所以我有两个csv文件。 Book1.csv的数据多于similarities.csv，因此我想提取Book1.csv similarities.csv中{strong} 出现的行 with open('Book1.csv', 'rb') as csvMasterForDiff:
with open('similarities.csv', 'rb') as csvSlaveForDiff:
masterReaderDiff = csv.reader(csvMasterForDiff)
slaveReaderDiff = csv.reader(csvSlaveForDiff)
testNotInCount = 0
testInCount = 0
for row in masterReaderDiff:
if row not in slaveReaderDiff:
testNotInCount = testNotInCount + 1
else :
testInCount = testInCount + 1
print('Not in file: '+ str(testNotInCount))
print('Exists in file: '+ str(testInCount))
到目前为止我有什么
Not in file: 2093
Exists in file: 0
然而，结果是
Book1.csv我知道这是不正确的，因为similarities.csv中至少$(document).ready(function() {
$(" a .follow").click(function() {
var thiss = $(this);
var state = thiss.attr("data-state");
var id = thiss.attr("id");
var follow = thiss.attr("data-follow");
alert(value + id + flag);
$.post("<?php echo base_url()?>profile/insert_follow", {
state: state,
id: id,
follow: follow
}, function(data) {
if (thiss.hasClass("follow")) {
var abc = "<a class="btn btn-info btn-follow unfollow" data-state="2" data-follow="<? php echo $artist_info - > id ?>" data-id="<? php echo $this->session->userdata('username') ?>">Following</a>";
thiss.append(abc);
}
elseif(thiss.hasClass("unfollow")) {
var abc1 = "<a class="btn btn-info btn-follow follow" data-state="2" data-follow=" <? php echo $artist_info->id ?> " data-id=" <? php echo $this->session->userdata('username') ?> ">Follow</a>";
thiss.append(abc1);
}
$('.followers').children('span').html(data);
});
});
});
中的前16个条目不存在于public function insert_follow(){
$id=$_POST['id'];
$follows = $_POST['follows'];
$state = $_POST['state'];
$data1=array(
'id'=>$id,
'follows' =>$follows,
'state' =>$state
);
$query=$this->hbmodel->follow_artist($data1);
}
中。我做错了什么？
答案 0 :(得分：1)
csv.reader对象是迭代器，这意味着您只能迭代一次。您应该使用列表/集进行包含检查，例如：
slave_rows = set(slaveReaderDiff)
for row in masterReaderDiff:
if row not in slave_rows:
testNotInCount += 1
else:
testInCount += 1
答案 1 :(得分：0)
将其转换为sets后，您可以执行大量set相关＆amp;无需编写大量代码即可进行有用的操作。
slave_rows = set(slaveReaderDiff)
master_rows = set(masterReaderDiff)
master_minus_slave_rows = master_rows - slave_rows
common_rows = master_rows & slave_rows
print('Not in file: '+ str(len(master_minus_slave_rows)))
print('Exists in file: '+ str(len(common_rows)))
以下是您可以执行的各种set operations。