python-Data Operations

Arithmetic operations

Example:ArithmeticOperator.py

#!/bin/env python#-*-coding:utf-8-*-__author__ = ' Stephen ' # set the initial value of A and Bprint ("%s%s%s"% ("=", "s Tart "," = "*)) A = 3b = 2print (" a=%s "% a) print (" b=%s "% B) # start Calculateprint ("%s%s%s "% (" = "," calculate "," = ") # A+bprint ("a+b=%s"% (a+b)) # A-bprint ("a-b=%s"% (a)) # A*bprint ("a*b=%s"% (a*b)) # A/bprint ("a/b=%s"% (A/b)) # A%bprint (" a%%b=%s "% (a% b)) # A**bprint (" a**b=%s "% (a**b)) # End of the Testprint ("%s%s%s "% (" = "," End "," = ")

Operation Result:

====start====a=3b=2====calculate====a+b=5a-b=1a*b=6a/b=1a%b=1a**b=9====end====

Comparison operation

Example:ComparisonOperator.py

#!/bin/env python#-*-coding:utf-8-*-__author__ = ' Stephen ' def num_compare (A, B): Print ("%s%s%s"% ("=", "Start", " = "*)" Print ("a=%s"% a) print ("b=%s"% b) # Start compare print ("%s%s%s"% ("=" *10, "compare", "=" *10)) #    If a=b? If a = = B: # Print (U "a equals B") print ("A is equal to B") Else: # Print (U "a not equals B") print ("A is no        T equal to B ") # if a!=b?, Type 1 if a! = B: # Print (U" a not equals B ") print (" A is not equal to B ") Else: # Print (U "a equals B") print ("A is equal to B") # if a!=b?, Type 2--and (deprecated) # This writing is about to be discarded if a <> B: # Print (U "a not equals B") print ("A is not equal to B") Else: # Print (U "a equals B") print ("A    is equal to B ") # if a<b?  If a < b: # print (U "a less than B") print ("A smaller than B") Else: # Print (U "A is not less than B") print ("A is    Not smaller than B ") # if a>b? If a > B: # Print (U "a greater than B") print ("A isLarger than B ") Else: # Print (U" a not less than B ") print (" A is not larger than B ") print ("%s%s%s "% (" = "*20," end "," = "*20)) # Round 1num_compare (3, 2) # Round 2num_compare (2, 3) # Round 3num_compare (2, 2)

Run results

====start====a=3b=2==========compare==========a isn't equal to BA are not equal to BA are not equal to BA are not smaller th An BA was larger than B====================end========================start====a=2b=3==========compare==========a is Not equal to BA isn't equal to BA are not equal to BA smaller than BA are not larger than b====================end========= ===============start====a=2b=2==========compare==========a is equal to BA are equal to BA are equal to BA are not smaller tha n BA is not larger than b====================end====================

　

Assignment operations

Example:AssignmentOperator.py

#!/bin/env python#-*-coding:utf-8-*-__author__ = ' Stephen ' def Set_initial_value (): # Set the initial value of the Nu    Mbers. Print ("%s%s%s"% ("=", "Initial value start", "=")) Global a Global B global C1 global C2 a = 3 B = 2 C1 = C2 = ten print ("a=%s"% a) print ("b=%s"% b) print ("c1=%s"% c1) print ("c2=%s"% C2) # Print  ("%s%s%s"% ("=", "Initial value End", "=") # Assignment Operator test# Simple assignment Operation Set_initial_value () C1 = a + bprint ("C1 = A + b ====>%s "% C1) # addition operator Set_initial_value () C1 + = AC2 = C2 +aprint (" C1 + = a ====>%s "% C1) Print (" C2 = C2 +a = = = = =%s "% C2) # subtraction operator Set_initial_value () C1-= AC2 = C2-aprint (" C1-= a ====>%s "% C1) Print (" C2 = c2-a ====>%s " % C2) # multiplication operator Set_initial_value () c1 *= AC2 = C2 * Aprint ("C1 *= a ====>%s"% C1) Print ("C2 = C2 * A ====>%s"% C2) # except Method operator Set_initial_value () c1/= AC2 = C2/aprint ("C1/= a ====>%s"% C1) Print ("C2 = c2/a ====>%s"% C2) # modulo operator set_ Initial_value () C1%= AC2 = c2% aprint ("C1%%= a ====>%s"% C1) Print ("C2 = C2 percent a ====>%s"% C2) # Power assignment operator Set_initial_value () C1 * *= AC2 = C2 * * Aprint ("C1 **= a ====>%s"% C1) Print ("C2 = C2 * * A ====>%s"% C2) # take divisible operator set_initial_value () C1//= AC2 = C2//Aprint ("C1//= a ====>%s"% C1) Print ("C2 = C2//A ====>%s"% C2)

