如何更改python（2.7）中的csv文件的标题？

Question

我是初学者，在csv文件中有以下数据，我想将'account_key'更改为'acct'。我应该怎么做呢？

account_key，地位，join_date，CANCEL_DATE，days_to_cancel，is_canceled
448，取消2014-11-10,2015-01-14,65，真
448，取消，2014-11-05,2014- 11-10,5，真
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Answer 1

如果文件足够小，以适应到主存储器：

import csv 

with open('path/to/file') as infile: 
    data = list(csv.reader(infile)) 
data[0][0] = 'acct' 

with open('path/to/file', 'w') as fout: 
    outfile = csv.writer(fout) 
    outfile.writerows(data) 

如果文件过大t o适合主内存：

with open('path/to/file') as fin, open('path/to/output', 'w') as fout: 
    infile = csv.reader(fin) 
    header = next(infile) 
    header[0] = 'acct' 
    outfile.writerow(header) 
    for row in infile: 
     outfile.writerow(row)