python - Writing multiple items to a row in csv using for loop

Question

Suppose now I have a date and a list of groups(group A, group B, etc.) and would like to write all of them in one row in a CSV file. I have tried the following code but there are several problems.

import csv
with open('test.csv', 'w') as file:
output = csv.writer(file)
output.writerow('Date')  
for i in range(0,len(c)): 
 output.writerow([lst[i]]) #lst is the list containing the group number

The output here is

D a t e

Group A

Group B

Group C

The first issue is that each character in Date is treated separately, each of them appears in separate columns.

The second issue is that there is a new line between each row which is not desired.

Lastly, instead of writing them in rows, I want them to be in one row with multple columns. The ideal output should be as follows

Date Group A Group B Group C

标签： pythoncsv

Answer 1

You need to combine all the elements you want included in the row into a single list:

import csv
with open('test.csv', 'w') as file:
  output = csv.writer(file)
  out = ['Date']
  for i in range(0,len(c)): 
   out.append(lst[i])
  output.writerow(out)