zprint

x id print (x + 5) # Use the variable print ("=========== gorgeous split line ========= ") x = 2 # define a variable xprint (id (x) # The variable x is a new variable print (x + 5) # The name is the same, however, the new variable x is used. Continue assignment x = 'hello python'print(id(x))print(x) At this time, x becomes a new variable, and the variable type also changes due to the change of the assigned data type. Here, id () is a Python built-in function. See https://docs.python.org/3/libra

print ("=========== gorgeous split line ========= ") x = 2 # define a variable xprint (id (x) # The variable x is a new variable print (x + 5) # The name is the same, however, the new variable x is used. Continue assignment x = 'hello python'print(id(x))print(x) At this time, x becomes a new variable, and the variable type also changes due to the change of the assigned data type. Here, id () is a Python built-in function. See https://docs.python.org/3/library/functions.html#id If the variable i

return value, and the EXEC () function return value is always none. x = 10def func (): y = $ a = EXEC (' x + y ') print (' A: ', a) B = Exec (' x + y ', {' X ': 1, ' Y ': 2}) print (' B: ', B ' c = exec (' x + y ', {' X ': 1, ' Y ': 2}, {' Y ': 3, ' Z ': 4}) print (' C: ', c) d = EXEC (' Print (x, y) ') PR Int (' d: ', D) func ()OutputA: noneb: nonec: None10 20d: Nonex = 10expr = "" "z = 30sum = x + y + zprint (sum

DOMAIN from the database-- Data ControlGRANT -- GRANT the user access permissionDENY-DENY User AccessREVOKE -- REVOKE User Access Permissions-- Transaction controlCOMMIT -- end the current transactionROLLBACK -- abort the current transactionSet transaction -- define the data access features of the current TRANSACTION-- Programmatic SQLDECLARE -- set the cursor for the queryExplain -- describe the data access plan for queryOPEN -- OPEN a cursor for retrieving query resultsFETCH -- retrieve a row

-- Data Control Grant -- Grant the user access permission Deny-Deny User Access Revoke -- revoke User Access Permissions -- Transaction control Commit -- end the current transaction Rollback -- abort the current transaction SET transaction -- define the data access features of the current transaction -- Programmatic SQL Declare -- set the cursor for the query Explain -- describe the data access plan for query Open -- open a cursor for retrieving query results Fetch -- retrieve a row of query re

]# print (L[0:4:2]) # # S=slice ( 0,4,2) # Print (L[s]) #sorted # l=[1,10,4,3,-1]# print (sorted (l,reverse=true)) #sum # Print (sum ([1, 2,3]) # # print (SUM (i For I in range) #vars # import m1# print (VARs (m1) = = m1.__dict__) #zip: Zip # s= ' hellosssssssssssssssss ' # l=[1,2,3,4,5]## Print (list (Zip (s,l))) #__import__import sys# m_name=input (' Module>>:') # if m_name = = ' sys ': # m=__import__ (m_name) # print (M) # print (M.path) # # sys=__import__ (' sys ') # print (SYS) #rou Ndprint

multiple parameters), followed by only a single expression as the body of the function, and the value of the expression is returned by the new function. Note that even print Statement also cannot be used in lambda form, only expressions are used. Let's look at more examples:1 for single parameters:g = Lambda x:x*2print (g (3))The result is 6, the analysis (x is the formal parameter of the function, x*2 is the function body)More than 2 parameters:m = lambda x, y, Z: (x-y) *

specified range (this character is defined in parentheses)[] Write what is its individual meaning, can write 0-9 a-za-zPrint (Re.findall (' a[0-9][0-9]c ', ' A1c a+c a2c a9c a11c a-c acc aAc '))When-needs to be matched by a common symbol, it can only be placed on the leftmost or rightmost side of []A-B has a special meaning, so if you want to-show it itself, put it on the leftmost or the rightPrint (Re.findall (' a[-+*]c ', ' A1c a+c a2c a9c a*c a11c

', ' 2 ', ' 3 ']Print (Re.findall (' \w ', ' Hello Egon 123 ')) #[', ']#\s and \sPrint (Re.findall (' \s ', ' Hello Egon 123 ')) #[', ', ', ']Print (Re.findall (' \s ', ' Hello Egon 123 ')) #[' h ', ' e ', ' l ', ' l ', ' o ', ' e ', ' g ', ' o ', ' n ', ' 1 ', ' 2 ', ' 3 ']#\n \ t are all empty and can be \s matchedPrint (Re.findall (' \s ', ' hello \ n egon \ 123 ')) #[', ' \ n ', ' ', ' ', ' \ t ', ']#\n and \ tPrint (Re.findall (R ' \ n ', ' Hello Egon \n123 ')) #[' \ n ']Print (Re.findall

Control Grant--Grant user access Deny--Deny user access REVOKE--Unblock user access --transaction control COMMIT--End current transaction ROLLBACK--Abort current transaction Set TRANSACTION--Define current transactional data access characteristics --Programmatic SQL DECLARE--set cursor for query Explan--Describe data access plan for query Open--Retrieve query result opens a cursor FETCH--Retrieves a row of query results Close--close cursor PREPARE--Prepare SQL statement for dynamic

B:b**3] There is no way to replace the DEF statement directly in this place. Because DEF is a statement, not an expression that cannot be nested inside, a lambda expression can have only one expression after ":". That is, in Def, return can also be placed behind a lambda, and cannot be returned with return can not be defined behind a Python lambda. Therefore, a statement such as if or for or print cannot be used in a lambda, and lambda is generally used only to define simple functions. Let's g

just an expression, and DEF is a statement.The following is a Python lambda format that looks good and streamlined. Lambda X:print x If you use Python lambda in the Python list parsing, I don't feel much of a thing because Python lambda creates a function object, but discards it immediately, because you're not using its return value, which is the function object. It is also because Lambda is just an expression that can be directly a member of a Python list or a Python dictionary, such as: info

DOMAIN from the database-- Data ControlGRANT -- GRANT the user access permissionDENY-DENY User AccessREVOKE -- REVOKE User Access Permissions-- Transaction controlCOMMIT -- end the current transactionROLLBACK -- abort the current transactionSet transaction -- define the data access features of the current TRANSACTION-- Programmatic SQLDECLARE -- set the cursor for the queryExplain -- describe the data access plan for queryOPEN -- OPEN a cursor for retrieving query resultsFETCH -- retrieve a row

-- retrieve a row of query resultsCLOSE -- CLOSE the cursorPREPARE -- prepare SQL statements for dynamic executionEXECUTE -- dynamically execute SQL statementsDESCRIBE -- DESCRIBE the prepared Query--- Local variablesDeclare @ id char (10)-- Set @ id = '20140901'Select @ id = '000000'--- Global variables--- It must start @-- IF ELSEDeclare @ x int @ y int @ z intSelect @ x = 1 @ y = 2 @ z = 3If @ x> @ yPrint 'x> y' -- print the string 'x> y'Else if @ y> @ z