python:practice random module verification code program
摘要：random :third party libraries common usage: random.randint(10) random.randrange(10) random.choice(1,2) random.choices random.shuffle([1,2,3]) so on cr
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摘要：content: 1:generator of list【】： list=[x for x in range(10)] realize:[0,1,2,3,4,5,6,7,8,9] list=[x 2 for x in range(10)] list=[x x for x in range(10)]
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摘要：python decorator is a crucial(vital,signifiant) process. decorator mail two category 1:principal function no arguments(parameters): for example: princ
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摘要：from functools import reduce import time def factorial_array(n) number=reduce(lambda x,y:x*y,range(1,n+1)) return number print( factorial_array(101) d
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摘要：instances: def func(): x=10 def inner(): print(x) return inner a=func() a() result of execute is 10 print(a()) result of execute is none :because the
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摘要：function domain: L ocal E nclosing Global Built-in instance: def outer(): x=10 def inner(): print(x) return inner call inner method 1:print (outer()()
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摘要：built-in function,is python already prepar for us ,anytime we can call built-in function when we needed it . all() dict() help() all([1,2,'') eval('1+
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摘要：fibo digit array: 1 2 3 4 5 6 7 8 9 10 11 0 1 1 2 3 5 8 13 21 34 55 we can find out the rule(law ,regularity,disciplinarian). the number equity before
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摘要：starting with a factorial : def function_factorial(n): number=1 for i in range(1,n+1): number *=i return number print(function_factorial( n) use this
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摘要：def print_all(x,y,z): print(z(x)+z(y)) print_all(3,3,get) 60 higher-order function: define: at least satisify one in two condition .accept one or more
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摘要：content will be learn: how to use set. set is a object ,characters :not be repetitive,can be hashing. startup in two way : set () can be add and delet
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摘要：def add(*args): sum=0 for i in args: sum+=i add(1,2,3,4) print(add) # nano def add(*args): sum=0 for i in args: sum+=i return sum,123,[1,2,3] add(1,2,
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摘要：define function .return value is required. instance: def f(): print('hello world') return 10 # return represents two replications. 1:process is execut
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摘要：import sys,time for i in range(10): sys.stdout.write('***") can output *************** standard input: stdin standard output: stdout test； import sys,
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摘要：list ,dict,tuple, or docentment all can use for in loop> number=0 for i in file: number+=1 if i ==3: i=" ".join((i.strip,'word') print(i) read article
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摘要：handle class: for instance read file(article,assay,thesis,paper,ect...)ddd file_read=open('d:\jetbrians.com\python\pycharm\guide','r',encoding='UTF-8'
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摘要：chinese Ascii unicode--utf-8 The history of compute programe develpement,as long as compute programing language. The C++，Java,Javascript,python,eclips
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摘要：menu={'jx':{'shangrao':{'yiyang':{'zuoshenwei':{'staff':69,'money':9002869}, 'haungjia':{'landscape':'beatiful','dog':4} }, 'hengfeng':{}, 'yangshang'
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摘要：menu={'china':{'jx_province':{'sr_manicipality':{'yiyang_country':['qinghu_town','guifeng_town','wangli_town']},},}, 'American':{'wathton.dc':{'ei':{'
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摘要：str='hello world' str.startswith('he') str.endswith{'y"} str.expendtabs() st='he \t llo world' st.expandtabs(tabsize=10) st.find('e') :find first elem
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摘要：dic={'name':'alan','age':12,'city':'canton'｝ for i in dic: print(i,dic[i]) for i in dic.items(): print(i) for items in dict.items(): print(items) for
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摘要：new dict dict={} dict1=dict((())) dict2=dict.fromkeys([1,2,3,4],[2,3,9]) dict={'key':value','key':'value','key':'value'} dict['key']='value' dict.popi
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摘要：commodity_list=[('bicycle',9000),('iphone',20000),('tesla',20000),('python book',109),('mac book',2000)] deposit=input('please input your budget:') if
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