完成丢弃一行写入

print('HELLO GKOSON...')
path2 ="/Users/Gong Jin Hua/Desktop/Merge/2.txt"
path3 ="/Users/Gong Jin Hua/Desktop/Merge/3.txt"

count=0; 
f2 = open(path2)
lines = f2.readlines()
for line in lines:
	print (line)
	count += 1
f2.close()

print(count)
		
 
input("请输入：");

print('HELLO GKOSON...')
path2 ="/Users/Gong Jin Hua/Desktop/Merge/2.txt"
path3 ="/Users/Gong Jin Hua/Desktop/Merge/3.txt"

count1=0; 
count2=0;
f2 = open(path2)
lines = f2.readlines()
for line in lines:
	print (line)
	count1 += 1
f2.close()

print(count1)


f = open(path3, 'a')
for line in lines:	
	count2 += 1
	if count2 < count1 :
		print (count2)
		f.write(line)
f.close()
input("请输入：");