ITP DWD Week 2 - Dictionary Example

dictionary_example.py

# create a dictionary
# mydict = { key1:value1, key2:value2 }
mission_dates = {
	'Gemini 3' : '23 March 1965',
	'Gemini 10' : '18-21 July 1966',
	'Apollo 10' : '18-26 May 1969',
	'Apollo 16' : '16-27 April 1972 ',
	'STS-1' : '12-14 April 1981',
	'STS-9' : '28 November - 6 December 1983'
}

# print the date of Apollo 16 mission
print "\n***** access dictionary with [key] *****"
print mission_dates['Apollo 16']

# Suggested way to retrieve key from dictionary.   .get() provides a default value
print "\n***** .get() *****"
print mission_dates.get('Apollo 16')

# retrieve a list of all dictionary keys
print "\n***** .keys() *****"
print mission_dates.keys()

# retrieve a list of all dictionary values
print "\n***** .values() *****"
print mission_dates.values()

# print out the mission_dates with .items() --- will be a list of tuples
print "\n***** .items() *****"
print mission_dates.items()

# remove a item from dictionary by key
del mission_dates['STS-9']

# loop and print dictionary keys and values
print "\n***** Loop and Print *****"
for name, date in mission_dates.items():
	print name, "on", date