演習3 import math f = open('ex12.txt','r') g = open('ex10.txt','w') text = f.readlines() print(text) j = int(math.log10(len(text)))+1 i = 0 for lines in text: g.write(str(i).zfill(j)+lines) print(lines) i += 1 f.close() g.close() 演習5 略 …