Python : 将分隔符设置为逗号和 space ', '

Question

我想在我的 CSV 文件中附加一个新行但是新行必须用逗号分隔，并且它们之间必须用 space 分隔。我只能用逗号或 space.

分隔它们

当前文件是：

data.csv

1,abc1,xyz1
2,abc2,xyz2
3,abc3,xyz3
4,abc4,xyz4
5,abc5,xyz5

我想要它：

data.csv

1, abc1, xyz1
2, abc2, xyz2
3, abc3, xyz3
4, abc4, xyz4
5, abc5, xyz5

我写CSV的代码：

my_new_row = [6, 'abc6', 'xyz6']
with open('data.csv', 'a', newline='') as filehandle:
    writer = csv.writer(filehandle, delimiter=',')
    writer.writerow(my_new_row)

Answer 1

不是最好的解决方案，但根据您的要求，我可以想到的一种解决方案是

import csv
my_new_row = [6, 'abc6', 'xyz6']
with open('data.csv', 'a') as filehandle:
    writer = csv.writer(filehandle, delimiter=',')
    writer.writerow([' ' + str(i) if isinstance(i, str) else i for i in my_new_row])

O/P: 6, abc6, xyz6

试试这个，如果有帮助请告诉我。

Answer 2

您要打印的格式似乎不是标准的 CSV 格式。所以你可以编写自己的编写器来打印该字符串格式。

Common Format and MIME Type for Comma-Separated Values (CSV) Files

Answer 3

这当然不是很有效，但它确实解决了您的问题，只有新行在分隔符之后包含空格。

import csv

my_new_row = [6, 'abc6', 'xyz6']
x, y = ',', ', '

with open('data.csv', 'r', newline='') as original_file:
    original_reader = csv.reader(original_file)
    with open('new_file.csv', 'w', newline='') as new_file:
        new_writer = csv.writer(new_file, delimiter=',')
        for line in original_reader:
            new_writer.writerow(line)
        with open('temp_file.csv', 'w+', newline='') as temp_file:
            temp_reader = csv.reader(temp_file)
            temp_writer = csv.writer(temp_file, delimiter=',')
            temp_writer.writerow(my_new_row)
            temp_file.seek(0)
            data = temp_file.read()
            temp_file.seek(0)
            temp_file.write(data.replace(x, y))
            temp_file.seek(0)
            for line in temp_reader:
                new_writer.writerow(line)

输出全部写入new_file.csv

Answer 4

AS CVS 文件格式表示“,”comma-separated 值，我假设您现在不再需要 CSV 输出文件，而是一个简单的文本输出文件。

以下代码将产生您想要的输出

def readAndWriteFile(read_file_path,write_file_path):
    with open(read_file_path,"r") as fin:
        output = [", ".join(element.split(',')) for element in fin.readlines()]
    print("output:",output)
    
    with open(write_file_path,'w') as fout:
        fout.writelines(output)

Answer 5

这是一个简单的解决方法：

import csv

class CSV_Translater(object):
    """ Output file-like object that translates characters. """
    def __init__(self, f, old, new):
        self.f = f
        self.old = old
        self.new = new
    def write(self, s):
        self.f.write(s.replace(self.old, self.new))
    def close(self):
        self.f.close()
    def flush(self):
        self.f.flush()

my_new_row = ['6', 'abc6', 'xyz6']


with open('data.csv', "r+") as filehandle:
    reader = csv.reader(filehandle)
    with open('out_test.csv', "w") as opfile:
        translater = CSV_Translater(opfile, ',', ', ')
        writer = csv.writer(translater, delimiter=',')
        for row in reader:
            writer.writerow(row)
        writer.writerow(my_new_row)

1

Python : 将分隔符设置为逗号和 space ', '

Python : set delimiter as both comma and space ', '

python

python-3.x

csv

csv-write-stream

我写CSV的代码：