHON
•Python is a general-purpose, object-
oriented programming language with
high-level programming capabilities. It
has become famous because of its
apparent and easily understandable
syntax, portability, and easy to learn.

3. INSTALLING
• Python is pre-installed on most Unix systems, including Linux and
MAC OS X
• The pre-installed version may not be the most recent one (2.6.2 and
3.1.1 as of Sept 09)
• Download from http://python.org/download/
• Python comes with a large library of standard modules
• There are several options for an IDE
• IDLE – works well with Windows
• Emacs with python-mode or your favorite text editor
• Eclipse with Pydev (http://pydev.sourceforge.net/)

4. ASSIGHNMENT
• Binding a variable in Python means setting a name to hold a reference to some object
• Assignment creates references, not copies
• Names in Python do not have an intrinsic type, objects have types
• Python determines the type of the reference automatically based on what data is assigned
to it
• You create a name the first time it appears on the left side of an assignment expression:
x = 3
• A reference is deleted via garbage collection after any names bound to it have passed out
of scope
• Python uses reference semantics (more later)

5. NAMING CONVENTIONS
The Python community has these recommend-ed naming conventions
•joined_lower for functions, methods and, attributes
•joined_lower or ALL_CAPS for constants
•StudlyCaps for classes
•camelCase only to conform to pre-existing conventions
•Attributes: interface, _internal, __private

6. COMMENTS
• Start comments with #, rest of line is ignored
• Can include a “documentation string” as the first line of a new
function or class you define
• Development environments, debugger, and other tools use it: it’s
good style to include one
def fact(n):
“““fact(n) assumes n is a positive integer and
returns facorial of n.”””
assert(n>0)
return 1 if n==1 else n*fact(n-1)

7. WHAT IS PYTHON USED FOR?
• Python is commonly used for developing websites and software, task automation,
data analysis, and data visualization. Since it’s relatively easy to learn, Python has
been adopted by many non-programmers such as accountants and scientists, for a
variety of everyday tasks, like organizing finances.
• “Writing programs is a very creative and rewarding activity,” says University of
Michigan and Coursera instructor Charles R Severance in his book Python for
Everybody. “You can write programs for many reasons, ranging from making your
living to solving a difficult data analysis problem to having fun to helping someone
else solve a problem.”