Introduction
Recipe 3.1.
Calculating Yesterday and Tomorrow
Recipe 3.2.
Finding Last Friday
Recipe 3.3.
Calculating Time Periods in a Date Range
Recipe 3.4.
Summing Durations of Songs
Recipe 3.5.
Calculating the Number of Weekdays Between Two Dates
Recipe 3.6.
Looking up Holidays Automatically
Recipe 3.7.
Fuzzy Parsing of Dates
Recipe 3.8.
Checking Whether Daylight Saving Time Is Currently in Effect
Recipe 3.9.
Converting Time Zones
Recipe 3.10.
Running a Command Repeatedly
Recipe 3.11.
Scheduling Commands
Recipe 3.12.
Doing Decimal Arithmetic
Recipe 3.13.
Formatting Decimals as Currency
Recipe 3.14.
Using Python as a Simple Adding Machine
Recipe 3.15.
Checking a Credit Card Checksum
Recipe 3.16.
Watching Foreign Exchange Rates