文章内容
2017/8/20 14:14:56,作 者: 黄兵
解决Writing a Python list of lists to a csv file
和c语言一样，不能使用'rw'方式打开一个文件并进行读写，正确的方式是‘r+’，详见http://mail.python.org/pipermail/python-bugs-list/2001-May/005216.html Bu
I have a long list of lists of the following form ---
a = [[1.2,'abc',3],[1.2,'werew',4],........,[1.4,'qew',2]]
i.e. the values in the list are of different types -- float,int, strings.How do I write it into a csv file so that my output csv file looks like
1.2,abc,3
1.2,werew,4
.
.
.
1.4,qew,2
Python 有很好的文本分析和处理能力，所以我想到，Python的文件类型file是内建类型 然后就是实例和创建函数楼（构造函数） open函数的两个参数 文件位置 打开方
answer 1 >>解决方法
Python's built-in CSV module can handle this easily:
import csv
with open("output.csv", "wb") as f:
writer = csv.writer(f)
writer.writerows(a)
This assumes your list is defined as a, as it is in your question. You can tweak the exact format of the output CSV via the various optional parameters to csv.writer() as documented in the library reference page linked above.
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