file_obj2=open('hello.txt','w')conta='my name is Bb'file_obj2.write(conta)v=file_obj2.readlines()PRint v

def checkio(data):    from collections import Counter    nonunique = Counter(data) - Counter(set(data))    return [x for x in data if x in nonunique]print checkio([1,31,5,13,13,1,1])print counter(set([1,31,5,13,13,1,1]))

#Your optional code here#You can import some modules or create additional functionsdef checkio(data):    return [x for x in data if data.count(x) > 1] #Some hints#You can use list.count(element) method for counting.#Create new list with non-unique elements#or remove elements from original list (but it's bad practice for many real cases)#Loop over original list#These "asserts" using only for self-checking and not necessary for auto-testingif __name__ == "__main__":    assert isinstance(checkio([1]), list), "The result must be a list"    assert checkio([1, 2, 3, 1, 3]) == [1, 3, 1, 3], "1st example"    assert checkio([1, 2, 3, 4, 5]) == [], "2nd example"    assert checkio([5, 5, 5, 5, 5]) == [5, 5, 5, 5, 5], "3rd example"    assert checkio([10, 9, 10, 10, 9, 8]) == [10, 9, 10, 10, 9], "4th example"

i=1;s=0;while i<=100:    print s,i    s=s+i    i=i+1print 'exit'

def test_e(val1,val2,val3):    print val1    print val2    print val3    return val1+val2+val3test_e(5,23,55)

list1=[2,65,'g',5656] #list 數(shù)據(jù)類(lèi)型i=0;for lists in list1:    print format(i,'2d'),lists    i=i+1

j=0;string ='hello world'list2=list(string)  #for str in list2:  #string 直接用數(shù)據(jù)也可以    print format(j,'2d'),str;    j=j+1;k=0;for k in range(1,101,2):  #range 函數(shù) 范圍在 start 到 end-1 最后一位為每個(gè)數(shù)字間隔數(shù)    print k;

#轉(zhuǎn)移字符串print r'hello/nworld'  #r關(guān)閉轉(zhuǎn)義字符串的作用print u'unicode'  #unicode 字符串#格式化字符串print 'your age is %d'%(28) 

# open('c://temp//temp.txt','a+') 用一個(gè)‘、’可能被認(rèn)為是轉(zhuǎn)義字符

s1='www.hxend's2='.com'print s1,s2    #這樣輸出的話(huà)  中間會(huì)存在一個(gè)空格print s1+s2   #用‘+’連接兩個(gè)字符串#字符串的重復(fù)  *s='abcdefg'print s*5

#訪(fǎng)問(wèn)字符串的某個(gè)元素  index索引ch = s[3]print ch#python 切片  slice s[i:j]sub =s[3:5]  #從 start 到 end-1print subprint s[:5]print s[3:]print s[-4:-1]  #如果發(fā)生錯(cuò)誤 就會(huì)出現(xiàn) 空格表示#   s[i:j:k]print s[-1:-4:-1]  #倒序輸出  依次減一s2='www.hxend.com'print s2[9:4:-1]print s2[-1:0:-1]print s2[-1::-1]#用for 循環(huán)遍歷整個(gè)字符串s5='www.hxend.com'for ch in s5:    print ch;

list2=[2,32,32,23,232,3,2]list2.append(1)  #append()  增加在尾部print list2

adict={'mother':45,'father':55}print adictadict['grandfather']=87 #增加在首部print adictprint adict.keys()  #  名字print adict['father']  #提取內(nèi)容#print 默認(rèn)為每個(gè)輸出 輸出一個(gè)換行  后面加上一個(gè)  , 可以改變這個(gè)狀態(tài)a='sdgsdgsdsdh'for i ,ch in  enumerate(a):   #enumrate() 函數(shù)    print ch,i

sqdEvens = [x ** 2 for x in range(8) if not x % 2]print sqdEvens`'''handle = open(file_name, access_mode = 'r')file_name 變量包含我們希望打開(kāi)的文件的字符串名字， access_mode 中 'r' 表示讀取，'w' 表示寫(xiě)入， 'a' 表示添加。'''file1=open('second.py','r')   #文件操作print file1.readline()#print file1.read()a=file1.readlines() #readlines() 自動(dòng)將文件內(nèi)容分析成一個(gè)行的列表，#該列表可以由 Python 的 for ... in ... 結(jié)構(gòu)進(jìn)行處理print a[1]