Shortest distance in a line

# Table: Point
# 
# +-------------+------+
# | Column Name | Type |
# +-------------+------+
# | x           | int  |
# +-------------+------+
# In SQL, x is the primary key column for this table.
# Each row of this table indicates the position of a point on the X-axis.
# 
#  
# 
# Find the shortest distance between any two points from the Point table.
# 
# The result format is in the following example.
#
# Example 1:
# Input:
# Point table:
# +----+
# | x  |
# +----+
# | -1 |
# | 0  |
# | 2  |
# +----+
# Output:
# +----------+
# | shortest |
# +----------+
# | 1        |
# +----------+
# Explanation: The shortest distance is between points -1 and 0 which is |(-1) - 0| = 1.

import pandas as pd

def shortest_distance(point: pd.DataFrame) -> pd.DataFrame:
  sorted_x = point['x'].sort_values().reset_index(drop=True)
  diffs = sorted_x.diff().dropna().abs()
  return pd.DataFrame({'shortest': [diffs.min()]})