Python：将元组列表写入文件
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Python: Write a list of tuples to a file
提问by Adia
How can I write the following list:
我该如何编写以下列表：
[(8, 'rfa'), (8, 'acc-raid'), (7, 'rapidbase'), (7, 'rcts'), (7, 'tve-announce'), (5, 'mysql-im'), (5, 'telnetcpcd'), (5, 'etftp'), (5, 'http-alt')]
to a text file with two columns (8 rfa)and many rows, so that I have something like this:
到一个有两列(8 rfa)多行的文本文件，所以我有这样的东西：
8 rfa
8 acc-raid
7 rapidbase
7 rcts
7 tve-announce
5 mysql-im
5 telnetcpcd
采纳答案by Ignacio Vazquez-Abrams
with open('daemons.txt', 'w') as fp:
fp.write('\n'.join('%s %s' % x for x in mylist))
If you want to use str.format(), replace 2nd line with:
如果要使用 str.format()，请将第 2 行替换为：
fp.write('\n'.join('{} {}'.format(x[0],x[1]) for x in mylist)
回答by Katriel
回答by Adia
Here is the third way that I came up with:
这是我想出的第三种方法：
for number, letter in myList:
of.write("\n".join(["%s %s" % (number, letter)]) + "\n")
回答by stan
open('filename', 'w').write('\n'.join('%s %s' % x for x in mylist))
回答by Rohit Sohlot
simply convert the tuple to string with str()
只需将元组转换为字符串 str()
f=open("filename.txt","w+")
# in between code
f.write(str(tuple)+'/n')
# continue
回答by leon koech
For flexibility, for example; if some items in your list contain 3 items, others contain 4 items and others contain 2 items you can do this.
例如，为了灵活性；如果您列表中的某些项目包含 3 个项目，其他项目包含 4 个项目，而其他项目包含 2 个项目，您可以执行此操作。
mylst = [(8, 'rfa'), (8, 'acc-raid','thrd-item'), (7, 'rapidbase','thrd-item','fourth-item'),(9, 'tryrt')]
# this function converts the integers to strings with a space at the end
def arrtostr(item):
strr=''
for b in item:
strr+=str(b)+' '
return strr
# now write to your file
with open('list.txt','w+') as doc:
for line in mylst:
doc.write(arrtostr(line)+'\n')
doc.close()
And the output in list.txt
和 list.txt 中的输出
8 rfa
8 acc-raid thrd-item
7 rapidbase thrd-item fourth-item
9 tryrt
