修改python模块引用方式

pyat/readwrite.py

@@ -2,7 +2,7 @@ import numpy as np
 from scipy.io import loadmat
 import os
 from struct import unpack
-from pyat.env import Source, Dom, Pos, cInt, Ice, SSPraw, SSP, HS, BotBndry, TopBndry, Bndry, Box, Beam, Modes, Eigenray
+from env import Source, Dom, Pos, cInt, Ice, SSPraw, SSP, HS, BotBndry, TopBndry, Bndry, Box, Beam, Modes, Eigenray
 import re
 from matplotlib import pyplot as plt
 from math import floor