Python tutorial
| method | description |
| clear | removes all elements |
| count | does shallow-copy |
| append | |
| copy | gets value for a given key |
| extend | returns set, where each element in the set is a tuple,each tuple has key and value pair |
| index | returns keys |
| insert | removes element for a given key |
| remove | removes last element in the dictionary, i.e last key-value pair |
| reverse | |
| sort |