Given a Dictionary with keys and values that are lists, the following program displays key of the value whose range in maximum.

Range = Maximum number-Minimum number

Input: test_dict = {“Gfg” : [6, 2, 4, 1], “is” : [4, 7, 3, 3, 8], “Best” : [1, 0, 9, 3]}Output: BestExplanation: 9 – 0 = 9, Maximum range compared to all other list given as valuesInput: test_dict = {“Gfg” : [16, 2, 4, 1], “Best” : [1, 0, 9, 3]}Output: GfgExplanation: 16 – 1 = 15, Maximum range compared to all other list given as values

**Method 1 :**** **Using *max()**, **min()** and **loop *

In this, we get max() and min() of each list and perform difference to find range. This value is then stored and max difference of all such values is computed by applying max() at the result list.

## Python3

`# initializing dictionary` `test_dict ` `=` `{` `"Gfg"` `: [` `6` `, ` `2` `, ` `4` `, ` `1` `], ` `"is"` `: [` `4` `, ` `7` `, ` `3` `, ` `3` `, ` `8` `], ` `"Best"` `: [` `1` `, ` `0` `, ` `9` `, ` `3` `]}` ` ` `# printing original dictionary` `print` `(` `"The original dictionary is : "` `+` `str` `(test_dict))` ` ` `max_res ` `=` `0` `for` `sub, vals ` `in` `test_dict.items():` ` ` ` ` `# storing maximum of difference` ` ` `max_res ` `=` `max` `(max_res, ` `max` `(vals) ` `-` `min` `(vals)) ` ` ` `if` `max_res ` `=` `=` `max` `(vals) ` `-` `min` `(vals):` ` ` `res ` `=` `sub` ` ` `# printing result ` `print` `(` `"The maximum element key : "` `+` `str` `(res)) ` |

**Output:**

The original dictionary is : {‘Gfg’: [6, 2, 4, 1], ‘is’: [4, 7, 3, 3, 8], ‘Best’: [1, 0, 9, 3]}

The maximum element key : Best

**Method 2 : ***Using **list comprehension**, **max()** and **min() *

In this, we compute the maximum range, and then extract the key which matches that difference using list comprehension.

## Python3

`# initializing dictionary` `test_dict ` `=` `{` `"Gfg"` `: [` `6` `, ` `2` `, ` `4` `, ` `1` `], ` `"is"` `: [` `4` `, ` `7` `, ` `3` `, ` `3` `, ` `8` `], ` `"Best"` `: [` `1` `, ` `0` `, ` `9` `, ` `3` `]}` ` ` `# printing original dictionary` `print` `(` `"The original dictionary is : "` `+` `str` `(test_dict))` ` ` `# getting max value ` `max_res ` `=` `max` `([` `max` `(vals) ` `-` `min` `(vals) ` `for` `sub, vals ` `in` `test_dict.items()])` ` ` `# getting key matching with maximum value ` `res ` `=` `[sub ` `for` `sub ` `in` `test_dict ` `if` `max` `(test_dict[sub]) ` `-` `min` `(test_dict[sub]) ` `=` `=` `max_res][` `0` `]` ` ` `# printing result ` `print` `(` `"The maximum element key : "` `+` `str` `(res)) ` |

**Output:**

The original dictionary is : {‘Gfg’: [6, 2, 4, 1], ‘is’: [4, 7, 3, 3, 8], ‘Best’: [1, 0, 9, 3]}

The maximum element key : Best

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