Python100经典练习题.pdf（附答案）

>>> import copy>>> b=copy.deepcopy(a)

>>> b=copy.copy(a)

>>> mylist=[1,3,3]>>> mylist[1]=2>>> mytuple=(1,3,3)>>> mytuple[1]=2Traceback (most recent call last):File "", line 1, in mytuple[1]=2

TypeError: ‘tuple’ object does not support item assignment

[on true] if [expression] else [on false]

>>> a,b=2,3>>> min=a if a>>> min
运行结果：2>>> print("Hi") if a
运行结果：Hi

>>> import copy>>> help(copy.copy)

Help on function copy in module copy:copy(x) Shallow copy operation on arbitrary Python objects. See the module’s __doc__ string for more info.

>>> dir(copy.copy)

>>> class A:def func(self):        print("Hi")>>> def monkey(self):print "Hi, monkey">>> m.A.func = monkey>>> a = m.A()>>> a.func()

>>> roots={25:5,16:4,9:3,4:2,1:1}>>> type(roots)>>> roots[9]

>>> roots={x**2:x for x in range(5,0,-1)}>>> roots

>>> def func(*args):for i in args:print(i)  >>> func(3,2,1,4,7)

>>> def func(**kwargs):for i in kwargs:print(i,kwargs[i])>>> func(a=1,b=2,c=7)

>>> import os
>>> os.chdir('C:\\Users\\lifei\\Desktop')>>> with open('Today.txt') as today:    count=0for i in today.read():if i.isupper():            count+=1print(count)

>>> mylist=[0,1,2,3,4,5,6,7,8]

>>> mylist[-3]

>>> mylist[-6:-1]

>>> from random import shuffle>>> shuffle(mylist)>>> mylist

>>> ','.join('12345')

>>> '1,2,3,4,5'.split(',')

>>> myname='Ayushi'>>> MynameTraceback (most recent call last):File "", line 1, in 

>>> '   Ayushi '.lstrip()

>>> '   Ayushi '.rstrip()

>>> 'AyuShi'.lower()

>>> 'AyuShi'.upper()

>>> 'AyuShi'.isupper()False
>>> 'AYUSHI'.isupper()True
>>> 'ayushi'.islower()True
>>> '@yu$hi'.islower()True
>>> '@YU$HI'.isupper()True

>>> 'The Corpse Bride'.istitle()True

>>> def func(*args):           pass >>>

>>> for i in range(7):if i==3: breakprint(i)

>>> for i in range(7):if i==3: continueprint(i)

>>> def A(x):def B():        print(x)return B>>> A(7)()

>>> 7//23

>>> 2**101024

>>> 13%76>>> 3.5%1.50.5

>>> 7+815

>>> 7-8-1

>>> 7*856

>>> 7/80.875>>> 1/11.0

>>> 'hi'<'Hi'False

>>> 1.1+2.2>3.3True

>>> 3.0<=3True

>>> True>=FalseTrue

>>> {1,3,2,2}=={1,2,3}True

>>> True!=0.1True>>> False!=0.1True

>>> a=7>>> a+=1>>> a8
>>> a-=1>>> a7
>>> a*=2>>> a14
>>> a/=2>>> a7.0 
>>> a**=2>>> a49
>>> a//=3>>> a16.0
>>> a%=4>>> a0.0

>>> False and TrueFalse
>>> 7<7 or TrueTrue
>>> not 2==2False

>>> 'me' in 'disappointment'True
>>> 'us' not in 'disappointment'True

>>> 10 is '10'False
>>> True is not FalseTrue

>>> 0b110 & 0b0102

>>> 3|23

>>> 3^21

>>> ~2-3

>>> 1<<24

>>> 4>>21

>>> int(0b1010)10

>>> bin(0xf)‘0b1111’

>>> oct(8)‘0o10’

>>> hex(16)‘0x10’
>>> hex(15)‘0xf’

>>> mydict={'a':1,'b':2,'c':3,'e':5}>>> mydict.keys()dict_keys(['a', 'b', 'c', 'e'])

>>> a,b,c=3,4,5 #This assigns 3, 4, and 5 to a, b, and c respectively>>> a=b=c=3 #This assigns 3 to a, b, and c

>>> mytuple=3,4,5>>> mytuple(3, 4, 5)

>>> x,y,z=mytuple>>> x+y+z