As the title says, this is a Python dictionary quick guide.
Please check out the Dictionary Tutorial for more articles about dictionaries.
- What is a Dictionary in Python?
- Python Programming – Creation, Initialization and Accessing The Elements In A Dictionary
- How to Sort Python Dictionaries by Key or Value
# key/value pairs declaration
dict = {
‘key1′:’value1′,
‘key2′:’value2′,
‘key3′:’value3′
}
#Get all keys
dict.keys()
#Get all values
dict.values()
#Modifying
dict['key2'] = ‘value8′
#Accessing
print dict['key1']
# prints ‘value2′
print dict['key2']
# empty declaration + assignment of key-value pair
emptyDict = {}
emptyDict['key4']=’value4′
# looping through dictionaries (keys and values)
for key in dict:
print dict[key]
# sorting keys and accessing their value in order
keys = dict.keys()
keys.sort()
for key in keys:
print dict[key]
# looping their values directory (not in order)
for value in dict.values():
print value
# getting both the keys and values at once
for key,value in dict.items():
print “%s=%s” % (key,value)
# deleting an entry
del dict['key2']
# delete all entries in a dictionary
dict.clear()
# size of the dictionary
len(dict)