Python---os

'''help----os, help----glob'''
import os
import time
import glob

print(os.getcwd())
os.chdir('/home/tizen/share')
print(os.getcwd())
path='/home/tizen/share/tools/python'
path2='/home/tizen/share/tools/python/'
'''don't care about / when join'''
print(os.path.join(path2,'os_m.py'))
print(os.path.join(path,'os_m.py'))
print(os.path.expanduser('~'))
'''get dir for ~, return path without \ in the end, but join don't care about it'''
print(os.path.join(os.path.expanduser('~'), 'share/tools/python','os_m.py'))

path3='/home/tizen/share/tools/python/os_m.py'
(dirname,filename)=os.path.split(path3)
print(dirname)
print(filename)
(name,ext)=os.path.splitext(filename)
print(name)
print(ext)

os.chdir('/home/tizen/share/tools/python/')
print(os.getcwd())
metadata=os.stat('os_m.py')
print(metadata.st_mtime)
print(time.localtime(metadata.st_mtime))
print(metadata.st_size)
print(os.path.realpath('os_m.py'))

'''analyze list'''
a_list1=[2,6,8]
a_list1=[ee*2 for ee in a_list1]
print(a_list1)
path5='/home/tizen/share/tools/python/*.py'
print(glob.glob(path5))
print(glob.glob('*.py'))
a_list3 = [os.path.realpath(ee) for ee in glob.glob('*.py')]
print(a_list3)
a_list4 = [f for f in glob.glob('*.py') if os.stat(f).st_size>1000]
print(a_list4)
a_list5=[[os.stat(f).st_size, os.path.realpath(f)] for f in glob.glob('*.py')]
print(a_list5)

'''analyze dict'''
dict_13= {f:os.stat(f).st_size for f in glob.glob('*.py')}
print(dict_13)
dict_14={'a':1,'b':2,'c':3}
dict_15={value:key for key,value in dict_14.items()}
print(dict_15)

'''analyze set'''
set_13={1,2,4,6}
set_14={f**2 for f in set_13}
print(set_14)

'''analyze tuple'''
'''none'''