Dictionaries - Python

varD = {key1: "value1", key2: "value2"} => Initialize a dictionary
- Ordered collection
- varD = {} => Initialize an empty dictionary
varD[key] = "value" => Update or Add a new value
- varD.update(varD1) => Appends varD1 into the dictionary
del varD => Deletes entire dictionary
- del varD[key] => Deletes key-value pair
- varD.clear() => Clears all the elements from the dictionary
- varName = varD.pop(key) => Removes and Return the given key-value pair
- varName = varD.popItem() => Removes and Return the last key-value pair
varD[key] => Returns values of that key if present else returns error
- varD.get(key) => Returns values of that key if present else returns "none"
- varD.keys() => Returns all the keys
- varD.values() => Returns all the values
- varT = varD.items() => Returns all the pairs as a sequence of (key,value) tuples in random order
- Loop in the dictionary
```
    for key in varD.keys():
        print(key) # Prints all the keys
        print(varD[key]) # Prints all the values
    for key, value in varD.items():
        print(key) # Prints all the keys
        print(value) # Prints all the values
```
len(varD) => Gives the count of pairs
varD2 = varD1.copy() => Creates a copy of varD1 into variable varD2