今天来看一下如何使用python处理excel文件,处理excel文件是在工作中经常用到的,python为我们考虑到了这一点,python中本身就自带csv模块。
1.用python读取csv文件:
csv是逗号分隔符格式 一般我们用的execl生成的格式是xls和xlsx 直接重命名为csv的话会报错:
Error: line contains NULL byte
insun解决方案:出错原因是直接是把后缀为xls的execl文件重命名为csv的 正常的要是另存为csv文件 就不会报错了
譬如我们有这么个csv文件:
#!/usr/bin/env python # -*- coding:utf-8 -*- import csv with open ( ‘egg.csv‘ , ‘rb‘ ) as f: reader = csv.reader(f) for row in reader: print row |
打印出来是这样的list
[‘a‘, ‘1‘, ‘1‘, ‘1‘]
[‘a‘, ‘2‘, ‘2‘, ‘2‘]
[‘b‘, ‘3‘, ‘3‘, ‘3‘]
[‘b‘, ‘4‘, ‘4‘, ‘4‘]
[‘b‘, ‘5‘, ‘5‘, ‘5‘]
[‘b‘, ‘6‘, ‘6‘, ‘6‘]
[‘c‘, ‘7‘, ‘7‘, ‘7‘]
[‘c‘, ‘8‘, ‘8‘, ‘8‘]
[‘c‘, ‘9‘, ‘9‘, ‘9‘]
[‘c‘, ‘10‘, ‘10‘, ‘10‘]
[‘d‘, ‘11‘, ‘11‘, ‘11‘]
[‘e‘, ‘12‘, ‘12‘, ‘12‘]
[‘e‘, ‘13‘, ‘13‘, ‘13‘]
[‘e‘, ‘14‘, ‘14‘, ‘14‘]
2.用python写入并生成csv
#!/usr/bin/env python # -*- coding:utf-8 -*- import csv with open ( ‘egg2.csv‘ , ‘wb‘ ) as csvfile: spamwriter = csv.writer(csvfile, delimiter = ‘ ‘ ,quotechar = ‘|‘ , quoting = csv.QUOTE_MINIMAL) spamwriter.writerow([ ‘a‘ , ‘1‘ , ‘1‘ , ‘2‘ , ‘2‘ ]) spamwriter.writerow([ ‘b‘ , ‘3‘ , ‘3‘ , ‘6‘ , ‘4‘ ]) spamwriter.writerow([ ‘c‘ , ‘7‘ , ‘7‘ , ‘10‘ , ‘4‘ ]) spamwriter.writerow([ ‘d‘ , ‘11‘ , ‘11‘ , ‘11‘ , ‘1‘ ]) spamwriter.writerow([ ‘e‘ , ‘12‘ , ‘12‘ , ‘14‘ , ‘3‘ ]) |
这样存进去的是存到一列了 跟我们原本意图存进5列不一样
使用python的csv生成excel所兼容的csv文件的话,主要就是创建writer时的参数时要有dialect=’excel’
代码修改为:
#!/usr/bin/env python
# -*- coding:utf-8 -*-
import
csv
with
open
(
‘egg2.csv‘
,
‘wb‘
) as csvfile:
spamwriter
=
csv.writer(csvfile,dialect
=
‘excel‘
)
spamwriter.writerow([
‘a‘
,
‘1‘
,
‘1‘
,
‘2‘
,
‘2‘
])
spamwriter.writerow([
‘b‘
,
‘3‘
,
‘3‘
,
‘6‘
,
‘4‘
])
spamwriter.writerow([
‘c‘
,
‘7‘
,
‘7‘
,
‘10‘
,
‘4‘
])
spamwriter.writerow([
‘d‘
,
‘11‘
,
‘11‘
,
‘11‘
,
‘1‘
])
spamwriter.writerow([
‘e‘
,
‘12‘
,
‘12‘
,
‘14‘
,
‘3‘
])
原文:http://www.cnblogs.com/zln1021/p/6062773.html