[英]Trying to write to csv from input , csv output file shows each name with colons between letters and emtpy line in 1 row
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])
This is the output of my program:这是我程序的 output:
How many records 1 what is the name of the student ahmad grade? 3 res [ahmad, 3]
The csv file looks like this: csv 文件如下所示:
a,h,m,a,d,
艾哈迈德,
,3
,3
I want it like that:我想要这样:
ahmad
艾哈迈德
33个
csv.writerow()
takes a list of values for that row - you are supplying single values. csv.writerow()
获取该行的值列表 - 您提供的是单个值。 Strings are iterables - if you give one string to csv.writerow()
it will use every single letter as 1 column.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。 You could fix that supplying it as 1 element list:您可以修复将其作为 1 个元素列表提供的问题:
thewriter.writerow( [ k[b] ] ) # 1 element list
To write a csv correctly (with single or with multiple values per row and multiple rows) you are missing a newline=""
when opening the file (this is well documented) to create the csv file correctly - missing this introduces the empty line in your current output.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 - 缺少它会引入空行您当前的 output。
with open(StuGrade, 'w', newline = "") as f : # add newline = ""
You do not really need a csv writer to create a file with 1 thing per line:您实际上不需要 csv 编写器来创建每行包含 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")
would do it.会做的。
Fix/Demo for 2 values per line:每行 2 个值的修复/演示:
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())
Output: Output:
ABC,5
BCD,7
CDE,42
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