introduced a base folder

grum.py

@@ -3,9 +3,9 @@
 import sys
 from PyQt5.QtWidgets import QApplication
 
-import ctrl_c
-import theme
-from mainwin import MainWindow
+from grum import ctrl_c
+from grum import theme
+from grum.mainwin import MainWindow
 
 
 app = QApplication(sys.argv)

grum/exampledata.py

@@ -1,5 +1,5 @@
 import numpy as np
-from plotdesc import PlotDescription
+from .plotdesc import PlotDescription
 
 
 X = np.arange(100) / 10

grum/mainwin.py

@@ -1,13 +1,13 @@
 from PyQt5.QtCore import Qt, pyqtSignal
 from PyQt5.QtWidgets import QMainWindow, QSplitter
 
-import assets
-from dictlist import DictList
-from mdiarea import MDIArea
-from mdisubplot import MDISubPlot
-from rpcserverthread import RPCServerThread
-from plotdesc import PlotDescription
-from exampledata import exampledata
+from . import assets
+from .dictlist import DictList
+from .mdiarea import MDIArea
+from .mdisubplot import MDISubPlot
+from .rpcserverthread import RPCServerThread
+from .plotdesc import PlotDescription
+from .exampledata import exampledata
 
 
 class MainWindow(QMainWindow):

grum/mdiarea.py

@@ -1,8 +1,8 @@
 from PyQt5.QtWidgets import QMdiArea, QAction
 from PyQt5.QtGui import QPainter
 
-import assets
-from theme import MDI_BKG
+from . import assets
+from .theme import MDI_BKG
 
 
 class MDIArea(QMdiArea):

grum/mdisubplot.py

@@ -1,7 +1,7 @@
 from PyQt5.QtCore import Qt
 from PyQt5.QtWidgets import QMdiSubWindow
 import pyqtgraph as pg
-import assets
+from . import assets
 
 
 class MDISubPlot(QMdiSubWindow):

grum/plotdesc.py

@@ -1,4 +1,4 @@
-from theme import pg_plot_style
+from .theme import pg_plot_style
 
 
 class PlotDescription:

grum/rpcserverthread.py

@@ -1,6 +1,6 @@
 import atexit
 from threading import Thread
-from rpcserver import RPCServer
+from .rpcserver import RPCServer
 
 
 class RPCServerThread(Thread):