I need to use Python to establish a key-value program similar to MapReduce on Hadoop.

• How to establish a dictionary (also called an associative array) that contains at least 50 values. An example of a key may be state and value as capital. Another example may be number in an alphabet and letter in an alphabet.
• How the script can use a command that enumerates the contents of key-values in the dictionary.
• How the script can use a command that lists all keys.
• How the script can use a command that lists all values.
• How the script can use a command that replaces key number "1" with a new value.