python basis --random bag, string bag

random random bag

>>> Import Random introducing random packet # 
# take random integer
 >>> Random. The randint (1,10 )
 . 4 
# specified step length taken boast random integer 
>>> Random. Randrange (1, 10, ) randomly # between the odd-numbered 1-10
 . 9 
>>> random.randrange (0, 10 )
 2
 
# to random decimal between 0-1 
>>> random. random ()
 0.25631948996842346 

# take the specified interval random fractional 
>> > random. Uniform (1,10 )
 3.1196351125028334 
>>> random.uniform (1,10 )
 5.857263369842762 
>>> # a randomly chosen character 
>>> random.choice('abcdefg

' )
 ' F ' 
# specified number of characters randomly 
>>> Random. Sample ( ' ABCDEFG ' ,. 3 ) 
[ ' F ' , ' D ' , ' E ' ] 

# disrupted sort of random, only for a listing; original scrambled to: change the order of the original list, and does not return value returned is None
 >>> S = [1,2,3,4,5 ]
 >>> Random. shuffle (S)
 >>> S 
[ . 3 , 4, 1, 2, 5] 



# ten randomly generated lowercase

>>> result =""
>>> for i in range(10):
...     result +=chr(97+random.randint(1,25))
...
>>> print(result)
iiixvsfltw

 

# Generate a random number is not limited to the case of letters 10

>>> result=""
>>> lower_case_letter_num = random.randint(1,9)
>>> upper_case_letter_num = 10-lower_case_letter_num
>>> for i in range(lower_case_letter_num):
... result +=chr(ord("a")+random.randint(1,25))
...
>>> for i in range(upper_case_letter_num):
... result +=chr(ord("A")+random.randint(1,25))
...
>>> print(result)
ypskdkIDTN

 

 

 

 

 

string bag

>>> Import string   # Import string package
 >>> the dir (string)    # view the bag which method 
[ ' the Formatter ' , ' Template ' , ' _ChainMap ' , ' _TemplateMetaclass ' , ' __all__ is ' , ' __built 
ins__ ' , ' __cached__ ' , ' the __doc__ ' , ' __FILE__ ' , ' __loader__ ', '__name__', '__packag
e__', '__spec__', '_re', '_string', 'ascii_letters', 'ascii_lowercase', 'ascii_u
ppercase', 'capwords', 'digits', 'hexdigits', 'octdigits', 'printable', ' Punctua 
tion of ' , ' whitespace ' ] 
>>> string.ascii_letters    # acquired all letters (uppercase and lowercase)
 ' ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz ' 
>>> string.ascii_lowercase    # Get all lowercase letters
 ' ABCDEFGHIJKLMNOPQRSTUVWXYZ ' 
>>> string.ascii_uppercase     # get all capital letters
 ' ABCDEFGHIJKLMNOPQRSTUVWXYZ ' 
>>> string.digits    # get all digital
 ' 0123456789 '

 

 

Exercise:

# Generate the specified number of characters from random-zA-Z0-9 A: 
>>> string.ascii_letters
 ' ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz ' 
>>> string.digits
 ' 0123456789 ' 
>>> random.sample (string.ascii_letters + string.digits,. 8 ) 
[ ' n- ' , ' Q ' , ' F ' , ' . 7 ' , ' L ' , ' P ' , ' the I ' , 'and ' ]
>>> ''.join(random.sample(string.ascii_letters+string.digits,8))
'GgHXmqbj'
>>> ''.join(random.sample(string.ascii_letters+string.digits,8))
'XFCf2KvQ'