Operation Result:

====initial value start====a=3b=2c1=10c2=10c1 = a + b ====> 5====initial value start====a=3b=2c1=10c2=10c1 + = a ====> ; 13c2 = C2 +a ====> 13====initial value start====a=3b=2c1=10c2=10c1 = a ====> 7c2 = c2-a ====> 7====initial valu E start====a=3b=2c1=10c2=10c1 *= a ====> 30c2 = C2 * A ====> 30====initial value start====a=3b=2c1=10c2=10c1/= A = = ==> 3c2 = c2/a ====> 3====initial value start====a=3b=2c1=10c2=10c1%= a ====> 1c2 = c2% a ====> 1====initi Al value Start====a=3b=2c1=10c2=10c1 **= a ====> 1000c2 = C2 * * A ====> 1000====initial value start====a=3b=2c1=10c2 =10C1//= a ====> 3c2 = c2//a ====> 3

　　

Logical operations

Example:LogicalOperator.py

#!/bin/env python#-*-coding:utf-8-*-__author__ = ' Stephen ' # Definitiona = Trueb = Falsec = trued = Falseprint ("%s%s%s" % ("-" *10, "basic Test Start", "-" *10)) # Test and Operatorprint ("%s%s%s ====>%s"% (A, "and", B, A and b)) print ("%s  %s%s ====>%s "% (A," and ", C, A and C)) print ("%s%s%s ====>%s "% (b," and ", C, B and C)) print ("%s%s%s ====> %s "% (b," and ", D, b and D)) # Test or Operatorprint ("%s%s%s ====>%s "% (A," or ", B, A or b)) print ("%s%s%s ====&G T  %s "% (A," or ", C, a or c)) print ("%s%s%s ====>%s "% (b," or ", C, b or C)) print ("%s%s%s ====>%s "% (b," or ", D, B or D) # test not Operatorprint ("%s%s ====>%s"% ("no", a, not a)) print ('%s%s ====>%s '% ("not", B, not B)) Print ("%s%s%s"% ("-" *10, "basic Test End", "-" *10)) print ("%s%s%s"% ("-" *10, "number Test start", "-" *10)) # Test number C alculation# 0 ==> false# non 0 ==> truew = 0x = 2y = -1z = 0#print ("%s%s%s ====>%s"% (x, "and", Y, x and y) prin T ("%s%s%s ====>%s "% (x," and ", Z, X and z)) print ("%s%s%s ====>%s "% (x," or ", y, x or y)) print ("%s%s%s ====>%s "% (x," or ", Z, x or z) print ("%s%s%s ====>%s"% (W, "and", Z, W and z)) print ("%s%s%s ====>%s"% (W, "and", X, W and X) PRI NT ("%s%s%s ====>%s"% (W, "or", Z, W or z)) print ("%s%s%s"% ("-" *10, "number Test End", "-" *10))

Operation Result:

----------Basic Test Start----------true and False ====> Falsetrue and True ====> TrueFalse and True ====> Falsef Alse and False ====> Falsetrue or false ====> Truetrue or True ====> TrueFalse or True ====> TrueFalse or Fals E ====> falsenot  true ====> falsenot  False ====> true----------Basic test End--------------------Number Test start----------2 and-1 ====> -12 and 0 ====> or-1 ====> or 0 ====> 0 ====> and 2 ====> or 0 ====> 0----------number test end----------

　　

Member operations

Example:MembershipOperator.py

#!/bin/env python#-*-coding:utf-8-*-__author__ = ' Stephen ' # Define a list.test_list = [1, 2, 3, 4, 5, 6]def test_in (item)  :    If item in Test_list:        print ('%s is a member of test_list%s '% (item, test_list) '    else:        ' Print ('%s ' is ' not '  A member of test_list%s "% (item, test_list)) def test_not_in (item):    If Item not in Test_list:        print ('%s ' is not a Member of Test_list%s "% (item, test_list))    else:        print ("%s is a member of test_list%s "% (item, test_list)) # T Estprint ("%s%s%s"% ("-" *10, "in Test", "-" *10)) test_in (4) test_in (7) print ("%s%s%s"% ("-" *10, "not in Test", "-" *10)) test _not_in (4) test_not_in (7)

　Operation Result:

----------in Test----------4 is a member of Test_list [1, 2, 3, 4, 5, 6]7 are not a member of Test_list [1, 2, 3, 4, 5, 6]- ---------not in Test----------4 is a member of Test_list [1, 2, 3, 4, 5, 6]7 are not a member of Test_list [1, 2, 3, 4, 5, 6]

