Python-如何在不引用的情况下使用 csv.writer

Question

我有一个列表，其内容必须写入 csv 文件，不带引号。

列表内容如下：

list=[(1, 2, 1), (1, 3, 1), (1, 4, 1), (1, 5, 1), (2, 1, 1), (2, 3, 1), (2, 4, 1), (2, 5, 1), (3, 1, 1), (3, 2, 1), (3, 4, 1), (3, 5, 1), (4, 1, 1), (4, 2, 1), (4, 3, 1), (4, 5, 1), (5, 1, 1), (5, 2, 1), (5, 3, 1), (5, 4, 1)]

现在我有以下两个代码 sn-p 尝试将此列表写入 csv 文件：

方法一：

定义方法1()：

list=[(1, 2, 1), (1, 3, 1), (1, 4, 1), (1, 5, 1), (2, 1, 1), (2, 3, 1), (2, 4, 1), (2, 5, 1), (3, 1, 1), (3, 2, 1), (3, 4, 1), (3, 5, 1), (4, 1, 1), (4, 2, 1), (4, 3, 1), (4, 5, 1), (5, 1, 1), (5, 2, 1), (5, 3, 1), (5, 4, 1)]
myfile = open('output.csv', 'w')
        wr = csv.writer(myfile, quoting = csv.QUOTE_NONE, delimiter=',', escapechar=',')
        wr.writerow(list)

csv文件内容如下：

(1,, 2,, 1),(1,, 3,, 1),(1,, 4,, 1),(1,, 5,, 1),(2,, 1,, 1),(2,, 3,, 1),(2,, 4,, 1),(2,, 5,, 1),(3,, 1,, 1),(3,, 2,, 1),(3,, 4,, 1),(3,, 5,, 1),(4,, 1,, 1),(4,, 2,, 1),(4,, 3,, 1),(4,, 5,, 1),(5,, 1,, 1),(5,, 2,, 1),(5,, 3,, 1),(5,, 4,, 1)

我不希望列表元素之间的“，”。如果我从上面的代码中删除了 escapechar，它会抛出一个错误。

错误是：

_csv.Error：需要转义，但没有设置转义符

方法二：

定义方法2（）：

list=[(1, 2, 1), (1, 3, 1), (1, 4, 1), (1, 5, 1), (2, 1, 1), (2, 3, 1), (2, 4, 1), (2, 5, 1), (3, 1, 1), (3, 2, 1), (3, 4, 1), (3, 5, 1), (4, 1, 1), (4, 2, 1), (4, 3, 1), (4, 5, 1), (5, 1, 1), (5, 2, 1), (5, 3, 1), (5, 4, 1)]
myfile = open('output.csv', 'wb')
        wr = csv.writer(myfile)
        wr.writerow(list)

方法2的输出如下图：

"(1, 2, 1)","(1, 3, 1)","(1, 4, 1)","(1, 5, 1)","(2, 1, 1 )","(2, 3, 1)","(2, 4, 1)","(2, 5, 1)","(3, 1, 1)","(3, 2, 1 )","(3, 4, 1)","(3, 5, 1)","(4, 1, 1)","(4, 2, 1)","(4, 3, 1 )","(4, 5, 1)","(5, 1, 1)","(5, 2, 1)","(5, 3, 1)","(5, 4, 1 )"

有人可以帮我解决这个问题吗？

我的输出文件的内容必须是这样的：

(1, 2, 1), 
(1, 3, 1), 
(1, 4, 1), 
(1, 5, 1),

...
...

Answer 1

你根本不需要 csv，看看这个：

>>> list=[(1, 2, 1), (1, 3, 1), (1, 4, 1), (1, 5, 1), (2, 1, 1), (2, 3, 1), (2, 4, 1), (2, 5, 1), (3, 1, 1), (3, 2, 1), (3, 4, 1), (3, 5, 1), (4, 1, 1), (4, 2, 1), (4, 3, 1), (4, 5, 1), (5, 1, 1), (5, 2, 1), (5, 3, 1), (5, 4, 1)]
>>> with open('out.txt', 'w') as out:
...     for t in list:
...         out.write(str(t)+",\n")
... 
>>> 
host:~$ head out.txt 
(1, 2, 1),
(1, 3, 1),
(1, 4, 1),
(1, 5, 1),
(2, 1, 1),
(2, 3, 1),
(2, 4, 1),
(2, 5, 1),
(3, 1, 1),
(3, 2, 1),

Answer 2

您描述的格式似乎不需要csv 模块。您可以使用以下内容写出格式：

list=[(1, 2, 1), (1, 3, 1), (1, 4, 1), (1, 5, 1), (2, 1, 1), (2, 3, 1), (2, 4, 1), (2, 5, 1), (3, 1, 1), (3, 2, 1), (3, 4, 1), (3, 5, 1), (4, 1, 1), (4, 2, 1), (4, 3, 1), (4, 5, 1), (5, 1, 1), (5, 2, 1), (5, 3, 1), (5, 4, 1)]

with open("output.csv", "w") as out_f:
    for item in list:
        output_str = "{},\n".format(item)
        out_f.write(output_str)