修改python模块引用方式

pyat/krakenc.py

@@ -1,8 +1,8 @@
 from os import system
 import numpy as np
-from pyat.readwrite import write_env, write_fieldflp, read_shd
-from pyat.env import Pos, Source, Dom, cInt, SSPraw, SSP, HS, BotBndry, TopBndry, Bndry
-from pyat.config import AtBinPath
+from readwrite import write_env, write_fieldflp, read_shd
+from env import Pos, Source, Dom, cInt, SSPraw, SSP, HS, BotBndry, TopBndry, Bndry
+from config import AtBinPath
 
 def calZmax(ssp, sed):
     d = np.array([])