Python tuple tuples

# One, create tuple # Tup1 = (' Physics ', ' Chemistry ', 1997, #) # tup2 = (1, 2, 3, 4, 5) # tup3 = "A", "B", "C", "D" # tuples containing only one element, need to be  Add a comma after the element to disambiguate # Tup1 = (50,) # Two, access tuple tup1 = (' Physics ', ' Chemistry ', 1997, 4) tup2 = (1, 2, 3, 5, 6, 7,) print ("tup1[0]: ", Tup1[0]) print (" Tup2[1:5]: ", Tup2[1:5]) # Tup1[0]: physics# Tup2[1:5]: (2, 3, 4, 5) # Third, modify the element values in the tuple # tuple are not allowed to be modified, but we can go to the tuple Row connection combinations, as follows: Tup1 = (34.56) tup2 = (' abc ', ' XYZ ') # The following modification of tuple element operations is illegal. # Tup1[0] = 100# Create a new tuple Tup3 = Tup1 + tup2print (TUP3) #以上实例输出结果: # (+, 34.56, ' abc ', ' XYZ ') # Four, delete the element value in the tuple # tuple is not allowed to be deleted, but we can make Use the DEL statement to delete the entire tuple # Five, tuple operators # As with strings, you can use the + sign and the * number to operate between tuples. This means that they can be combined and copied, and a new tuple is generated after the operation. # Six, tuple index, intercept # because tuples are also a sequence, we can access elements in a tuple at a specified location, or you can intercept an element in an index, as follows: # Seven, no closing delimiter # Any unsigned object, separated by commas, default to tuple # Eight, tuple built-in function # The Python tuple contains the following built-in functions # 1, CMP (Tuple1, Tuple2): Compares two tuple elements. # 2, Len (tuple): Calculates the number of tuple elements. # 3, max (tuple): Returns the maximum value of an element in a tuple. # 4, min (tuple): Returns the element minimum value in the tuple. # 5, tuple (seq): Converts a list to a tuple. # tuple Traps: When you define a tuple, the elements of the tuple must be determined when you define it # if you want to define an empty tuple, you can write t= () # to define a tuple with only 1 elements, t = (1,) tupleSemantic must be added with a comma, to disambiguate # "variable" tuple:t = (' A ', ' B ', [' A ', ' B ']) t[2][0] = ' X ' t[2][1] = ' y ' # T becomes (' A ', ' B ', [' X ', ' y ']) This tuple is defined by 3 elements, which are ' a ', ' B ', and a list, respectively. Doesn't it mean that once a tuple is defined, it's immutable? Why did you change it later?

　　

Python tuple tuples