Python基础学习代码之映像集合

def func1():
    dict1 = {}
    dict2 = {'name':'earth','port':80}
    return dict1,dict2

def func2():
    return dict((['x',1],['y',2]))

def func3():
    adict = {}.fromkeys(['x','y'],23)
    return adict

def func4():
    alist = {'name':'earth','port':80}
    for keys in alist.keys():
        print "%s %s" % (keys,alist[keys])

def func5():
    alist = {'name':'earth','port':80}
    for keys in alist:
        print "%s %s" % (keys,alist[keys])

def func6(akey):
    alist = {'name':'earth','port':80}
    if akey in alist:
        return True
    else:
        return False

def func7(akey):
    alist = {'name':'earth','port':80}
    if alist.has_key(akey):
        return True
    else:
        return False

def func8():
    alist = {'name':'earth','port':80}
    print 'host %(name)s is running on %(port)d' % alist

def func9(akey):
    alist = {'name':'earth','port':80}
    if akey in alist:
        del alist[akey]
        return True
    else:
        return False

def func10():
    alist = {'name':'earth','port':80}
    alist.clear()
    return alist

def func11():
    alist = {'name':'earth','port':80}
    del alist

def func12(akey):
    alist = {'name':'earth','port':80}
    if akey in alist:
        return alist.pop(akey)

def func13():
    alist = {'name':'earth','a':80}
    blist = {'name':'earth','z':8080}
    return cmp(alist,blist)

def func14():
    alist = zip(('x','y'),(1,2))
    blist = dict([('xy'[i-1],i) for i in range(1,3)])
    return dict(alist),blist

def func15():
    adict = {'name':'earth','port':80}
    bdict = adict.copy()
    return bdict,len(bdict)

def func16():
    adict = {'name':'earth','port':80}
    bdict = {'name':'earth','port':8080}
    print adict.keys()
    print adict.values()
    print adict.items()
    adict.update(bdict)
    print adict

def func17():
    adict = {'name':'earth','port':80}
    for keys in sorted(adict):
        print 'adict %s has value %s' % (keys,adict[keys])

def func18(akey):
    adict = {'name':'earth','port':80}
    if adict.get(akey):
        return True
    else:
        return 'no such key!'

def func19():
    adict = {'name':'earth','port':80}
    bdict = {}.fromkeys('abc')
    print bdict
    return adict.setdefault('name','wycqhost')

import time
nowtime = time.time()
def gettime(nowtime):
    return time.strftime('%Y/%m/%d %H:%M:%S',time.localtime(nowtime))

login = {}
def newuser():
    prompt = 'login desired:'
    name = ''
    while True:
        name = raw_input(prompt)
        if login.has_key(name):
            prompt = 'name taken,try another:'
            continue
        else:
            break
    pwd = raw_input('passwd:')
    login[name] = [abs(hash(pwd))]
    login[name].append(0)
    print login

def olduser():
    nowtime = time.time()
    name = raw_input('login:')
    if name not in login:
        choose = raw_input('will you create a new user(y/n)')
        if choose.lower()[0] == 'y':
            newuser()
        else:
            pass
        showmenu()
    else:
        pwd = raw_input('passwd:')
        passwd = login.get(name)[0]
        if abs(hash(passwd)) == abs(hash(pwd)):
            if login[name][1] == 0:
                print login
                print 'welcome back',name,'you first time loggin'
            else:
                print 'welcome back',name
                if nowtime - login[name][1] <= 14400:
                    print 'you are already logged at time',gettime(login[name][1])
            login[name][1] = nowtime
        else:
            print 'login incorrect'
            return

def showuser():
    print 'show all user:'
    for user in login.keys():
        print user

def deleteuser():
    duser = raw_input('delete user:').lower()
    if duser in login.keys():
        del login[duser]
    else:
        print 'user %s is not exists' % duser
        showmenu()

def showmenu():
    prompt = '''
(n)ew user login
(o)ld user login
(s)how all user
(d)elete user
(q)uit
enter choice:
'''
    done = False
    while not done:
        chosen = False
        while not chosen:
            try:
                choice = raw_input(prompt).strip()[0].lower()
            except (EOFError,KeyboardInterrupt):
                choice = 'q'
            print 'you picked %s' % choice
            if choice not in 'noqds':
                print 'invalid option,try again'
            else:
                chosen = True
            if choice == 'q':
                done = True
            if choice == 'n':
                newuser()
            if choice == 'o':
                olduser()
            if choice == 'd':
                deleteuser()
            if choice == 's':
                showuser()
#if __name__ == '__main__':
 #   showmenu()

def func20():
    str1 = '093keffeoelgn'
    t = set(str1)
    s = frozenset(str1)
    return t == s

def func21():
    aset = set('xiewenbin')
    if 'x' in aset:
        print "x in aset"

def func22():
    aset = set('strings')
    aset.add('http')
    aset.update('httpx')
    aset.remove('http')
    aset -= set('x')
    for i in aset:
        print i
    del aset

def func23():
    aset = set('abc')
    bset = set('abcedf')
    return aset <= bset

def func24():
    aset = set('markshop')
    bset = frozenset('earthshop')
    print aset | bset
    print bset & aset
    print aset ^ bset
    print aset - bset

def func25():
    s = set('cheeseshop')
    u = frozenset(s)
    s |= set('xie')
    print s
    s = set(u)
    s &= set('shop')
    print s
    s = set(u)
    s -= set('shop')
    print s
    s = set(u)
    t = frozenset('bookshop')
    s ^= t
    print s
    print len(s)
import os
def func26():
    frozenset(['a','b','c'])
    f = open('test.txt','w')
    for i in range(5):
        f.write('%d\n'%i)
    f.close()
    f = open('test.txt','r')
    print set(f)
    f.close()
    os.remove('test.txt')

def func27():
    alist = ['a','b']
    blist = [1,2]
    print dict(zip(alist,blist))

def func28():
    adict = {'a':1,'b':2,'c':3}
    bdict = {}
    for keys in adict.keys():
        bdict[adict[keys]] = keys
    return bdict

def func29(sstr,dstr,string,casemap=True):
    assert len(sstr) >= len(dstr)
    table = dict(zip(sstr,dstr))
    print table
    if len(sstr) > len(dstr):
        temp = {}.fromkeys(sstr[len(dstr)])
        table.update(temp)
        print table
    ls = []
    for ch in string:
        if not casemap:
            if ch.lower() in table:
                ls.append(table[ch.lower()])
            elif ch.upper() in table:
                ls.append(table[ch.upper()])
            else:
                ls.append(ch)
                continue
        if ch in table:
            ls.append(table[ch])
        else:
            ls.append(ch)
    ls = [ch for ch in ls if ch]
    print ls
    return " ".join(ls)

def func30(sstr):
    alist = [chr((num + 13) % 26 + ord('a')) for num in range(26)]
    blist = [chr(num + ord('a')) for num in range(26)]
    table = dict(zip(blist,alist))
    astr = "".join(alist).upper()
    bstr = "".join(blist).upper()
    table.update(dict(zip(bstr,astr)))
    ls = []
    for ch in sstr:
        if ch in table:
            ls.append(table[ch])
        else:
            ls.append(ch)
    return " ".join(ls)

import random
def func31():
    alist = [random.randint(i,10) for i in range(10)]
    blist = [random.randint(i,10) for i in range(10)]
    aset = set(alist)
    bset = set(blist)
    print aset | bset
    print aset & bset