您在第一次迭代时读取整个文件,因此第二次没有任何内容可供阅读.由于您第二次似乎没有使用csv数据,因此计算行数并在第二次迭代该范围会更简单.

import csv

from itertools import count

with open('MySpreadsheet.csv', 'rU') as f:

reader = csv.DictReader(f, dialect=csv.excel)

row_count = count(1)

for row in reader:

next(count)

print(row)

for i in range(row_count):

print('Stack Overflow')

如果您需要再次遍历原始csv数据,则再次打开文件很简单.最有可能的是,您应该迭代第一次存储的某些数据,而不是再次读取文件.

with open('MySpreadsheet.csv', 'rU') as f:

reader = csv.DictReader(f, dialect=csv.excel)

for row in reader:

print(row)

with open('MySpreadsheet.csv', 'rU') as f:

reader = csv.DictReader(f, dialect=csv.excel)

for row in reader:

print('Stack Overflow')

如果您不想再次打开文件,可以查找开头,跳过标题,然后再次迭代.

with open('MySpreadsheet.csv', 'rU') as f:

reader = csv.DictReader(f, dialect=csv.excel)

for row in reader:

print(row)

f.seek(0)

next(reader)

for row in reader:

print('Stack Overflow')