通过将双引号添加到带空格的字符串中，将值写入python中的文件

Question

我正在尝试以特定方式在txt文件中写入以下列表的值

valList = ['1','Age',' Address has spaces','employee','98363','hobbies has space in it ']

sample.txt

1,Age,"Address has spaces",employee,98363,"hobbies has space in it "

在这里，如果您看到valList是一个异构列表，我的唯一意图是编写其中带有空格的值用双引号引起来的值，其余所有值都应照原样编写。 到目前为止，我已经尝试过：

valList = ['1','Age',' Address has spaces','employee','98363','hobbies has space in it ']
# Output = 1,Age,"Address has spaces",employee,98363,"hobbies has space in it "
valstr = ",".join(valList)
with open('sample.txt','wb') as file:
    file.write(valstr)
    file.write('\n' + " \"" + valList[2] + "\" ") 

使用file.write（'\\ n'+“ \\”“ + valList [2] +” \\“”）行，我可以用引号写一个值，但是我需要一种通用的方式来写带空格的值对于给定的列表。

任何帮助将不胜感激。

Answer 1

您有CSV数据 。 使用csv模块 ，它将在需要的地方自动使用引号：

import csv
valList = ['1', 'Age', ' Address has spaces', 'employee', '98363', 'hobbies has space in it ']
with open('sample.txt', 'wb') as file:
    writer = csv.writer(file)
    writer.writerow(valList)

这将根据需要引用值； 例如，当字段值中有逗号或换行符时。 这不太符合您的确切要求，但是兼容的CSV阅读器在读取时将能够再次从文件中获取完全相同的值。

如果必须在带空格的列上使用引号，则可以禁用自动引号并手动添加引号：

import csv
valList = ['1','Age',' Address has spaces','employee','98363','hobbies has space in it ']
with open('sample.txt', 'wb') as file:
    writer = csv.writer(file, quoting=csv.QUOTE_NONE, quotechar='')
    writer.writerow(['"{}"'.format(v) if ' ' in v else v for v in valList])

列表推导将值中带有空格的任何内容括在双引号中。 请注意，由于我们禁用了此处的引号 ，因此csv.writer()会拒绝其中包含逗号或换行符的值，因为它现在无法使用引号了。

两种方法的演示：

>>> import sys
>>> import csv
>>> valList = ['1', 'Age', ' Address has spaces', 'employee', '98363', 'hobbies has space in it ']
>>> writer = csv.writer(sys.stdout)
>>> writer.writerow(valList)
1,Age, Address has spaces,employee,98363,hobbies has space in it
>>> writer = csv.writer(sys.stdout, quoting=csv.QUOTE_NONE, quotechar='')
>>> writer.writerow(['"{}"'.format(v) if ' ' in v else v for v in valList])
1,Age," Address has spaces",employee,98363,"hobbies has space in it "

Answer 2

valList = ['1','Age',' Address has spaces','employee','98363','hobbies has space in it ']

file = open('sample.txt', 'w')
for item in valList:
    if ' ' in item:
        file.write('"%s",' % item)
    else:
        file.write("%s," % item)

输出量

1,Age," Address has spaces",employee,98363,"hobbies has space in it ",