python: 前后缀操作

import os

path = 'first_directory/second_directory/file.txt'
print os.path.splitext(path)[1]
print type(os.path.splitext(path)[1])

.txt
<type 'str'>

path = 'first_directory/second_directory/file.txt'
print path.startswith('fir')

True

path = 'first_directory/second_directory/file.txt'
print path.endswith('.txt')

True

import os

path = 'first_directory/second_directory/file.txt'

print os.path.splitext(path)
print os.path.splitext(path)[1]
print type(os.path.splitext(path)[1])
print
print path.startswith('fir')
print path.startswith('aaa')
print type(path.startswith('fir'))
print
print path.endswith('.txt')
print path.endswith('.aaa')
print type(path.endswith('.txt'))

('first_directory/second_directory/file', '.txt')
.txt
<type 'str'>

True
False
<type 'bool'>

True
False
<type 'bool'>