The 13th lesson of Python Learning-other data types, others

Enumerate (iterable,start=0)

(the subscript start position of the custom list) list variables, to define the number of open: default is 0 start

#!/usr/bin/env python#-*-coding:utf-8-*-a=["Juvenile","Youth","Adult","old age"] forKvinchEnumerate (a,1):    Print(k,v)#Print 1 Teenager 2 Youth 3 adult 4 old

Enumerate () Combine the application, enter the life stage serial number, print out the corresponding stage

#!/usr/bin/env python#-*-coding:utf-8-*-a=["Juvenile","Youth","Adult","old age"] forKvinchEnumerate (a,1):    Print(k,v) b=input ("Please enter the life stage number:") C=Int (b) d=A[c]Print(d)#input 1 Print youth

Range () automatically creates a list (py2.7 version)

(Automatically create list, less than how many start to create, greater than how many start to stop, create list interval number default can not write)

# !/usr/bin/env python # -*-coding:utf-8-*-a=range (1,11)print(a)#[1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ]

Xrange () Auto-Create list (py2.7 version)

Unlike range, xrange requires a for loop before it is created

# !/usr/bin/env python # -*-coding:utf-8-*-a=xrange (1,11) for in A:    print(b )# Print 1 2 3 4 5 6 7 8 9

Range can also create a list from large to small

format : Ragne (max, Min, step)

Note: The decimal number itself cannot be taken, from large numbers to decimals whose step size is negative

such as: printing 10 9 8 7 6 5 4 3 2 1

Range (10,0,-1)

# !/usr/bin/env python # -*-coding:utf-8-*-a=range (10,0,-1) for in A:    Print  (b) # Print 9 8 7 6 5 4 3 2 1

The 13th lesson of Python Learning-other data types, others