在python中使用writerow附加到我的csv

Maths12 • 5 年前 • 2028 次点击

我有一张excel表格,只有一列,标题是Name,下面的行是Jerry。我要做的就是用python加上标题:a g e,然后在下面加一行,比如14。

我该怎么做?

with open('simpleexcel.csv', 'r') as f_input:  # Declared variable f_input to open and read the input file
    input_reader = csv.reader(f_input)  # this will iterate ober lines from input file

    with open('Outputfile.csv', "w", newline='') as f_output:  # opens a file for qwriting in this case outputfile
        line_writer = csv.writer(f_output) #If csvfile is a file object, it should be opened with newline=''
        for line in input_reader: #prints every row
            line_writer.writerow(line+['14'])

相反,我得到14分和14分,我不知道怎么得到另一个头球

我首先要做的是

Name 
Jerry

Name   Age 
Jerry  14

相反,我得到:

Name   14
Jerry  14

我怎样才能修改上面的代码?

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2028 次点击

文章 [ 2 ] | 最新文章 5 年前

• 1 楼

rahul 5 年前

我不知道你想在这里完成什么,但对于你的例子来说,这是可以使用的。

import csv

with open('simpleexcel.csv', 'r') as f_input:
    input_reader = list(csv.reader(f_input))

input_reader[0].append('Age')
for row in input_reader[1:]:
    row.append(14)


with open('Outputfile.csv', "w", newline='') as f_output:
    csv.writer(f_output).writerows(input_reader)

Name
Jerry

输出:

Name,Age
Jerry,14

• 2 楼

Rakesh 5 年前

使用 next(input_reader) 获取标题,然后附加新列名并将其写回csv。

with open('simpleexcel.csv', 'r') as f_input:  # Declared variable f_input to open and read the input file
    input_reader = csv.reader(f_input)  # this will iterate ober lines from input file

    with open('Outputfile.csv', "w", newline='') as f_output:  # opens a file for qwriting in this case outputfile
        line_writer = csv.writer(f_output) #If csvfile is a file object, it should be opened with newline=''
        line_writer.writerow(next(input_reader) + ["Age"]))  #Write Header
        for line in input_reader: #prints every row
            line_writer.writerow(line+['14'])

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