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 阅读全文

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, 阅读全文

摘要： define function .return value is required. instance: def f(): print('hello world') return 10 # return represents two replications. 1:process is execut 阅读全文

摘要： import sys,time for i in range(10): sys.stdout.write('***") can output *************** standard input: stdin standard output: stdout test； import sys, 阅读全文

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 阅读全文

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' 阅读全文

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 阅读全文

摘要： menu={'jx':{'shangrao':{'yiyang':{'zuoshenwei':{'staff':69,'money':9002869}, 'haungjia':{'landscape':'beatiful','dog':4} }, 'hengfeng':{}, 'yangshang' 阅读全文

摘要： menu={'china':{'jx_province':{'sr_manicipality':{'yiyang_country':['qinghu_town','guifeng_town','wangli_town']},},}, 'American':{'wathton.dc':{'ei':{' 阅读全文

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 阅读全文