name = "wupeiqi"
name1=name[::-1]
print(name1)
How "1,2,3" becomes [ '1', '2', '3']
name = '1,2,3'
name1=name.split(',')
print(name1)
name = '1,2,3'
l1=[]
name1=name.replace(',','')
for i in name1:
l1.append(i)
print(l1)
How [ '1', '2', '3'] becomes [1,2,3]
l1=['1','2','3']
l2=[]
for i in l1:
l2.append(int(i))
print(l2)
The following code is what the output list = () [ 'a', 'b', 'c', 'd', 'e']) print list? [10:]
[]
A list of existing alist, please write method repeats of two elements alist removed, wherein :( difficult ) required to maintain the original order in which elements of the list.
alist=[1,1,1,2,3,4,5,65,4,5,4,6,9,]
alist1=[]
for i in alist:
if i not in alist1:
alist1.append(i)
print(alist1)
Without regard to the order of the original elements of the list ( Chaogang ).
Achieve 99 multiplication table (in Python hard )
Please list each element by "_" link up.
users = [ 'Lishao Qi' 'Li sail', 'slag slag Hui']
users = [ 'Lishao Qi' 'Li sail', 'slag slag Hui']
users1 = '_'. the Join (Users)
Print (users1)
Please list each element by "_" link up.
users = [ 'Lishao Qi' 'Li sail', 666 'slag slag Hui']
users = [ 'Lishao Qi' 'Li sail', 666 'slag slag Hui']
users1 = []
for I in Users:
users1.append (STR (I))
users1 = '_'. the Join (users1)
Print (users1)
Please tuples v1 = all elements (11,22,33) is added to the list of v2 = [44,55,66] in.
v1 = (11, 22, 33)
v2 = [44,55,66]
v2.extend(v2)
print(v2)
v1 = (11, 22, 33)
v2 = [44,55,66]
for i in v1:
v2.append(i)
print(v2)
V1 = set of all tuples in (11,22,33,44,55,66,77,88,99) even index position of the element added to the list of v2 = [44,55,66] in.
v1 = (11,22,33,44,55,66,77,88,99)
v2 = [44,55,66]
for i in range(len(v1)):
if i%2==0:
v2.append(v1[i])
print(v2)
The dictionary keys and values added to the key_list and value_list two lists, such as:
key_list = []
value_list = []
info = {'k1':'v1','k2':'v2','k3':'v3'}
for i in info.keys():
key_list.append(i)
for j in info.values():
value_list.append(j)
print(key_list)
print(value_list)
字典dic = {'k1': "v1", "k2": "v2", "k3": [11,22,33]}
a. Please recycle all of the key output
dic = {'k1': "v1", "k2": "v2", "k3": [11,22,33]}
for i in dic.keys():
print(i)
b. Please recycle all of the output value
dic = {'k1': "v1", "k2": "v2", "k3": [11,22,33]}
for i in dic.values():
print(i)
c. Please recycle all of the key and the output value
dic = {'k1': "v1", "k2": "v2", "k3": [11,22,33]}
for kay,val in dic.items():
print (kay, val)
. D add a key-value pair in the dictionary, "k4": "v4", added after the output dictionary
dic = {'k1': "v1", "k2": "v2", "k3": [11,22,33]}
dic['k4']='v4'
print(dic)
dic = {'k1': "v1", "k2": "v2", "k3": [11,22,33]}
dic.setdefault('k4','v4')
print(dic)
e. Please after the dictionary, and outputs modified "k1" corresponds to a value "alex" in the dictionary modification
dic = {'k1': "v1", "k2": "v2", "k3": [11,22,33]}
dic.setdefault('k4','v4')
print(dic)
Append a dictionary element 44, the output value corresponding modifications k3 after the
dic = {'k1': "v1", "k2": "v2", "k3": [11,22,33]}
dic['k3'].append(44)
print(dic)
Insert elements 18, the output of a modified dictionary k3 values corresponding to the position
dic = {'k1': "v1", "k2": "v2", "k3": [11,22,33]}
dic['k3'].append(44)
print(dic)
av_catalog = {
"Europe": {
". Www Bai .com": [ "a lot of free, the world's largest", "quality in general"],
"Www.alex.com": [ "a lot of free, is also great," "very good quality"],
"Oldboy.com": [ "mostly selfie, a lot of high-quality images," "limited resources, updating slow"],
"Hao222.com": [ "high quality, really high," "all charges, please bypass the Cock wire"]
},
"Japan and South Korea": {
"Tokyo-hot": [ "What quality do not know, personally do not like Japan and South Korea have been the norm", "verygood"]
},
"mainland":{
"1024": [ "all free, good, good life of peace", "server in a foreign country, slow"]
}
}
To this [ "a lot of free, the world's largest", "quality is generally"] list of second position to insert an element: 'significant amount'.
