import sys
newCode = []
fileName = raw_input("podaj nazwe pliku")
try:
    with open(fileName, 'r') as data:
        for layer_number, layer in enumerate(data):
            newCode.append(layer);
            if (layer.strip() == "T1" or layer.strip() == "T0"):
                newCode[layer_number] += '\nG91 \nG0 Z2\nG90 \n'
            if ('M109' in layer and layer_number > 40):
                newCode[layer_number] += '\nG91 \nG0 Z-2 \nG90\n'
    newStr =''
    print "w8 ziomek"
    for line in newCode:
        newStr +=line
    newFileName = fileName.split('.')[0]+'_modified.'+fileName.split('.')[1]
    with open(newFileName, 'w+') as wfile:
        wfile.write(newStr)
    print "spoko oko zapisane"
except:
    print("Unexpected error:", sys.exc_info()[0])
raw_input()