1. Write the code, the following list, each function according to requirements
And outputs the calculated length of the list
li = ["alex", "WuSir", "ritian", "barry", "wenzhou"]
print(li[0:4])
Results: [ 'alex', 'WuSir', 'ritian', 'barry']
List of lists of additional elements "seven", and add the output
li = ["alex", "WuSir", "ritian", "barry", "wenzhou"]
li.append("seven")
print(li)
结果：['alex', 'WuSir', 'ritian', 'barry', 'wenzhou', 'seven']
In the first of a list of locations to insert elements "Tony", and outputs the list to add
li = ["alex", "WuSir", "ritian", "barry", "wenzhou"]
li.insert(0, "Tony")
print(li)
结果：['Tony', 'alex', 'WuSir', 'ritian', 'barry', 'wenzhou']
Please modify the list of elements of the 2nd position as "Kelly", and outputs the modified list
li = ["alex", "WuSir", "ritian", "barry", "wenzhou"]
li.insert(1, "Kelly")
print(li)
结果：['alex', 'Kelly', 'WuSir', 'ritian', 'barry', 'wenzhou']
Please list l2 = [1, 3,4, "heart" "a",] each li element added to the list, the line of code to achieve, does not allow the cycle is added.
li = ["alex", "WuSir", "ritian", "barry", "wenzhou"]
l2=[1,"a",3,4,"heart"]
print(li+l2)
结果：['alex', 'WuSir', 'ritian', 'barry', 'wenzhou', 1, 'a', 3, 4, 'heart']
Enclose the string s = "qwert" each li element added to the list, the line of code to achieve, does not allow the cycle is added.
li = ["alex", "WuSir", "ritian", "barry", "wenzhou"]
li.extend("qwert")
print(li)
结果：['alex', 'WuSir', 'ritian', 'barry', 'wenzhou', 'q', 'w', 'e', 'r', 't']
Please delete the list of elements in the list "ritian", and add the output
li = ["alex", "WuSir", "ritian", "barry", "wenzhou"]
li.pop(2)
print(li)
Results: [ 'alex', 'WuSir', 'barry', 'wenzhou']
Please delete a list after list of two elements, and output elements and remove elements deleted
li = ["alex", "WuSir", "ritian", "barry", "wenzhou"]
print(li.pop(1))
print(li)
Results: WuSir
[ 'Alex', 'ritian', 'Barry', 'Wenzhou']
Please delete a list after list of 2-4 elements, remove elements and output
li = ["alex", "WuSir", "ritian", "barry", "wenzhou"]
del li[1:5]
print(li)
Results: [ 'alex']
2. Write code that has the following list, use slices to achieve each function
L1 formed by slicing a new list of li list, l1 = [1,3,2]
li = [1, 3, 2, "a", 4, "b", 5,"c"]
print(li[0:3])
Li is formed by slicing a list of new list l2, l2 = [ "a", 4, "b"]
li = [1, 3, 2, "a", 4, "b", 5,"c"]
print(li[3:6])
L3 is formed by slicing a new list of li list, l3 = [ "1,2,4,5]
li = [1, 3, 2, "a", 4, "b", 5,"c"]
print(li[0::2])
L4 is formed by slicing a new list of li list, l4 = [3, "a", "b"]
li = [1, 3, 2, "a", 4, "b", 5,"c"]
print(li[1::2])
L5 is formed by slicing a new list of li list, l5 = [ "c"]
li = [1, 3, 2, "a", 4, "b", 5,"c"]
print(li[7])
The new list is formed by slicing li list l6, l6 = [ "b", "a", 3]
li = [1, 3, 2, "a", 4, "b", 5,"c"]
print(li[-1::-2])
3. Write code that has the following list, as required to achieve each function.
Lis in the list of "tt" capitalized (two ways).
lis = [2, 3, "k", ["qwe", 20, ["k1", ["tt", 3, "1"]], 89], "ab", "adv"]
lis[3][2][1][0] =lis[3][2][1][0].upper()
print(lis)
lis = [2, 3, "k", ["qwe", 20, ["k1", ["tt", 3, "1"]], 89], "ab", "adv"]
lis[3][2][1][0]='TT'
print(lis)
3, the list of numbers into character string "100" (in two ways).
lis = [2, 3, "k", ["qwe", 20, ["k1", ["tt", 3, "1"]], 89], "ab", "adv"]
lis[3][2][1][1]='100'
lis[1]='100'
print(lis)
lis = [2, 3, "k", ["qwe", 20, ["k1", ["tt", 3, "1"]], 89], "ab", "adv"]
lis[3][2][1][1:2] = ["100"]
print(lis)
List string "1" to numeral 101 (in two ways).
lis = [2, 3, "k", ["qwe", 20, ["k1", ["tt", 3, "1"]], 89], "ab", "adv"]
lis[3][2][1][2]='101'
print(lis)
lis = [2, 3, "k", ["qwe", 20, ["k1", ["tt", 3, "1"]], 89], "ab", "adv"]
lis[3][2][1][-1:] = [101]
print(lis)
4. implemented in code:
Underline the use of each element of the list spliced into the string "alex_wusir_taibai"
li = ["alex", "wusir", "taibai"]
lis = li[0] + "_" + li[1] + "_" + li[2]
print(lis)
The use for the index print range loop and the following list.
li = ["alex", "WuSir", "ritian", "barry", "wenzhou"]
for li in range(0,5):
print(li)
6. The use for loop and within the range 100 to find all of these and even-even inserted into a new list.
li = []
for i in range(2,101,2):
li.append(i)
print(i)
7. Use for loop and to identify within the range 503 can be divisible, and insert these numbers into a new list.
li = []
for i in range(3,51):
if i % 3 == 0:
li.append(i)
print(i)
8. The use for loop and range from 100 to 1, reverse printing.
li = []
for i in range(100,0,-1):
if i < 100:
li.append(i)
print(i)
9. The use for loop and range from 100 to 10, all even reverse added to a new list, then the list of filter elements, the number divisible by four stay.
li = list(range(100,9,-2))
for i in li:
if i % 4 != 0:
li.remove(i)
print(li)
10. The use for loop and Range, will add a digital 1-30 into a list, the list and the cycle will be changed to a number divisible by 3 *.
li = list(range(30,0,-1))
for i in li:
if i % 3 == 0:
li[li.index(i)] = "*"
print(li)