尝试从输入写入 csv，csv 输出文件显示每个名称在字母和 1 行中的空行之间带有冒号

Question

import csv 
n = int(input("How many records ?"))
b = 0
for i in range(n):


   s = input("what is the name of the student  ")
   g = input(" grade ?")
   k.append(s),k.append(g)
 print("res",'[%s]'%', '.join(map(str, k)))

StuGrade = "StuGrade.csv"
with open(StuGrade, 'w' ) as f :
    thewriter = csv.writer(f)
    thewriter.writerow( k[0])
    for i in range(n*2-1) :
        b=b+1
        thewriter.writerow( k[b])

这是我程序的输出：

How many records 1

what is the name of the student  ahmad 
 grade ? 3
res [ahmad ,  3]

csv 文件如下所示：

a,h,m,a,d,

,3

我想要这样：

ahmad
3

Answer 1

csv.writerow() 获取该行的值列表 - 您提供的是单个值。字符串是可迭代的——如果你给 csv.writerow() 一个字符串，它将使用每个字母作为 1 列。您可以解决将其作为 1 个元素列表提供的问题：

 thewriter.writerow( [ k[b] ] )  # 1 element list

要正确写入 csv（每行有单个值或多个值和多行），您在打开文件时缺少 newline=""（这有据可查）以正确创建 csv 文件 - 丢失这会在您当前的输出中引入空行。

with open(StuGrade, 'w', newline = "") as f :  # add  newline = ""

您真的不需要 csv 编写器来创建每行 1 个内容的文件：

with open("file.txt","w") as f:
    for word in k:               # dont use index iterating, use element itering
        f.write(word + "\n")

会做的。

Fix/Demo 每行 2 个值：

import csv 

k = ["ABC","5", "BCD","7", "CDE","42"]

StuGrade = "StuGrade.csv"
with open(StuGrade, 'w', newline = "") as f :  # added newline
    thewriter = csv.writer(f)

    # go over the range of input indexes and increase by 2       
    for idx in range(0, len(k), 2):
        # slice and write 2 values as 2 columns from your k list at once 
        thewriter.writerow( k[idx : idx+2]) 

print(open("StuGrade.csv").read())

输出：

ABC,5
BCD,7
CDE,42

尝试从输入写入 csv，csv 输出文件显示每个名称在字母和 1 行中的空行之间带有冒号

Trying to write to csv from input , csv output file shows each name with colons between letters and emtpy line in 1 row

python

csv