python_module.txt

module
__init__.py

if __name__=='__main__':
__file__
__doc__


parameter
def fun(*args,**kargs,args='jk'):

  print arg     # default jk
  print args    # a list of arg
  pring kargs   # a dict
  
yield
with

seek=0
while True:
  with open('tmp.txt','r') as f:
    f.seek(seek)
	data=f.readline()
	if data:
	  seek=f.tell()
	  yield data
	else:
	  return
	  
result='gt' if 1>3 else 'lt'   # if true front else behind
temp=lambda x,y,z:x+y+z  

help()
dir()
vars()
type()
import tjson
reload(tjson)
id()

abs()
bool()
divmod()
max()
min()
pow()

len()
all()
any()

chr()
ord()

hex()
bin()
oct()

range()
enumerate()
s='i am {0},{1}'
s.format('fda','fb')

map()
filter()
reduce()
apply()
zip()

import json
json.dumps()
json.dump()  # write to a file
json.loads()
json.load()  # read from a file

eval('1+2')
model=__import__('os') # 以字符串形式导入模块，如果导入为目录则导入__init__.py
function=getattr(model,'uname') # 目录，则需要先导入一次模块，再导入一次函数
function()   # 以字符串形式导入函数

hasaddr()
getaddr()
setaddr()
deladdr()

import random
random.random() # 0 or 1
random.randint(1,3) # int >=1 and <=3
random.randrange(1,3) # int >=1 and <3

json random time sys os re