第三章练习题

3-1
names = ['Chole','Lucy','Jack']

for name in names:

print(name)



3-2
names = ['Chole','Lucy','Jack']

for name in names:

print(name + ", how are you?")



3-5
names = ['Chole','Lucy','Jack']

for name in names:
print(name + ", would you like to join my party?")
print(names[2] + " can't join it because of work.")

names[2] = 'Mary'
for name in names:

print(name + ", would you like to join my party?")



3-7
names = ['Chole','Lucy','Jack']

for name in names:
print(name + ", would you like to join my party?")
print(names[2] + " can't join it because of work.")

names[2] = 'Mary'
for name in names:
print(name + ", would you like to join my party?")
print("We have had a more table.")

names.insert(0,'Kate')
names.insert(2,'Jim')
names.append('Emily')

for name in names:
print(name + ", would you like to join my party?")
print("We are sorry about that we can only invite 2 person.")

a = names.pop()
print("We are sorry, " + a)
a = names.pop()
print("We are sorry, " + a)
a = names.pop()
print("We are sorry, " + a)
a = names.pop()
print("We are sorry, " + a)

for name in names:
print(name + ", we're happy that you will be still there.")
del names
print(names)





3-8
# coding=utf-8
countries = ['Germany', 'America', 'Austrilia', 'Japan', 'New Zealend']
print(countries)
print(sorted(countries))
print(countries)
print(sorted(countries,reverse = True))
print(countries)
countries.reverse()
print(countries)
countries.reverse()
print(countries)
countries.sort()
print(countries)
countries.sort(reverse = True)

print(countries)



3-9
names = ['Chole','Lucy','Jack']
names[2] = 'Mary'

names.insert(0,'Kate')
names.insert(2,'Jim')
names.append('Emily')

print(len(names))