Save list of ordered tuples as CSV [duplicate]

问题

This question already has answers here:

Python, transposing a list and writing to a CSV file (3 answers)

Closed 6 years ago.

I have a list of tuples ordered by value. They are in the form (name,count) where count is number of occurrences for each unique name.

I would like to take this list and transform it into CSV where each name is column header and each value is column value of a single row.

Any suggestions how to do it? Thanks.

回答1:

You can do this:

import csv

data=[('smith, bob',2),('carol',3),('ted',4),('alice',5)]

with open('ur file.csv','wb') as out:
    csv_out=csv.writer(out)
    csv_out.writerow(['name','num'])
    for row in data:
        csv_out.writerow(row)

    # You can also do csv_out.writerows(data) instead of the for loop

the output file will have:

name,num
"smith, bob",2
carol,3
ted,4
alice,5

回答2:

simple google search (Didn't use the Google nose):

Python, transposing a list and writing to a CSV file :

import csv   
lol = [(1,2,3),(4,5,6),(7,8,9)]
item_length = len(lol[0])

with open('test.csv', 'wb') as test_file:
  file_writer = csv.writer(test_file)
  for i in range(item_length):
    file_writer.writerow([x[i] for x in lol])

output

1,4,7
2,5,8
3,6,9

来源：https://stackoverflow.com/questions/15578331/save-list-of-ordered-tuples-as-csv