python-删除文件的特定行
def removeLine(filename, lineno): fro = open(filename, "r",encoding='UTF-8')current_line = 0
while current_line < lineno:
fro.readline()
current_line += 1
seekpoint = fro.tell()
frw = open(filename, "r+")
frw.seek(seekpoint, 0)
# read the line we want to discard
fro.readline()# 读入一行进内存 ，同时 文件指针下移实现删除
# now move the rest of the lines in the file
# one line back
chars = fro.readline()
while chars:
frw.writelines(chars)
chars = fro.readline()
fro.close()
frw.truncate()
frw.close()
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