Python的杂七杂八
1. 读取文件列表import os
print os.listdir('.')
files =
2. 读取文件自动关闭
with open(filename) as file:
for line in file:
print line
3.两个字典相加
有如下两个字典
a = dict()
a['cat'] = 1
a['fish'] = 10
a['aardvark'] = 1000
b = dict()
b['cat'] = 2
b['dog'] = 200
b['aardvark'] = 2000
目标相加之后获得如下字典：
{'cat': 3, 'fish': 10, 'dog': 200, 'aardvark': 3000}
可以通过如下方法获得：
dict( (n, a.get(n, 0)+b.get(n, 0)) for n in set(a)|set(b) )
4.将文本文件转换为二进制文件
import binascii
with open ( "regular_english_file.txt", "r" ) as myfile:
print bin( int( binascii.hexlify( myfile.read() ), 16 ) );
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