A few of the guys I met today don't know how to function.

Several unfamiliar functions in Python

1. List ()

Convert tuples to lists

2, Random.sample (range (16), 2)

Select any of the two numbers in 0-15

3. Print output line in Python. If you want to output more than the content of the line, you can add a comma after print

4, Choice ()

The choice () function is a random item that returns a list, tuple, or string

5. Input () and raw_input ()

Input transforms the appropriate type according to the user input, and if you want to enter characters and strings, you must enclose them in quotation marks, and raw_input will be converted to a string regardless of what type the user enters.

6.format () function

Format the function of the string s format Tr.format (), with the% format can be compared with each other, through {} and: instead of%

eg

By location

In[1]: ' {0},{1} '. Format (' Kzc ', 18)

OUT[1]: ' kzc,18 '

In[1]: ' {},{} '. Format (' Kzc ', 18)

OUT[2]: ' kzc,18 '

In[3]: ' {1},{0},{1} ' format (' Kzc ', 18)

OUT[3]: ' 18,kzc,18 '

The Format function of a string can accept an unlimited number of arguments, and the position can be out of order, without or using multiple

by keyword parameter:

IN[5]: ' {name},{age} '. Format (age=18,name= ' KZC ')

OUT[5]: ' kzc,18 '

Through object properties:

Class Person:

def __init__ (self,name,age):

Self.name,self.age = Name,age

def __str__ (self):

Return ' This guy was {self.name},is{self.age} old '. Format (self.self)

IN[2]:STR (Person (' kzc ', 18))

OUT[2]: ' This guy is KZC

by subscript:

IN[7]:p =[' kzc ', 18]

In[8]: ' {0[0]},{0[1]} '. Format (P)

OUT[8]: ' kzc,18 '

Python knowledge tells us that list and tuple can be "broken" into normal parameters to the function, and dict can be broken into the keyword to the function (through *)

Format qualifier

It has a rich "format qualifier" (syntax is {} with:), such as:

Fill and align

Padding is used in conjunction with alignment

^,<,> are centered, left-aligned, right-aligned, followed by width

: The fill character after the number, can only be a character, if not specified, the default is to fill with a space

IN[15]: ' {: >8} '. Format (' 189 ')

OUT[15]: ' 189 '

In[16]:]:0>8].format (' 189 ')

OUT[16]: ' 00000189 '

IN[17]: ': a>8 '. Format (189)

OUT[17]: ' aaaaa189 '

Accuracy and type F

Accuracy is often used in conjunction with Type F

IN[44]: ':. 2f '. Format (321.33345)

OUT[44]: ' 321.33

Other types
Mainly in the system, B, D, O, X are binary, decimal, octal, hexadecimal.

12345678

In [54]: ‘{:b}‘.format(17)Out[54]: ‘10001‘In [55]: ‘{:d}‘.format(17)Out[55]: ‘17‘In [56]: ‘{:o}‘.format(17)Out[56]: ‘21‘In [57]: ‘{:x}‘.format(17)Out[57]: ‘11‘

Use, the number can also be used to make the amount of thousands separator.

?

12	In [47]: ‘{:,}‘.format(1234567890)Out[47]: ‘1,234,567,890‘

‘

A few of the guys I met today don't know how to function.