Question

嗨，我有一些问题。

mpv_set_option_string(mpv, "input-default-bindings", "no");

'names.csv'结果

acol bcol ccol

a a a

acol bcol ccol

b b b

acol bcol ccol

c c c

acol bcol ccol

d d d

acol bcol ccol

e e e''

有whiteline和colume重复我想要没有白行且没有colume repeat的结果

Answer 1

你可以试试这个

import csv
test = ['a','b','c','d','e']

with open('names.csv', 'wb') as csvfile:
    fieldnames = ['acol', 'bcol', 'ccol']
    writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
    writer.writeheader()
    for t in test:
        writer.writerow({'acol': t, 'bcol': t, 'ccol': t})

Answer 2

import csv
test = ['a','b','c','d','e']

for i,t in enumerate(test):
    with open('names.csv', 'a') as csvfile:

        fieldnames = ['acol', 'bcol', 'ccol']
        writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
        if i == 0:
            writer.writeheader()
        writer.writerow({'acol': t, 'bcol': t, 'ccol': t})

Divakar提供的另一个解决方案更加优雅和快捷，因为您不会在每个循环中打开文件。

Answer 3

使用此

import csv
test = ['a','b','c','d','e']

for t in test:
    with open('names.csv', 'w') as csvfile:

        fieldnames = ['acol', 'bcol', 'ccol']
        writer = csv.writer(csvfile)
        writer.writerow(fieldnames)

        for elem in test:
            writer.writerow(elem * 3)

这是names.csv的输出，它没有任何换行符

acol,bcol,ccol
a,a,a
b,b,b
c,c,c
d,d,d
e,e,e

Answer 4

import csv
test = ['a','b','c','d','e']

with open('names.csv', 'a') as csvfile:
    fieldnames = ['acol', 'bcol', 'ccol']
    writer = csv.DictWriter(csvfile,delimiter=' ',fieldnames=fieldnames,lineterminator=' ')
    writer.writeheader()
    for t in test:
        writer.writerow({'acol': t, 'bcol': t, 'ccol': t})

您正在循环中编写标题，因此它们会被重写多次，默认情况下行终止符是＆＃39; \ n＆＃39;它给出了行尾的新空格。这给出了上面引用的结果

Python附加到没有白行且没有重复列的csv文件

4 个答案: