python删除csv文件某一行

下面是我将如何处理这个问题，但这可能不是最好的方法。在from datetime import datetime

dateranges = [("01-01-1951","12-31-1951"),("07-01-1962","12-31-1962")]

dateranges = list(map(lambda dr: tuple(map(lambda x: datetime.strptime(x,"%m-%d-%Y"),dr)),dateranges))

def datefilter(x):

# The date format is different here to match the format of the csv

x = datetime.strptime(x,"%Y-%m-%d")

for r in dateranges:

if r[0]=x: return True

return False

with open(main_file, "rb") as fp:

root = csv.reader(fp, delimiter='\t')

result = collections.defaultdict(list)

for row in root:

if datefilter(row[3]):

# use a regular expression or any other means to filter on id here

if row[2].startswith("dd:111"): #code to remove item

我所做的是创建一个日期范围元组的列表（为了简洁起见，我只在其中放了2个范围）