First push

excellon.py

+import Tkinter as tk
+
+class Excellon(file):
+
+    def __init__(self, file):
+        self.header = []
+        self.drills = {}
+        row_index = 0
+        while row_index < len(file):
+            if file[row_index].startswith('M48'):
+                row_index += 1
+                while not file[row_index].startswith('%'):
+                    self.header.append(file[row_index].replace('\n', ''))
+                    row_index += 1
+
+            if file[row_index].startswith('T'):
+                toolNumber = file[row_index].replace('\n', '').replace('\r', '')
+                self.drills[toolNumber] = []
+                row_index += 1
+                while row_index < len(file) and not file[row_index].startswith('T') and not file[row_index].startswith('M30'):
+                    self.drills[toolNumber].append(file[row_index].replace('\n', '').replace('\r', ''))
+                    row_index += 1
+
+            else:
+                row_index += 1
+
+
+class GcodeISO:
+
+    def __init__(self, excellonFile, parameters):
+        self.units, self.zSafe, self.zDepth, self.inCutFeed = parameters
+        self.header = ['G17 G40 G54 G64  G90 ']
+        if self.units.get() == 'mm':
+            self.header.append('G21\n')
+        elif self.units.get() == 'inch':
+            self.header.append('G20\n')
+        else:
+            self.header.append('\n')
+        self.body = []
+        for tool in excellonFile.drills:
+            self.body.append(tool + ' M6\n')
+            self.body.append('G0 Z' + str(self.zSafe) + '\n')
+            for hole in excellonFile.drills[tool]:
+                self.body.append('G98 G81 ' + hole.replace('Y', ' Y') + ' Z-' + str(self.zDepth) + ' R' + str(self.zSafe) + ' F' + str(self.inCutFeed) + '\n')
+
+            self.body.append('G80\n')
+
+        self.body.append('M30\n')
+
+    def toText(self):
+        return self.header + self.body
+
+
+def excellonToGcode(file, parameters):
+    with open(file, 'r') as f:
+        file = f.readlines()
+        excellonFile = Excellon(file)
+        gcodeFile = GcodeISO(excellonFile, parameters)
+        return gcodeFile.toText()