Exam3 Topics
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Chapter 5: Functions
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Keyword Arguments
Global Variables and Global Constants
Generating Random Numbers
Value-Returning Functions
+ return keyword
The math Module
Storing Functions in Modules

Chapter 6: Files and Exceptions
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File input and output
Opening a file
File modes (and their consequences)
Reading from a file
Using a for loop to read lines from a file
Writing to a file
Determining the end of the file
Closing a file
Records and fields
Exceptions

Chapter 8: More about Strings
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String concatenation (using the + operator)
Accessing individual characters of a string
Strings are immutable
len() function
String slicing [ start : end : step ]
Testing strings with in and not in
String methods
    String testing methods:
        isalnum()
        isalpha()
        isdigit()
        islower()
        isspace()
        isupper()
    String modification methods:
        lower()
        lstrip()
        lstrip( char )
        rstrip()
        rstrip( char )
        upper()
    String searching and replacing methods:    
        startswith( substring )
        endswith( substring )
        find( substring)
        replace( substring, newString )
Repetition operator (*)
Splitting a string (with split())