1.os
(1) Defination:
os.path.exists(a) #judge if the path exists or not
(2) Demo:
a = '\D\Python\project111'
print os.path.exists (a)
(3) Results:
Fasle
(4) Reference:
https://www.cnblogs.com/pingqiang/p/7817983.html
2. def
(1) Defination:
def function_name (paremeters):
expressions #if want to reture paremeters . please using return function
(2) Demo:
def function ():
print('This is a function')
a= 1+2
print(a)
(3) Results:
This is a function
(4) Reference:
https://www.cnblogs.com/derezzed/articles/8119592.html
3. argparse
(1) Definition:
impore argparse
parser = argparse.ArgumentParser() #build a new object
parser.add_argument() #introduce command line paremeters and options
parser.parse_args() #make analysis
details:
name or flags: choose name of string , e.g. foo or -f, --foo
action: command line action when across into one paremeters,
nargs: numbers of command line paremeters
const: needing by action and nargs
help: reference information
(2) Demo:
(3) Result:
(4) Reference:
https://blog.csdn.net/lly_zy/article/details/97130496
4. super
(1) Defination:
def__init__(self,dim_in,dim_out):
super(test, self)._init_()
