What is the difference between [] and {}?

Question

for example :
res = {}
ids = []
So what is the difference in these two?
Thanks in advance

Andre de Kock · Accepted Answer

Yes, the previous comment is correct.
res = {} is a *dictionary*
ids = [] is a *list*
Dictionaries have keys and values, stored like this:
res = {
'key1': 'value1',
'key2': 'value2',
}
print res['key1'] # This will print "value1"
print res['key2'] # This will print "value2"
Lists have only indices and values, stored like this:
ids = ['this', 'that', 'foo', 'bar']
print ids[0] # This will print "this"
print ids[1] # This will print "that"
print ids[2] # This will print "foo"
print ids[3] # This w

Turkesh Patel · Answer

this is the data concept of python list and dictionary https://docs.python.org/2/tutorial/datastructures.html

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