av_catalog [ "Western"] [ "www. Bai .com"]. insert (2, 'large amount') print (av_catalog)
This [ "high quality, really high," "all charges, please bypass Cock wire"] list of "all charges, Cock wire bypass the" Remove.
av_catalog["欧美"]["hao222.com"].pop(1) print (av_catalog)
This [ "Quality is not clear how the individual is no longer like the Japanese and Korean Fan", "verygood"] list "verygood" All capitalized.
av_catalog["日韩"]["tokyo-hot"][-1]='VVVVV' print (av_catalog)
To the 'mainland' corresponding dictionary to add a key-value pair '1048': [ 'day closure']
av_catalog [ "mainland"] [ "1048"] = [ "day closure '] print (av_catalog)
Delete this key-value pair: "oldboy.com": [ "mostly selfie, a lot of high-quality images," "limited resources, slow to update."]
To this [ "all free, good, good life of peace", "server in a foreign country, slow"] The first element of the list, add a sentence: 'can climb down'
Please print each cycle k2 corresponding element values.
info = {
'K1', 'v1',
'k2':[('alex'),('wupeiqi'),('oldboy')],
}
A character string "k: 1 | k1: 2 | k2: 3 | k3: 4" processed into a dictionary { 'k': 1, 'k1': 2 ....}
str1="k: 1|k1:2|k2:3 |k3 :4"
str1=str1.split('|')
dic = {}
for i in str1:
i1 = i.split ( ':')
dic[i1[0]]=i1[1]
print(dic)
-
write the code
""" Have the following values li = [11,22,33,44,55,66,77,88,99,90], all values greater than 66 will be saved to a list of the first dictionary corresponding to the key, will be less than 66 stored value to a second list corresponding to the key. result = {'k1':[],'k2':[]} """ = [11,22,33,44,55,66,77,88,99,90] result = {'k1':[],'k2':[]} for i in li: if i>66: result['k1'].append(i) elif i<66: result['k2'].append(i) print(result) Output: { 'k1': [77, 88, 99, 90], 'k2': [11, 22, 33, 44, 55]} """ -
Output of goods list, the user enters the serial number, the user selects the display of goods
""" Product List: goods = [ {"name": "电脑", "price": 1999}, {"name": "鼠标", "price": 10}, {"name": "游艇", "price": 20}, {"name": "美女", "price": 998} ] Claim: 1: The page number display + Product Name + commodity prices, such as: 1 PC 1999 2 mouse 10 for i in range(len(goods)): print(i+1,goods[i]['name'],goods[i]['price']) User input selection of goods number, then print Commodity Description and commodity prices for i in range(len(goods)): print(i+1,goods[i]['name'],goods[i]['price']) my_inpuy = input ( 'Enter the number of goods purchased') print ( 'are you purchased% s, the amount is% s'% (goods [int (my_inpuy) -1] [ 'name'], goods [int (my_inpuy) -1] [ 'price'])) 3: If the user enters the product number is incorrect, you are prompted an error, and re-enter. 4: a user input Q or q, exit the program. while 1: goods = [ {"name": "电脑", "price": 1999}, {"name": "鼠标", "price": 10}, {"name": "游艇", "price": 20}, {"name": "美女", "price": 998}] for i in range(len(goods)): print(i+1,goods[i]['name'],goods[i]['price']) my_input = input ( 'Enter the number of goods purchased') if my_input.isdecimal(): if int(my_input)>len(goods): print ( 'the number you entered is too big') elif 1<= int(my_input)<=len(goods): print ( 'are you purchased% s, the amount is% s'% (goods [int (my_input) -1] [ 'name'], goods [int (my_input) -1] [ 'price'])) else: print ( 'You have entered incorrect') elif my_input.upper()=='A': print ( 'exit') break else: print ( 'Enter a number ooooooooooooooooo pro') """ -
Look at the code written results
v = {} for index in range(10):#[1---9] v['users'] = index print (v) #{'users': 9}
# Print the number of rows outer loop
* Number of inner loop Print #
# For nested while
# count=1
# for i in range(1,6):
# while count==i:
# print('*'*i)
# count+=1
#for for nesting
# for i in range(1,6):
# for j in range(1,i+1):
# if i==j:
# print(j*'*',end='')
# print()
# While for nesting
# count=1
# while count<6:
# for i in range(count+1):
# if i==count:
# print('*'*i)
# count+=1
#while 嵌套 while
# i,j=1,1
# while i<7:
# while j<i:
# print('*'*j)
# j+=1
# i+=1
@Wang Sir