Python函数看不到导入的模块

Question

试图将 csv 读入列表。代码如下：import csvwith open('file.csv','r') as fin:    reader = csv.reader(fin)    mylist = list(reader)print (mylist)def gen_list():    with open('file.csv','r') as fin:        reader = csv.reader(fin)        mylist = list(reader)    print (mylist)def main():    gen_list()    return 0我的输出是：[['one','two','three']]Traceback():....line 11, in gen_listreader = csv.reader(fin)AttributeError: 'str' object has no attribute 'reader'我可以通过将“import csv”作为 gen_list 函数的第一行来防止发生此错误。为什么代码在放在函数中时不起作用？

Answer 1

原来我偶然在另一个函数中使用了 csv。一旦我更改了 csv，问题就消失了

功能：

def get_list(csv):

    with open(csv,'rt') as fin:

        for line in fin:

            drList.append(gen_list(line))

        return (drList)

Answer 2

试试这个：

import csv

with open('file.csv','r') as fin:

    reader = csv.reader(fin)

    mylist = list(reader)

print (mylist)

def gen_list():

    with open('file.csv','r') as fin:

        reader = csv.reader(fin)

        mylist = list(reader)

    print (mylist)

def main():

    gen_list()

    return 0

看来，缩进reader的内open内gen_list是错误的