　　

Identity operations

Example:IdentityOperator.py

#!/bin/env python#-*-coding:utf-8-*-__author__ = ' Stephen ' Print ("%s%s%s"% ("-" *10, "number Test", "-" *10)) x = 2y = 2z = 3print ("x =%s"% x) print ("y =%s"% y) print ("z =%s"% z) if x is Y:print "x is Y" print ("ID (x) ====>%s"% ID (x ) Print ("id (y) ====>%s"% ID (y)) Else:print "x is not Y" print ("ID (x) ====>%s"% ID (x)) print ("id (y) ====>%s "% ID (y)) if x is Z:print" x is Z "print (" ID (x) ====>%s "% ID (x)) print (" id (z) ====>%s "% ID (  z)) Else:print "x is not Z" print ("ID (x) ====>%s"% ID (x)) print ("id (z) ====>%s"% ID (z)) print ("%s%s%s"% ("-" *10, "string test", "-" *10))    A = "Hello" b = "Hello" c = "World" Print ("a =%s"% a) print ("b =%s"% b) print ("c =%s"% c) if a was B:print "A is B" Print ("ID (a) ====>%s"% ID (a)) print ("id (b) ====>%s"% ID (b)) Else:print "A is not B" print ("ID (a) ====&G T %s "% ID (a)) print (" id (b) ====>%s "% ID (b)) If A is C:print" A is C "print (" ID (a) ====>%s "%ID (a)) print ("ID (c) ====>%s"% ID (c)) Else:print "A is not C" print ("ID (a) ====>%s"% ID (a)) print ("id (c) ====>%s "% ID (c))

Operation Result:

----------number Test----------x = 2y = 2z = 3x is Yid (x) ====> 5045844id (y) ====> 5045844x are not Zid (x) ====> 5 045844id (z) ====> 5045832----------string Test----------a = Hellob = Helloc = Worlda is bid (a) ====> 36823552id (b) = ===> 36823552a is not CID (a) ====> 36823552id (c) ====> 36823616

　　

Bit arithmetic

Example:BitwiseOperator.py

#!/bin/env python#-*-coding:utf-8-*-__author__ = ' Stephen ' # set the initial value of A and Bprint ("%s%s%s"% ("=", "s Tart "," = ")) A = 254            # 254 = 1111 1110b = 192            # 192 = 1100 0000c = 0print (" a=%s,binary:%s "% (A, bin (a))) print (" b =%s,binary:%s "% (b, bin (b))) # Testprint ("%s%s%s "% ("-"*20," Test Start ","-"*20)) C = A & Bprint (" C = A & B ====& Gt %s, binary:%s "% (c, bin (c))) C = A | Bprint ("C = a |  b ====>%s, binary:%s "% (c, bin (c))) C = a ^ bprint (" C = a ^ b ====>%s, binary:%s "% (c, bin (c))) C = ~aprint (" C = ~a ====>%s, binary:%s "% (c, bin (c))) C = a << 2print (" C = a << 2 ====>%s, binary:%s "% (c, Bin ( c))) C = a >> 2print ("C = a >> 2 ====>%s, binary:%s"% (c, bin (c))) print ("%s%s%s"% ("-" *20, "Test End", "-" *20))

　Operation Result:

====start====a=254,binary:0b11111110b=192,binary:0b11000000--------------------Test start--------------------c = A & B ====> 192, binary:0b11000000c = a |  b ====> 254, binary:0b11111110c = a ^ b ====>, binary:0b111110c = ~a ====> -255, binary: -0b11111111c = a << 2 ====> 1016, binary:0b1111111000c = a >> 2 ====>, binary:0b111111--------------------Test En D--------------------

　　

Operator Precedence

Example:ArithmeticOperatorPriority.py

#!/bin/env python#-*-coding:utf-8-*-__author__ = ' Stephen ' a = 12b = 3c = 4d = 2res = 0res = (A + b) * C/dprint ("(%d +  %d) *%d/%d ====>%d "% (a, B, C, D, res)) E = ((A + b) * c)/Dprint (" ((%d +%d) *%d)/%d ====>%d "% (a, B, C,  D, res)) E = (A + b) * (C/D) print ("(%d +%d) * (%d/%d) ====>%d"% (a, B, C, D, res)) E = a + (b * c)/dprint ("%d + (%d *%d)/%d ====>%d "% (a, B, C, D, RES))

　Operation Result:

(3) * 4/2 ====> ((+ 3) * 4)/2 ====> (+ 3) * (4/2) ====> 3012 + (3 * 4)/2 ====> 30

　　

python-Data Operations