with open("file.txt", "r") as old_file: with open("file.txt", "r+") as new_file: current_line = 0 # 定位到需要刪除的行 while current_line < (del_line - 1): old_file.readline() current_line += 1 # 當前游標在被刪除行的行首，記錄該位置 seek_point = old_file.tell() # 設定游標位置 new_file.seek(seek_point, 0) # 讀需要刪除的行，游標移到下一行行首 old_file.readline() # 被刪除行的下一行讀給 next_line next_line = old_file.readline() # 連續覆蓋剩餘行，後面所有行上移一行 while next_line: new_file.write(next_line) next_line = old_file.readline() # 寫完最後一行後截斷檔案，因為刪除操作，檔案整體少了一行，原檔案最後一行需要去掉 new_file.truncate()

import os

DELNUM=12

i=1

openFileHandle=open("filename","r")

writeFileHandle=open("Temp","w")

while 1:

line=openFileHandle.readline()

if line:

if i

i=i+1

print "找到%d行：%s"%(DELNUM,line)

continue

else:

i=i+1

writeLine="%s\n"%line

writeFileHandle.write(writeLine)

else:

print "匹配%d行失敗，檔案已到末尾"%DELNUM

break

openFileHandle.close()

writeFileHandle.close()

os.remove("filename")

os.rename("Temp","filename")

print "All Done!"