strings, numbers, lists, meta-ancestors, dictionaries convert each other
What is the conversion between 1 Int and STR, and what is the result of the transformation? Is there a condition?
#str (int) can be converted to str the process has no conditions #字符串转化为数字必须全部由数字组成 How can I convert between 2 Int and bool by Int (str type), and what is the result of the conversion? Is there a condition? # int conversion to bool no condition, except 0 conversion to false other numbers are converted to True bool (number of int) #int (False) = 0; int (True) = 1 3 str and bool conversions, What is the result of the conversion? There are no conditions for? #str conversion to bool without conditions, NULL string conversion to a Boolean value of false  F non-null to True bool (SRR type) #str (true) = ' true ' str (False) = ' flase ' str and list can I convert? How to convert? # can str>>list 1. 2.list (str string) with split cut #可以 list>>str 1. Using join+ Iteration 2. str (list listing) example
# ret15 = ' jinxin Alex Wusir '
# ret16 = Ret15.split ()
# Print (ret16)
[' Jinxin ', ' Alex ', ' Wusir ']
# ret15 = ' Jinxin,alex,wusir ' split. (', ') comma string format to make a list of the entire string
# ret16 = Ret15.split (', ')
# Print (ret16)
[' Jinxin ', ' Alex ', ' Wusir ']
# ret15 = ' title Tle tlie '
# ret16 = ret15.split (' t ')
# Print (ret16)
[', ' I ', ' le ', ' le ', ' lie '] What splits that element is deleted as a split point.
Turn the list into a string "' Out is the string
L1 = [' jinxin ', ' Alex ', ' Wusir ']
Li = ". Join (L1)
Print (LI)
Jinxin Alex Wusir
# to False
#0, "", {},[], (), set ()
# # # #字符串与列表互转 # string to list Listl = ' ab_c ' Print (List (' Ab_c '), type (' Ab_c ')) #列表转字符串使用 joinl1 = [' 1 ', ' 2 ', ' 3 ']str = '. Join (l 1) Notice that the string between the strings is empty, so come out is 123print (Str,type (str)) 123li = [' Alex ', ' rain ']temp = '. Join (LI) print (Temp,type (temp)) #元组与列表互转 # tuple to list plus Listtu = (in a.) L = List (TU) print (L,type (l)) l= [1,2,3]# # # list to tuple plus tupleli = [4,5,6]print (Tuple (LI), type (tuple ( LI)))
Python base data types are converted to each other