Question

我已经通过Django上传了一个CSV文件，我试图阅读它的第一行。该文件存储在服务器上

/tmp/csv_file/test.csv

该文件如下所示：

column_1,column_2,column_3
2175,294,Nuristan
2179,299,Sar-e-Pul

我试图得到文件的标题，如：

absolute_base_file = '/tmp/csv_file/test.csv'
csv_reader = csv.reader(absolute_base_file)
csv_headings = next(csv_reader)
print csv_headings

我只得到这个回报：

['/']

EDITED

CSV文件的权限是：

-rw-rw-r--

哪个应该没问题。

再次编辑

基于@EdChum和@Moses Koledoye的建议和帮助

我已使用以下方法检查文件是否正确读取：

print (os.stat(absolute_base_file).st_size) # returns 64

然后我试着看看seek（0）和csvfile.read（1）是否返回一个可打印的字符。

   print csvfile.seek(0) returns None
   print csvfile.read(1) returns 'c'

然后我想也许next（）函数存在一个特殊问题，我尝试了另一种选择：

csv_reader = csv.reader(csvfile) 
for row in csv_reader:   
   print ("csv_reader")

这再次没有用。

Answer 1

你传递了一个字符串而不是一个文件对象，这就是你得到斜杠的原因，改为：

 <?php
$servername = "localhost";
$username = "username";
$password = "password";

// Create connection
$conn = new mysqli($servername, $username, $password);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// Create database
$sql = "CREATE DATABASE myDB";
if ($conn->query($sql) === TRUE) {
    echo "Database created successfully";
} else {
    echo "Error creating database: " . $conn->error;
}

$conn->close();
?>

检查docs

看到这个工作：

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// sql to create table
$sql = "CREATE TABLE MyGuests (
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
firstname VARCHAR(30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
email VARCHAR(50),
reg_date TIMESTAMP
)";

if ($conn->query($sql) === TRUE) {
    echo "Table MyGuests created successfully";
} else {
    echo "Error creating table: " . $conn->error;
}

$conn->close();
?>

要连续访问每一行with open (absolute_base_file) as csvfile: csv_reader = csv.reader(csvfile)：

In [5]:
import csv
with open (r'c:\data\csv_test.csv') as csvfile:
    csv_reader = csv.reader(csvfile)
    csv_headings = next(csv_reader)
    print (csv_headings)

['column_1', 'column_2', 'column_3']

Answer 2

您应该将文件对象传递给csv.reader而不是字符串文字。

absolute_base_file = open(r'/tmp/csv_file/test.csv') # notice open
csv_reader = csv.reader(absolute_base_file)
csv_headings = next(csv_reader)
print csv_headings

试图读取CSV文件的第一行返回['/']

2 个答案: